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HomeMy WebLinkAboutLUA15-000185_Report 1DEPARTMENT OF COl\11v,UNITY AND ECONOMIC DEVELOPMENT DATE: PROJECT NUMBER: PROJECT NAME: PROJECT MANAGER: APPLICANT: CONTACT: PROJECT LOCATION: PLANNING DIVISION CERTIFICATE OF EXEMPTION FROM SHORELINE SUBSTANTIAL DEVELOPMENT May 15, 2015 LUA15-000185, SME Cedar River Maintenance Dredging Project Vanessa Dolbee, Current Planning Manager City of Renton 1055 S Grady Way Renton, WA 98057 Hebe C. Beranardo 1055 S Grady Way Renton, WA 98057 Extends from the mouth of the Cedar River at Lake Washington upstream approximately 6,500 feet to the Williams Street Bridge. PROJECT DESCRIPTION: The applicant has requested a Shoreline Exemption for the Cedar River maintenance dredging project. The maintenance dredging is required for the existing Lower Cedar River Section 205 Flood Hazard Reduction Project, as required per the USACE Project Cooperation Agreement and project operation and maintenance manual, to maintain the flood protection benefits of the federally constructed flood control project. The threshold for periodic maintenance dredging was based on ensuring flood protection against the 100-year recurrence interval event, with at least 90 percent reliability. The maintenance dredge would occur from the mouth of the Cedar River at Lake Washington upstream 1.23 miles to the Williams Ave. Bridge. The project is located in both Reach A and B of Cedar River which is designated Shoreline High Intensity. The maintenance dredge would remove up to four feet of sediment deposition with a 1-foot over dredge maximum allowance and is estimated to remove 125,000 cubic yards of sediment. An additional 10,840 cubic yards of material would be needed for bank stabilization and 55,000 cubic yards of dredged sediment material would be needed for temporary construction berms. In addition to the dredging, the project also includes maintenance and repair of existing bank stabilization structures, stormwater outfalls and new stabilization as necessary to conduct the dredge. Cedar River Maintenance Dredging .. -Ject Page 2 of 13 May 15, 2015 Two wetlands would be impacted which are proposed to be mitigated through mitigation bank credits. In addition, compensatory mitigation to offset impacts to fisheries and associated habitat resources are included in the proposal. Vegetation would be removed where necessary in the river and on river banks, including 6 trees. All temporary construction impacts to riparian vegetation would be replanted upon project completion. Environmental Review (SEPA) was completed on the project in 1998 via the adoption of the NEPA EIS for the Cedar River Section 205 Flood Damage Reduction Project, LUA97-192. For more information please see the attached Notice of Existing Environmental Document. The project reach includes the Williams Avenue South Bridge as the upstream (southern) limits and the mouth of the Cedar River at Lake Washington as the downstream (northern) site boundary. The Renton Municipal Airport is located west ofthe site and the Boeing Company's 737 production plant is located east of the site. A linear park corridor, Cedar River Park, is located along the east bank of the site between the river and the Boeing 737 plant site. In addition, several other commercial/industrial developments are presently adjacent to the project areas. The applicant submitted a Wetland and Stream/Riparian Habitat Report, a Mitigation Plan, Mitigation Bank Use Plan, and a Biological Assessment all prepared by GeoEngineers, dated September 13, 2013, December 4, 2014, November 25, 2014 and December 9, 2014 respectively (attached). The three reports describe the subject project and the proposed mitigation in great detail, including proposed BM P's and methodologies for completion of the project maintenance dredge. Based on the provided reports, the wetland, river and riparian habitats are currently degraded and beneficial functions are compromised. Within the project reach, the Cedar River is a constructed channel that historically has required continuous maintenance dredging for flood protection. The river is channelized through the project reach and the banks are armored in numerous areas with riprap concrete and/or wood retaining walls. Vegetation along the stretch of the Cedar River is generally limited to invasive species, including Japanese Knotweed, reed canarygrass, Himalayan blackberry, and Scotch broom in the understory. Several native tree species are also located within the riparian zone including red alder, Pacific willow, Sitka willow and black cottonwood. The native vegetation communities are dominant along the right bank of the river within the Cedar River Park. GeoEngineers identified and delineated seven wetlands within the project reach, identified as Wetlands A-G. Wetlands A, B, C, F, and Gare located on the east bank of the river and Wetland D and E are located on a gravel bar along the west bank. These wetlands are characterized as palustrine seasonally flood wetlands. Wetlands D and E contain emergent vegetation, Wetlands A and Care scrub/shrub-dominated and Wetlands B, F, and G are forested. Wetlands A, B, C, F, and G are rated as Category II wetland requiring 75-foot buffers and Wetlands D and E are rated as Category IV wetland requiring SO-foot buffers. Page 2 of 13 Cedar River Maintenance Dredging .ect Page 3 of 13 May 15, 2015 The proposed project would result in impacts to the riparian vegetation, the stream channel, and wetlands. Page 15, of the attached mitigation plan, provides additional details of the impacts to the site, which includes but is not limited to, riparian vegetation removal, bank armoring, channel adjustment, altered flow characteristics, and wetland impacts. Included within the mitigation plan is a set of mitigation goals and objectives. The goal of the provided mitigation plan is to provide adequate mitigation to compensate for the cumulative effects of the project. The original project (1998 Section 205 Flood Damage Reduction Project) and subsequent actions induced the following mitigation: 1. 1998: Groundwater Side Channel (destroyed by Nisqually earthquake in 2001) 2. 1999: Maplewood Large Woody Debris Levee Project 3. 2000: Elliott Spawning Side Channel (1998 Corps over-dredging mitigation, not originally including in the SEPA/NEPA EIS) 4. 1999-2000: Lower Cedar River riparian plantings 5. 2001 to 2011: Landsburg mitigation (annual gravel supplementation, except 2008) 6. 2010: Royal Hills Replacement Spawning Channel (replaced Groundwater Side Channel, not included in the original SEPA/NEPA EIS) 7. 2012: Elliott Spawning Channel flood damage repaired Additional mitigation proposed for the maintenance dredge includes the following (additional details can be found on Page 22 of the attached mitigation plan): 1. Invasive species management (onsite) 2. Native vegetation plantings (onsite) 3. Filling void space in riprap (onsite) 4. Lower Cedar River reach gabion removal (onsite) 5. Spawning channel maintenance and monitoring (offsite) 6. Lighting impacts reduction (onsite and offsite) 7. A scour monitoring study 8. Acquisition of wetland mitigation bank credits (offsite) The provided mitigation plan concludes that the goal of the proposed mitigation is to result in "no net loss" of habitat functions in the lower Cedar River by maintaining the existing mitigation features that were identified and constructed as part of the original USACE 205 flood project (1998), and providing additional mitigation to compensate for impacts not identified in the original project. GeoEngineer's continue to state that the maintenance dredging of the USACE 205 project was not needed in the timeline (3 years) that was assessed in the original environmental documents and mitigation plan. As of today, it has been more than 16 years since the last dredge cycle, as such the temporal loss of habitat functions and cumulative impacts that were identified for the 1998 project have been significantly reduced. The mitigation plan concludes that the features identified in the provided report would continue to compensate for the loss of habitat function into the future, as well as subsequent maintenance dredging that would occur in the future (See Table 4. Summary of Proposed Mitigation and Net Functional Effects, in the attached report). The proposed maintenance dredging project includes dredging, shoreline stabilization, and wetland impacts. Below is Staffs analysis of the project's compliance with the Shoreline Master Program related to the above three portions of the proposed maintenance project. Page 3 of 13 Cedar River Maintenance Dredging _ect Page 4 of 13 May 15, 2015 Dredging/Shoreline Stabilization: Pursuant to RMC 4-3-090F.3.b. Dredging Limited, dredging is permitted only in cases where the proposal, including any necessary mitigation, will result in no net loss of shoreline ecological functions and when proposed for flood control purposes, when a part of a publicly adopted flood control plan. The maintenance dredging is required for the existing Lower Cedar River Section 205 Flood Hazard Reduction Project, as required per the USACE Project Cooperation Agreement and project operation and maintenance manual, to maintain the flood protection benefits of the federally construction flood control project. As mentioned above, if the proposed mitigation plan is implemented the project would result in "no net loss" of shoreline ecological functions. RMC 4-3-090F.3.d, establishes review criteria for dredging projects, the applicable criteria is addressed below: 1) All proposed dredging operations shall be designed by an appropriate State-licensed professional engineer. A stamped engineering report and an assessment of potential impacts on ecological functions shall be prepared by qualified consultants and shall be submitted to the Renton Planning Division as part of the application for a shoreline permit. Staff Comment: Project is cam pliant with the above standard, see attached re parts and drawings. 2) The responsibility rests solely with the applicant to demonstrate the necessity ofthe proposed dredging operation. Staff Comment: The maintenance dredging is required far the existing Lawer Cedar River Section 205 Flood Hazard Reduction Project, as required per the USA CE Project Cooperation Agreement and project operation and maintenance manual, ta maintain the flood protection benefits of the federally construction flood control project. The federally constructed flood control project protects the adjacent land uses from flooding including, but not limited to, the Renton Municipal Airport and the Boeing 737 manufacturing plant. 3) The responsibility rests solely with the applicant to demonstrate that: (a) There will be no net loss of ecological functions including, but not limited to, adverse effect on aquatic species including fish migration. Staff Comment: The provided Biological Assessment concludes that the project would alter habitat within and adjacent to the Cedar River. The project would include removal of suitable spawning substrate and associated benthic invertebrates within the Cedar River, removal of riparian vegetation, and temporary impacts to water quality. These identified impacts directly affect salmon Essential Fish Habitat (EFH) as well as habitat which support salmon prey. Although the substrate exposed by dredging would be of similar composition as that removed, and proposed project-specific mitigation is anticipated to offset impacts to fish habitat, the study concludes that the appropriate determination for Pacific salmon EFH is "may adversely Page 4 of 13 Cedar River Maintenance Dredging ect Page 5 of 13 May 15, 2015 affect", "likely to adversely affect" far Puget Sound ESU Chinook salmon and Puget Sound DPS steel head trout, and designated critical habitat for Chinook salmon and steel head (should they be designated prior to completion of the project). However, the BA concludes that the project is "not likely to adversely affect" bull trout critical habitat. Moreover, the applicant has proposed mitigation for the identified impacts to fish and their critical habitat, and the proposed mitigation plan concludes the project would result in "no net loss" of shoreline ecological functions, and therefore the project is not anticipated to result in permanent impacts to fish migration. (b) There will be no adverse impact on recreational areas or public recreation enjoyment of the water. Staff Comment: The maintenance project would not change public access. However, during dredging operations some work would occur from Cedar River Park located along the east bank. Recreational boaters wauld not be able to utilize this reach of the river during dredging operations as the conditions would not be safe. The overall maintenance dredging would result in temporary impacts during construction to recreation at Cedar River Park and non-motorized boaters an the Cedar River. However, the project would not result in adverse impacts on recreational areas or public recreation and enjoyment of the water. 4) Adjacent Bank Protection: (a) When dredging bottom material of a body of water, the banks shall not be disturbed unless absolutely necessary. The responsibility rests with the applicant to propose and carry out practices to protect the banks. Staff Comment: Bank stabilization is a necessary component of the proposed maintenance dredge project, and is only proposed for essential flood control project features. Existing banks within the project reach have been armored with timber bulkheads, rock revetments, concrete slabs, and gabions. Much of the existing bank armoring is failing. Bank stabilization is limited ta those areas af the flood control project requiring stabilization (levees and floodwalls) based upon engineering analysis and design standards set forth by the USA CE. The GeoEngineers team identified those areas critical to stability of the flood control project and other critical infrastructure within the project limits. To address areas where bank protection is failing or never installed and is now needed, the project proposes repair, maintenance and some limited new bank protection (see attached reports for more details on bank stabilization, Table 1. Proposed Bank Stabilization Areas). GeaEngineers indicated that the bank stabilization proposed for the project would include a combination of rigid works and flexible defense works. Rigid works are necessary for the protection of existing flood control infrastructure due to its critical function at the project location, and the limited amount of lateral space between levees/I-walls and the river bank. Rigid works also reduce the footprint of the necessary bank stabilization towards the riverbed. The report concludes that it is therefore not possible to follow a "no action" alternative or to install features that are entirely or primarily flexible in nature. However, as a minimization measure for the impacts of revetments on natural riverine processes and habitat function, bioengineered flexible components would be incorporated into the design. The primary flexible component that would be incorporated into bank stabilization Page 5 of 13 Cedar River Maintenance Dredging ect Page 6 of 13 May 15, 2015 areas would include a tap dress of the armoring with topsoil and the installation of native vegetation plantings where allowed by USA CE standards and FAA guidelines and/or gross within the Vegetation Free Zone (VFZ). (b) If it is absolutely necessary to disturb the adjacent banks for access to the dredging area, the responsibility rests with the applicant to propose and carry out a method of restoration of the disturbed area to a condition minimizing erosion and siltation. Stoff Comment: Bonk impacts ore proposed both for stabilization work and temporary impacts to access the dredging area. Tobie 4. In the provided mitigation pion identifies impacts from both reduced riparian cover from access and bank stabilization at 67,514 SF and new stabilized banks at 184 linear feet. The applicant hos proposed mitigation for these impacts by planting enhanced riparian vegetation with shrubs and trees for 51,447 SF and enhanced riparian plantings with native gross for 60,823 SF. The new/maintained bank stabilization is proposed to be mitigated by applying bioengineering treatment to new, maintained and repaired rock armoring by filling void spaces with topsoil amended dredge material for a total of 1,709 lineor feet of bioengineered treatment. Overall, the mitigation pion indicates that the net functional effects of the proposed project impacts and associated mitigation would result in restoration/enhancement planting with o net increase of 44,756 SF of native riparian vegetation and 1,525 linear feet of existing hard armoring that would be maintained or repaired with bioengineered treatments. 5) Avoidance of Adverse Effects: The responsibility rests with the applicant to demonstrate the proposed dredging will avoid conditions that may adversely affect adjacent properties including: (a) Creating a nuisance to the public or nearby activity. Staff Comment: Overall, the dredge project would be temporary in nature, with most of the work occurring June 15 through August 31, due to fish windows. Some of the proposed mitigation work may occur outside the fish window (past August 31). The applicant has indicated that all construction would adhere to working hours as specified in Renton Municipal Cade (RMC) and haul routes would be restricted to arterial streets. However, the applicant has indicated a noise variance may be requested to a/law the contractor to haul material beyond the permitted haul hours per RMC. The subject site is primarily surrounded by commercial and industrial development including, but not limited to, the Boeing Plan Site, Renton Municipal Airport, and Renton Memorial Stadium. The Boeing 737 Plant and the Renton Municipal Airport operates 24 hours o day, bath of which are adjacent ta a large segment af the project reach. Due ta the land uses in the area (industrial and commercial) the construction noise and possible extended haul hours are not anticipated to adversely affect adjacent properties. The applicants have indicated that the maintenance dredging work would be coordinated with both the Renton Municipal Airport and the Boeing Company, in order to minimize disturbance to their operations. Furthermore, the applicant has indicated that the Cedar River Park, which is located along the right bank, would generally remain open to the public. Finally, the applicant will be requiring the contractor to develop o Dredge Work Plan. This Plan would identify methods, procedures, and equipment that would be used, describe how water quality impacts Page 6 of 13 Cedar River Maintenance Dredging ect Page 7 of 13 May 15, 2015 would be minimized during dredging and disposal activities, and notification information. It is anticipated that the Dredge Work Plan will become a condition of the DOE 401 Certification. The applicant has agreed to provide a copy of the Dredge Work Plan to the Planning Division upon completion. Based on the existing land uses, compliance with RMC construction hours, anticipated coordination with the Airport and Boeing, and limited impacts to recreation, the maintenance dredge is not anticipated to create a nuisance to the public and/or nearby activities. (b) Damaging property in or near the area. Staff Comment: The project has been designed by a professional engineer and it is not anticipated that the dredging would result in any damage to property in or near the area. (c) Causing substantial adverse effect to plant, animal, aquatic or human life in or near the area. Staff Comment: See response above under 3.a. (d) Endangering public safety in or near the area. Staff Comment: The maintenance dredging operations would occur both from in the river via floating dredge techniques and the banks with an excavator. The majority of the bank work would occur along the west bank accessing from the Renton Municipal Airport Perimeter Road. However, some of the work would occur from the east bank from areas within the Cedar River Park. To ensure that the public is notified and public safety is observed, staff recommends, as a condition of approval, that a public notification and safety plan (traffic contra/ and pedestrian safety) is prepared prior to commencement of the maintenance dredge work. 6) The applicant shall demonstrate control of contamination and pollution to water, air, and ground through specific operation and mitigation plans. Staff Comment: The submitted Biological Assessment {BA) addressed Best Management Practices {BMP's) that are intended to reduce the environmental effects of the maintenance dredging project. Specifically Page 15, section 2.6.2 identifies mitigation measures to protect water quality. The BA has identified the potential for short-term impacts to water quality as a result of increased turbidity during construction activities. The BA has indicated that turbidity impacts to the river ond lake would be controlled, to the extent feasible, by implementing the above mentioned construction stormwater BMPs defined in a CSWPPP. However, the BA indicated that is would not be possible for the project to completely prevent elevated turbidity levels during construction. The BA stated that due to the scale and extent of the proposed dredging project, the 300-foot river mixing zone allowed under WAC 173-201A-200{1){i) would not be sufficient, as such, the project proponents will be asking for a custom mixing zone to be applied to the subject project. This request would be forwarded to DOE in accordance with WAC 173-201A-410. Furthermore, it should be noted that a National Pollution Discharge Elimination System {NPDES) permit and a 401 Water Quality Certification would be required for the subject project, and compliance with the water quality standards would be monitored during Page 7 of 13 Cedar River Maintenance Dredging ect Page 8 of 13 May 15, 2015 construction as specified in the required state permits. Based on the proposed BMP's in the BA and the required state and federal permits, the applicant has demonstrated that the project would control pollution to water, air, and ground. 7) Disposal of Dredge Material: The applicant shall demonstrate that the disposal of dredged material will not result in net loss of ecological functions or adverse impacts to properties adjacent to the disposal site. (a) The applicant shall provide plans for the location and method of disposing of all dredged material. Staff Comment: The applicant has indicated that the disposal of the dredged material is planned to occur within an existing permitted upland disposal area. This disposal area could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, the applicant has not identified a disposal location as it would be the bid winning contractor's responsibility to ensure that the disposal site is permitted and compliant with any necessary regulations. Moreover, it is not anticipated that any dredge material would be disposed of within a shoreline, with the exception of re-used dredge material for project mitigation. (b) Dredged material shall not be deposited in a lake, stream, or marine water, except if· approved as habitat enhancement or other beneficial environmental mitigation as part of ecological restoration, a contamination remediation project approved by appropriate State and/or Federal agencies, or is approved in accordance with the Puget Sound Dredged Disposal Analysis evaluation procedures for managing in-water-disposal of dredged material by applicable agencies, which may include the U.S. Army Corps of Engineers pursuant to Section 10 (Rivers and Harbors Act) and Section 404 (Clean Water Act) permits, and Washington State Department of Fish and Wildlife Hydraulic Project Approval. Staff Comment: See comment above under 7(a). (c) In no instance shall dredged material be stockpiled in a shoreland area that would result in the clearing of native vegetation. Temporary stockpiling of dredged material is limited to one hundred eighty (180) days. Staff Comment: The applicant has indicated that onsite re-handling areas consist of mowed grass areas and invasive shrubs, which would be cleared and then re-planted or re-seeded with native plants in accordance with dredge plans and levee restrictions. Temporary stockpiling would not occur for more than 180 days. In addition, the applicant has indicated that temporary stockpiles will be protected against erosion using standard Best Management Practices (BMPs). In addition to this Shoreline Exemption, the applicant will be required to obtain a construction permit from the City of Renton. This permit shall include details related to TESC and SWPPP. (d) If the dredged material is contaminant or pollutant in nature, the applicant shall propose and carry out a method of disposal that complies with all regulatory requirements. Page 8 of 13 Cedar River Maintenance Dredging __ ject Page 9 of 13 May 15, 2015 Staff Comment: A Dredge Material Characterization Report was completed in December 2014 to evaluate the suitability of the material that will be generated from maintenance dredging. Sampling occurred from August 11-12, 2014. The results of the conventional and chemical analyses are presented in Tables 4-7 of the Dredge Material Characterization Report, which was provided to the USA CE. The result of the sampling indicated that the proposed dredge material is suitable for both in-water and upland reuse/disposal. The USA CE determination regarding suitability of dredge material for unconfined open water placement or in water beneficial use was received on December 4, 2014. See additional comments above under 7(a). (e) Permanent land disposal shall demonstrate that: (1) Shoreline ecological functions will be preserved, including protection of surface water and groundwater. (2) Erosion, sedimentation, flood waters or runoff will not increase adverse impacts to shoreline ecological functions or property. (3) Sites will be adequately screened from view of local residents or passersby on public rights- of-way. (4) The site is not located within a channel migration zone. Staff Comment: Staff Comment: See comment above under 7(a). Wetlands (RMC 4-3-090D.2.d.x.): Activities that adversely affect wetlands and/or wetland buffers shall include mitigation sufficient to achieve no net loss of wetland function and values. Compensatory mitigation shall be provided for all wetland alteration and shall re-establish, create, rehabilitate, enhance, and/or preserve equivalent wetland functions and values. l)Mitigation sequencing shall take place in the prioritized order provided for in section RMC 4- 3-0900.2.a.iii. Staff Comment: The applicant provided an analysis af mitigation sequencing in the provided Mitigation Bank Use Plan, prepared by GeoEngineers, dated November 25, 2014 (see page 2}. Seven small wetlands were identified within the project area for a total wetland area of 11,761 SF. The dredge prism has been designed to avoid impacts to five of seven wetlands. Most of the wetlands have been delineated along the fringes of the river, so variations in the width of the dredge prism allows the project to avoid these wetland areas. The provided Mitigation Bank Use Plan identifies that avoidance was effective to reduce the impacts from 11,761 SF ta 2,701 · SF. There are two small wetlands located within the River where the opportunity to avoid impacts was not feasible. The unavoidable impacts to wetlands are anticipated for these two small vegetated gravel bars (Wetland D and£, Category IV) located within the river channel. The wetlands that are proposed to be impacts are identified as transient features consisting of seasonally vegetated gravel bars that shift in extent and location through time. Temporary fill would be placed in these wetlands during dredging operations to construct temporary access berms. This fill would be subsequently removed and the river bed graded and dredged, and the margins planted as specified on the restoration plans (JARPA sheets 22 and 25). The Mitigation Page 9 of 13 Cedar River Maintenance Dredging .. -Ject Page 10 of 13 May 15, 2015 Bank Use Plan concludes that although the fill is temporary, the square footage of the impact is proposed to be mitigated as permanent, due to dredging impacts and to campensate for potential future impacts due to the need for recurrent cyclical dredging in the Cedar River channel. The applicant has indicated that the mitigation for these impacts would be through the use of mitigation bank credits at the Springbrook Creek Wetland and Habitat Mitigation Bank. The report concludes that the use of mitigation bank credits would adequately offset wetland functions impacted by the project and is preferable to on-site mitigation due to anticipated angoing need for cyclical dredging ta maintain the flood control benefits of the project. 2) Wetland alterations: Compensation for wetland alterations shall occur in the following order of preference: (A) Re-establishing wetlands on upland sites that were formerly wetlands. (B) Rehabilitating wetlands for the purposes of repairing or restoring natural and/or historic functions. (C) Creating wetlands on disturbed upland sites such as those consisting primarily of nonnative, invasive plant species. (D) Enhancing significantly degraded wetlands. (E) Preserving Category I or II wetlands that are under imminent threat; provided, that preservation shall only be allowed in combination with other forms of mitigation and when the Administrator of the Department of Community and Economic Development or designee determines that the overall mitigation package fully replaces the functions and values lost due to development. Staff Comment: See camments above under section 1., Mitigation Sequencing. The Mitigation Bank is the preferred option for the subject project due to ongoing dredging needs. 3) Special Requirements for Mitigation Banks: Mitigation banks shall not be subject to the replacement ratios outlined in RMC 4-2-090D.2.d.iv, but shall be determined as part of the mitigation banking agreement and certification process. Staff Comment: The Mitigation Bank Instrument for the Springbrook Mitigation Bank, specifies that 0. 70 credits are required per impact acre to Category IV wetland. Therefore the total allocation af credits proposed to offset project impacts is 0.044. See Table 3. Proposed Mitigation Bank Credits in the Mitigation Bank Use Plan attached. 4) Location: Compensatory mitigation shall be provided on-site or off-site in the location that will provide the greatest ecological benefit and have the greatest likelihood of success; provided, that mitigation occurs as close as possible to the impact area and within the same watershed sub-basin as the permitted alteration. Page 10 of 13 Cedar River Maintenance Dredging ct Page 11 of 13 May 15, 2015 Staff Comment: See comments above under section l,, Mitigation Sequencing 5) Protection: All mitigation areas whether on or off-site shall be permanently protected and managed to prevent degradation and ensure protection of critical area functions and values into perpetuity. Permanent protection shall be achieved through deed restriction or other protective covenant in accordance with RMC 4-3-050E4. Staff Comment: See comments above under section 1., Mitigation Sequencing 6) Timing: Mitigation activities shall be timed to occur in the appropriate season based on weather and moisture conditions and shall occur as soon as possible after the permitted alteration. Staff Comment: The Springbrook Creek Wetlond Mitigation Bank currently has sufficient credits avoilab/e to offset wetland impacts proposed in the subject project. The applicant hos indicated that the purchase and transfer of the credits would happen upon approval of all permits ond prior to construction of the dredge project. Proof of transfer is proposed to be provided to permitting agencies prior to concoction. 7) Wetland Mitigation Plans Required: Wetland mitigation plans shall be prepared in accordance with RMC 4-3-0SOM16. All compensatory mitigation projects shall be monitored for a period necessary to establish that performance standards have been met, but generally not for a period less than five (S) years. Reports shall be submitted quarterly for the first year and annually for the next five (5) years following construction and subsequent reporting shall be required if applicable to document milestones, successes, problems, and contingency actions of the compensatory mitigation. The Administrator of the Department of Community and Economic Development or designee shall have the authority to modify or extend the monitoring period and require additional monitoring reports for up to ten (10) years. Staff Comment: The applicant provided both o mitigation plan and associated plan sets (JAR PA) that are designed to result in no net loss of shoreline ecological functions. The subject project requires both Federal and State permits beyond the locate Shoreline Exemption. Based on past experience the mitigotion monitoring requirements employed by both the Federal and State level are more restrictive and for a longer duration then Renton Municipal Code would require. It is advantageous to allow the project to conduct one maintenance and monitoring schedule for all levels of permitting for the subject project (i.e. Local, State, and Federal). As such, staff recommends os a condition of approval thot the City of Renton Planning Division receive a copy of any and all mitigation maintenance monitoring reports that are to be provided to either the State and/or Federal permitting ogencies. SEC-TWN-R: LEGAL DESCRIPTION: SE07, 17, and 18 Township 23N Range 05 E None Available -See Vicinity Map (attached) Page 11 of 13 Cedar River Maintenance Dredging _ject Page 12 of 13 May 15, 2015 WATER BODY/ WETLAND: Cedar River (7 wetlands) An exemption from a Shoreline Management Substantial Development Permit is hereby approved with conditions on the proposed project in accordance with Maintenance and Repair: Normal maintenance or repair of existing structures or developments, including damage by accident, fire or elements. a. "Normal maintenance" includes those usual acts to prevent a decline, lapse, or cessation from a lawfully established condition. b. "Normal repair" means to restore a development to a state comparable to its original condition, including but not limited to its size, shape, configuration, location and external appearance, within a reasonable period after decay or partial destruction, except where repair causes substantial adverse effects to the shoreline resource or environment. c. Replacement of a structure or development may be authorized as repair where such replacement is the common method of repair for the type of structure or development and the replacement structure or development is comparable to the original structure or development including, but not limited to, its size, shape, configuration, location and external appearance and the replacement does not cause substantial adverse effects to shoreline resources or environment and for the following reasons: The subject project is a maintenance dredge and therefore would be considered regular maintenance and repair. Conditions of Approval: 1. To ensure that the public is notified and public safety is observed the applicant shall prepare a public notification and safety plan for review and approval by the City of Renton Current Planning Project Manager and Community Services prior to commencement of the maintenance dredge work. 2. The applicant shall provide the City of Renton Planning Division copies of any and all mitigation maintenance monitoring reports that are to be provided to either the State and/or Federal permitting agencies. The proposed development is Consistent or Inconsistent with: Consistent Consistent Consistent Policies of the Shoreline Management Act. The guidelines of the Department of Ecology where no Master Program has been finally approved or adapted by the Department. The City of Renton Shoreline Master Program. Page 12 of 13 Cedar River Maintenance Dredging .. -Ject Page 13 of 13 May 15, 2015 SIGNATURE & DATE OF DECISION: Jennifer Henning, Planning Director Attachments: Vicinity/Neighborhood Detail Map May 15. 2015 Date Mitigation Plan (JARPA, Wetlands and Stream Report, and Mitigation Bank Use Plan) Biological Assessment Notice of Existing Environmental Documents cc: City of Renton/ Applicant Page 13 of 13 ~ e ~ ~ x' w I ii Legend D Project Boundary c=J Parcels RECEIVED MAR 2 3 2015 CITY OF RENTON 1,000 o 1,000 -----Feet i ~ PLANNING DIVISION. ____________ ~ (I) Data Source: Imagery obtained from Microsoft Bing Maps 2013 a M Projection: WGS 1984 Web Mercator Auxiliary Sphere Vicinity Map g Notes: § 1. The locations of all features Shown are approximate. Cedar River Maintenance Dredge Project § 2. This drawing is for information purposes. It is intended to Renton, Washington __ " 0 ; 0 assist in showing features discussed in an attached .: document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file G E 9 ~ isstoredbyGeoEngineers,lnc.andwillserveasthe EQ NGINEERS / /1 .c official record of this communication. il'L _______________________ _L=========================l Figure 1 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT DATE: PROJECT NUMBER: PROJECT NAME: PROJECT MANAGER: APPLICANT: CONTACT: PROJECT LOCATION: PLANNING DIVISION CERTIFICATE OF EXEMPTION FROM SHORELINE SUBSTANTIAL DEVELOPMENT . C lv-'j"--- M ~i5 LUA15-000185, SME Cedar River Maintenance Dredging Project Vanessa Dolbee, Current Planning Manager City of Renton 1055 S Grady Way Renton, WA 98057 Hebe C. Beranardo 1055 S Grady Way Renton, WA 98057 -=~~--"'--- Extends from the mouth of the Cedar River at Lake Washington upstream approximately 6,500 feet to the Williams Street Bridge. PROJECT DESCRIPTION: The applicant has requested a Shoreline Exemption for the Cedar River maintenance dredging project. The maintenance dredging is required for the existing Lower Cedar River Section 205 Flood Hazard Reduction Projec&,s required per the USACE Project Cooperation Agreement and project operation and maintenance manu~o maintain the flood protection benefits of the federally construction flood control project. -hie threshold for periodic maintenance dredging was based on ensuring flood protection against the 100-year recurrence interval event, with at least 90 percent reliability. The maintenance dredge would occur from the mouth of the Cedar River at Lake Washington upstream 1.23 miles to the Williams Ave. Bridge. The project is located in both Reach A and B of Cedar River which is designated Shoreline High Intensity. The maintenance cjred~s would remove up to four feet of sediment deposition with a Hoot over dredg~n~~.i'nce aui;i.e A'lBl!i~m and is estimated to remove 125,000 cubic yards of sediment. An additional 10,840 cubic yards of material would be needed for bank stabilization and 55,000 cubic yards of dredged sediment material would be needed for temporary construction berms. In addition to the dredginijhe project also includes maintenance and repair of existing bank stabilization structurear-stormwater outfalls and new stabilization as necessary to conduct the dredge. Vanessa Dolbee From: Sent: To: Cc: Subject: Follow Up Flag: Flag Status: Hebe Bernardo Tuesday, May 12, 2015 10:04 AM Vanessa Dolbee Shane Phillips (shane.phillips@hatchmott.com); Joe Callaghan Ucallaghan@geoengineers.com); Ronald Straka RE: SME Follow up Flagged Hi Vanessa. Thank you for your email. Please see responses below in blue. S) Avoidance of Adverse Effects: The responsibility rests with the applicant to demonstrate the proposed dredging will avoid conditions that may adversely affect adjacent properties including: {a) Creating a nuisance to the public or nearby activity. Maintenance Dredging is needed to maintain the project flood protection benefits, as required in the Project Cooperation Agreement between the City of Renton and USACE. The Threshold for periodic maintenance dredging is based on ensuring flood protection against the 100-year recurrence interval event, with at least 90-percent reliability. The Cedar River channel will be excavated to an average of 4 feet below the Maximum Allowable Average Channel Bed Profile. Width of the maintenance dredge will accommodate the variable channel widths throughout the project reach and will be the same or less width than the original dredging width. Dredged side slopes will be 3:1 unless otherwise required for local bank stabilization maintenance work or if required for geotechnical or structural stability of existing infrastructure. The construction of the Cedar River Maintenance Dredging project will be temporary, with most of the work occurring between June 15 through August 31. It is anticipated that some of the mitigation work related to riparian vegetation will occur outside the fish window. The extent of the mitigation work has not been agreed upon, and therefore total duration of construction has not been estimated. Haul routes will be restricted to arterial streets. Construction hours will adhere to working hours specified in City Code. A noise variance may be needed to allow contractor to haul material at night. The haul route for the dredge material will be selected as part of the design process to minimize traffic problems. The project design and construction will be coordinated with Airport and Boeing operations to minimize disturbance to Airport and Boeing operations. Airport operations may need to be scheduled during specific time periods of the day to accommodate dredging and levee maintenance on the left bank. There is also a chance that Boeing operations would need to be altered, or schedules modified, due to construction operations along the airport access road .. The public may be restricted from some portions of the Cedar River Park on the right bank, but in general the park should remain open. The City will work with all affected parties to ensure nuisance impacts are minimized. Other adjacent properties are generally commercial or industrial and would not be affected. Two methods of dredging will be conducted in order to remove accumulated sediments from the entire project reach an°as in the most efficient manner. These will be a combination of water-based and land based dredging methods. For water-based dredging, it is expected that the type of equipment utilized will be an 1 excavator or crawler crane moun,~d on a portable sectional barge. Land oased will utilize excavators working from berms along the stream bank within the river channel. Please see page 4 of the Mitigation Plan for additional information. The City will be including in the Special Provisions specific language that will require the contractor to develop a Dredge Work Plan. The Dredging and Disposal Work Plan will identify methods, procedures, and equipment that will be used; describe how water quality impacts will be minimized during dredging and disposal activities; and notification information. It ,.v,11 be a condition of the Department ot Ecology's 401 Certification to require submittal of a Dredging and Disposal Plan at least 2 weeks prior to start ot dredge for DOE's review and approval. The Surface Water Utility will send a copy of the Dredge Plan to the Planning Division before dredge work starts. 7) Disposal of Dredge Material: The applicant shall demonstrate that the disposal of dredged material will not result in net loss of ecological functions or adverse impacts to properties adjacent to the disposal site. (a) The applicant shall provide plans for the location and method of disposing of all dredged material. Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. (b) Dredged material shall not be deposited in a lake, stream, or marine water except if approved as habitat enhancement or other beneficial environmental mitigation as part of ecological restoration, a contamination remediation project approved by appropriate State and/or Federal agencies, or is approved in accordance with the Puget Sound Dredged Disposal Analysis evaluation procedures for managing in-water-disposal of dredged material by applicable agencies, which may include the U.S. Army Corps of Engineers pursuant to Section 10 (Rivers and Harbors Act) and Section 404 (Clean Water Act) permits, and Washington State Department of Fish and Wildlife Hydraulic Project Approval. Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. (c) In no instance shall dredged material be stockpiled in a shoreland area that would result in the clearing of native vegetation. Temporary stockpiling of dredged material is limited to one hundred eighty (180) days. Onsite re-handling areas consist of mowed grass areas and invasive shrubs, which will be cleared and then re- planted or re-seeded with native plants in accordance with dredge plans and levee restrictions. Temporary stockpiling will not occur for more than 180 days. Temporary stockpiles will be protected against erosion using standard Best Management Practices (BMPs). (d) If the dredged material is contaminant or pollutant in nature, the applicant shall propose and carry out a method of disposal that complies with all regulatory requirements. Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. 2 . A Dredge Material Characteriza"-n Report was completed in December LU14 to evaluate the suitability of the material that will be generated from maintenance dredging. Project area was divided into six DMMUs. Five target sampling locations were established within each DMMU for the collection of the samples for compositing and analysis. Sampling occurred from August 11-12, 2014. The results of the conventional and chemical analyses are presented in Tables 4-7 of the Dredge Material Characterization Report; and it indicates that the proposed dredge material is suitable for both in-water and upland reuse/disposal. Corps determination regarding suitability of dredge material for unconfined open water placement or in water beneficial use was received on December 4, 2014. (e) Permanent land disposal shall demonstrate that: (1) Shoreline ecological functions will be preserved, including protection of surface water and groundwater. Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. (2) Erosion, sedimentation, flood waters or runoff will not increase adverse impacts to shoreline ecological functions or property. Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. (3) Sites will be adequately screened from view of local residents or passersby on public rights-of-way. Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. (4) The site is not located within a channel migration zone Disposal of the dredged material is planned to occur within an existing permitted upland use area. This could include existing, permitted sand and gravel processing facility, a permitted temporary re-handling site or a permitted upland construction site. Therefore, this permit does not cover disposal of dredged materials within the Shorelines of the State. Finally the following standards I addressed with a condition of approval, if your cansultont would like to address this then I can amend my analysis accordingly. (d) Endangering public safety in or near the area. Staff Comment: The maintenance dredging operations would occur both from in the river via floating dredge techniques and the banks with an excavator. The majority of the river bank work would occur along the west bank accessing from the Renton Municipal Airport Perimeter Road. However, some of the work would occur 3 from the east bank from areas w1 ... m the Cedar River Park. To ensure that rhe public is notified and public safety is observed, staff recommends as a condition of approval that a public notification and safety plan is prepared prior to commencement of the maintenance dredge work. A traffic control and pedestrian safety plan will be prepared to review and approval by the City prior to start of construction. From: Vanessa Dolbee Sent: Monday, May 11, 2015 11:54 AM To: Hebe Bernardo Subject: SM E Hebe, Do you have an update on the response to the Dredging questions? Thanks. Vanessa 4 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT I"' ,,.a . City of. __ ..--,,,.,,,.,,--'I ~.· r/·l. r' r r· •1 r .. ·. . ~ i -->-,It·-.·-·"""" ::;J. __ NOTICE OF EXISTING ENVIRONMENTAL DOCUMENT Pursuant to WAC 197-11-600 Notice of existing environmental document, Final Detailed Project Report and Environmental Impact Statement, Cedar River Section 205 Renton, Washington (LUA97-192) Date of Adoption: May 4, 2015 Date of Original EIS: January 6, 1998 Proponent: City of Renton Project Numbers: LUA15-000185 and LUA97-192 Project Names: Cedar River Maintenance Dredging Project (Cedar River Section 205 Flood Damage Reduction Project) Proposal/ Conditions Analysis: The City of Renton Surface Water Division has requested that the Environmental Review Committee make a determination that the existing SEPA/NEPA EIS (LUA97-192) evaluated the Cedar River Maintenance Dredge and is sufficient to mitigate any impacts related to the maintenance dredge (LUA15-000185) without a Supplemental EIS. Pursuant to WAC 197-11-600 an agency may use environmental documents that have previously been prepared in order to evaluate proposed actions, alternative, or environmental impacts. Pursuant to WAC 197-ll-600(3)(b) the preparation of a new threshold determination or supplemental EIS is required in the following cases: i) Substantial changes to a proposal so that the proposal is likely to have significant adverse environmental impacts; or ii) New information indicating a proposal's probable significance adverse environmental impacts. A new threshold determination or SEIS in not required if probable significant adverse environmental impacts are covered by the range of alternatives and impacts analyzed in the existing environmental documents. The proposed maintenance project is needed to maintain adequate flood conveyance in the Cedar River to protect adjacent properties as required by the Project Cooperation Agreement with the U.S. Army Corps of Engineers (USACE) associated with the initial construction of the Lower Cedar River Section 205 Flood Hazard Reduction Project in 1998. The proposed maintenance dredge extends from the mouth of the Cedar River at Lake Washington upstream Notice of Existing Environ men ta. uocuments Page 2 of 5 May 8, 2015 approximately 6,500 feet to the Williams Street Bridge. This section of river was last dredged in 1998 by the USACE, following the preparation and approval of a National Environmental Policy Act (NEPA) Environmental Impact Statement (EIS) for the project. The NEPA EIS was adopted by the City of Renton to satisfy SEPA, via City file number LUA97-192 (Attached). The SEPA/NEPA EIS evaluated alternatives, including required future maintenance dredging, and identified mitigation actions that were implemented for all initial and future maintenance dredging impacts. Maintenance dredging was originally anticipated to be needed every three years, which was used to establish project mitigation actions. Maintenance dredging for the 205 Flood Hazard Reduction Project has not occurred since the conception in 1998; which exceeds the identified threshold in the SEPA/NEPA EIS by 14 years. The 205 Flood Hazard Reduction Project also included the following elements: future periodic maintenance dredging anticipated every three years; construction of flood walls, levees and low berm; bank armoring (riprap) along the left bank; modification to the South Boeing Bridge, including burying utilities and placement of rock/concrete below the ordinary high water mark (OHWM); and compensatory mitigation to offset impact to fisheries and associated habitat resources. The SEPA/NEPA EIS evaluated and required mitigation for the initial construction and impacts associated with the anticipated future maintenance dredging (every 3 years). The following is a brief list of the required mitigation from the SEPA/NEPA EIS (details are included in the attached letter from GeoEngineers, dated March 18, 2015), alternative mitigation completed for the USACE over dredge and the impacts to existing mitigation from the Nisqually earthquake. 1. 1998: Groundwater Side Channel (destroyed by Nisqually earthquake in 2001) 2. 1999: Maplewood Large Woody Debris Levee Project 3. 2000: Elliot Spawning Side Channel (1998 USACE over-dredging mitigation, not originally including in the SEPA/NEPA EIS) 4. 1999-2000: Lower Cedar River riparian plantings 5. 2001 to 2011: Landsburg mitigation (annual gravel supplementation, except 2008) 6. 2010: Royal Hills Replacement Spawning Channel (replaced Groundwater Side Channel, not included in the original SEPA/NEPA EIS) 7. 2012: Elliot Spawning Channel flood damage repaired GeoEngineers evaluated the minor changes in the project and environment since the original SEPA/NEPA EIS in 1998 (details in the attached letter). The following is a list of minor differences between the 1998 anticipated maintenance dredging and todays proposal: 1. Advancements in dredging technologies, which would improve the accuracy of dredging activates and promote adherence to the approved dredge designs would be utilized. This would reduce the environmental impact of the overall maintenance project. 2. Disposal and possible reuse of dredge spoils. This change is anticipated to have no net effect on the environmental impacts of the project. In fact, the reuse may result in a beneficial effect when used onsite to fill void spaces in bank stabilization maintenance to reduce predatory fish habitat and create habitat/planting benches, as proposed. Notice of Existing Environmenta1 1..1ocuments Page 3 of 5 May 8, 2015 3. More extensive riparian plantings, which are anticipated to have a beneficial net environmental effect. 4. Listing of Puget Sound steelhead under the federal Endangered Species Act since the time of the previous dredge. The impacts of the maintenance dredge on this species would be generally consistent with the impacts to Chinook salmon, which were evaluated and mitigated as part of the 1998 project. As such, the listing of Puget Sound steelhead is not anticipated to change the impact analysis and associated mitigation as originally identified in 1998. 5. Wetlands have been identified in the Cedar River Channel within the 205 project reach. The maintenance project is anticipated to impact 0.062 acres (2,700 sf) of wetlands. To mitigate this impact the applicant has proposed to buy mitigation Bank Credits, which would adequately offset project impacts resulting in no net environmental impact. 6. Expanded mitigation proposed beyond the original 1998 project, such as filling voids spaces in riprap, removal of a section of existing gabion basket armoring, and lighting impacts reduction. The additional mitigation is anticipated to have a beneficial environmental impact (details on additional mitigation can be found in the attached letter from GeoEngineers). GeoEngineers concludes in their letter that the proposed Cedar River maintenance activities were identified in the original 1998 $EPA/NEPA EIS for the project and were addressed in the regulatory approvals and mitigation planning for the 1998 dredge. The proposed maintenance project has been designed based on the original approved design from the 1998 project. The scope of the project remains the same as 1998 with the exceptions as noted above and a significant reduction to impacts along the left bank. City Staff concurs with the GeoEngineers conclusions as noted above and has determined that the proposed maintenance dredge is consistent with WAC 197-11-600(3). The proposed maintenance project would not result in substantial changes to the 1998 proposal that would result in significant adverse environmental impacts. In addition, the existing SEPA/NEPA EIS has covered the anticipated environmental impacts that would result from the proposed maintenance dredge and mitigation was adequately identified and implemented; therefore, the existing environmental documentation satisfies the SEPA requirements for the subject project as permitted in WAC 197-11-600. The City of Renton has determined that the existing SEPA/NEPA EIS issued under LUA97-192, Cedar River Section 205 Flood Damage Reduction Project, would meet all the agency's responsibilities under SEPA to cover the Cedar River Maintenance Dredge, LUA15-000185, as the proposal has minimal changes and complies with WAC 197-11-600(3). Location: Extends from the mouth of the Cedar River at Lake Washington upstream Notice of Existing Environmenta1 uocuments Page 4 of s May 8, 2015 lead Agency: Review Process: approximately 6,500 feet to the Williams Street Bridge City of Renton, Department of Community & Economic Development Adoption of existing environmental documents, SEPA/NEPA EIS. Additional Information: If you would like additional information, please contact Vanessa Dolbee, Current Planning Manager, City of Renton Planning Division, Department of Community & Economic Development at (425) 430-7314. There is no comment period for this determination, dated May 4, 2015 issued by the City of Renton Environmental Review Committee. Notice of Existing Environmenta1 uocuments Page 5 of 5 May 1, 2015 ENVIRONMENTAL REVIEW COMMITIEE SIGNATURES: Gregg Zimmerman, Administrator Public Works Department Community Services Department ry,C e~ Mark Peterson, Administrator Fire & Emergency Services Department C.E. "Chip" Vincent, Administrator -I QJ Department of Community & Economic Development Date Date J'iA.y 'f. ?Ot) I 1 Date 'Date March 18, 2015 Prepared for: City of Renton Planning Division 1055 South Grady Way Renton, Washington 98057 Attention: Vanessa Dolbee On behalf of: City of Renton GEoENGINEERS CJ 1101 South Fawcett Avenue,.Suite 200 Tacoma, Washington 98402 253.383.4940 RECEIVED MAR 2 3 2015 CITY OF RENTON PLANNING DIVISION Public Works -Surface Water Utility 1055 South Grady Way, Fifth Floor Renton, Washington 98057 Subject: State Environmental Policy Act (SEPA) Permitting Summary Cedar River Maintenance Dredging Project Renton, Washington File No. 0693-073-00 INTRODUCTION The City of Renton is proposing to perform maintenance dredging of accumulated sediment within the lower 1.23 miles of the Cedar River. This maintenance project is needed to maintain adequate flood conveyance in the Cedar River to protect adjacent properties as required by the Project Cooperation Agreement with the U.S. Army Corps of Engineers (USAGE) associated with the initial construction of the Lower Cedar River Section 205 Flood Hazard Reduction Project in 1998. This section of the river was last dredged in 1998 by the USAGE, following the preparation and approval of a National Environmental Policy Act (NEPA) Environmental Impact Statement (EIS) for the project, which was adopted by the City of Renton to satisfy the State Environmental Policy Act (SEPA, City of Renton File No. LUA-97-192,SP,SM). The NEPA EIS evaluated alternatives, including required future maintenance dredging, and identified mitigation actions that were implemented for all initial and future maintenance dredging impacts. Maintenance dredging was originally anticipated to. be needed every three years, which was used to establish project mitigation actions. However, maintenance dredging has not needed to be performed for nearly 17 years, even though the mitigation was based upon a more frequent impacts associated with maintenance dredging needing to be completed once every three years. Stream bank improvements directly related to the maintenance of the 205 flood control project are also proposed to manage the effects of erosion on adjacent flood control structures and facilities. The City of Renton Department of Public Works -Surface Water Utility is requesting the City's Environmental Review Committee to concur that the original NEPA EIS, which the City adopted to comply with SEPA is also adequate for satisfying SEPA for the work proposed for the Cedar River Maintenance Dredging Project. City of Renton March 18, 2015 Page2 GeoEngineers, Inc. (GeoEngineers) has prepared this SEPA letter in support of the Cedar River Maintenance Dredging Project, which is proposed by the City of Renton Department of Public Works -Surface Water Utility. The purpose of this letter is to summarize the original USAGE Section 205 Dredging Project, identify the NEPA and SEPA approval processes used for the original project in 1998, and to identify consistencies and differences between the original project and the current proposal. GeoEngineers has prepared this summary under sutx:ontract to Coast & Harbor Engineering (CHE) to provide environmental permitting support for the project to the City of Renton. Project Location The project is located in Renton, King County, Washington, extending from the mouth of the Cedar River at Lake Washington (lat/long. coordinates 47.50048, -122.21589) upstream approximately 6,500 feet to the Williams Street Bridge (47.48433, -122.20664). It is within Sections 7, 17 and 18 of Township 23N, Range 05E, of the Willamette Meridian. The Cedar River is within the Hydrological Unit Code (HUC) 17110012 (Lake Washington Watershed)1 and within Water Resources Inventory Area (WRIA) 8 (Cedar/Sammamish)2. Purpose • Maintenance dredging for existing Lower Cedar River Section 205 Flood Hazard Reduction Project as required per the USAGE Project Cooperation Agreement and project O&M manual to maintain the flood protection benefits of the federally constructed flood control project. • Continuation of 1998 permitted project. 1998 DREDGE PROJECT Project Description and Background The Cedar River Section 205 Flood Reduction Project is a USAGE project implemented in 1998. This project included d.redging the channel to remove up to four feet of sediment deposition (estimated 125,000 cubic yards [CY]) below the 1995 bed elevation (the permitted elevation depth per the approved NEPA EIS document) in the lower river between the Logan Avenue North Bridge and the mouth of the river, with a gradual sloping transition reach upstream of Logan Avenue North, to match the existing channel elevation at the Williams Avenue North Bridge and to reduce headcutting. The purpose of this Section 205 project was flood protection of existing industrial development on either side of the river and City of Renton Municipal Airport facilities on the left (west) bank. The project also included the following elements: future periodic maintenance dredging anticipated every three years; construction of flood walls, levees and a low berm; bank armoring (riprap) along the left bank; modifications to the South Boeing Bridge, including burying utilities and placement of rock/concrete below ordinary high water (OHW); and compensatory 1 Environmental Protection Agency. 2013. Surf Your Watershed. http·//cfoqb eoa.gov/surf/locate/index.cfm. 2 Washington Department of Ecology. 2013. Washington Water Resource Inventory Area (WRIA) Maps. http://www.ecv wa. gov /services/ gjs/ma os/wria/wria .htm. File No. 069:3 07 3-00 GEoENGINEERS ti) ', City of Renton March 18, 2015 Page3 mitigation to offset impacts to fisheries and associated habitat resources. A grade control structure at the upper limit of the project was evaluate.d and approved during the NEPA process.3 Previous Mitigation The 1998 project permits required extensive mitigation for the initial construction impacts and impacts associated with the anticipated future maintenance dredging. Mitigation for the Lower Cedar River Section 205 Project, including the resulting excessive dredging and recurring maintenance dredging for the life of the project, has included the following. • 1998: Groundwater Side Channel (destroyed by Nisqually earthquake in 2001) • 1999: Maplewood Large Woody Debris Levee Project • 2000: Elliot Spawning Side Channel (1998 Corps over-dredging mitigation) • 1999-2000: Lower Cedar River riparian plantings • 2001 to 2011: Landsburg mitigation (annual gravel supplementation, except 2008) • 2010: Royal Hills Replacement Spawning Channel (replaced Groundwater Side Channel) • 2012: Elliot Spawning Channel flood damage repaired The mitigation outlined above has included the following elements. • Spawning Channels. The USAGE in coordination with the City has constructed several sockeye salmon (Oncorhynchus nerka) spawning channels as mitigation for impacts from the 1998 dredging project and cyclical maintenance dredging, and provided monitoring of fish utilization within the project reach and the constructed spawning channels. The original Groundwater Side Channel constructed in 1998 at Ron Regis Park was supplemented with the Elliot Spawning Channel in 2000 to mitigate for the one- time loss of redds resulting from the unanticipated channel adjustment upstream of the project possibly exacerbated by the excessive dredging that occurred during project implementation in 1998. The Hydraulic Project Approval (HPA) permit from the Washington Department of Fish and Wildlife (WDFW) included a provision requiring 10 years of performance monitoring and maintenance for the Elliot Spawning Channel. When the Groundwater Side Channel was destroyed in 2001, the Elliot Spawning Channel had been constructed and was providing .mitigation necessary for the channel adjustment and excessive dredging. The Elliot Spawning Channel fulfilled its necessary mitigation needs for channel adjustment in the second year following construction; and continued to provide other project mitigation in the absence of the Groundwater Channel as required by the 1997 project EIS, until the Royal Hills channel was constructed in 2010. The Elliot Spawning Channel has been damaged by floods and natural channel migration that has reduced flows and caused deposition offine sediments, reducing the porosity of the porous levee resulting in decreased flows into the channel. The channel was reconstructed in 2012, but has been subject to additional sedimentation due to insufficient flow problems caused by changes in the Cedar River location that provides flow to the Elliot Channel. 3 U.S. Army Corps of Engineers. 1997. Final Detailed Project Report and Environmental Impact Statement. Cedar River Section 205, Renton, Washington. June 1997. GEOENGINEERS CJ File No. 0693-073·00 City of Renton March 18, 2015 Page 4 • Large Woody Debris. Large woody debris (LWD) and bioengineered revetment placement along an existing _revetment at the Maplewood Golf Course. • Riparian Plantings. Riparian plantings, including vegetation monitoring, at the following loc.ations: • Right bank from South Boeing Bridge to mouth (approximately 4,850 LF). • Left bank from Logan Avenue to small aircraft hangars (approximately 3,800 LF). • Gravel Supplementation. Stockpiling dredged gravel for future use and placement of up to 1,000 CY of gravel per year for 10 to 15 years upstream at the Landsburg site as a salmon spawning habitat enhancement measure. NEPA and SEPA Processes The USAGE 1998 project was a federal project authorized under Section 205 of the federal Flood Control Act. The USAGE led the NEPA process, ensuring compliance with various environmental regulations in effect at the time, and developing a NEPA Environmental Impact Statement (EIS), which analyzed several project alternatives, including the preferred alternative that was implemented in 1998. The EIS was previously prepared and approved and included analysis for continued maintenance dredging needed to maintain the flood protection benefits of the project, which is the current proposal. SEPA requirements were fulfilled by the City of Renton through adoption of the existing NEPA environmental documentation for the entire project (Final EIS)4 • Since the current maintenance dredging proposal was analyzed and approved in the original NEPA action, which was adopted by the City for SEPA, we have identified the minor changes in the project and environment that have occurred since 1998. PROPOSED PROJECT Proposed Action The proposed action is maintenance of the 1998 USAGE Lower Cedar River Section 205 Flood Hazard Reduction Project originally implemented in 1998. Atthe time of preparation and approval of the EIS for. the 1998 project, maintenance dredging was anticipated to be needed every three yearss. Maintenance of levees and floodwalls, and bank stabilization are also proposed as part of the maintenance project. The design and extent of the current proposal is consistent with the original project. The current maintenance work will take advantage of current technologies and methods that differ from the original project, which will reduce overall environmental impacts. For example, more focused dredging methods will be used to reduce deviation from the approved design. A complete detailed project description is included in the Joint Aquatic Resources Permit Application (JARPA), which is included as Appendix A to this letter. The maintenance dredging depth will be approximately four feet, which is consistent with the USAGE 205 project permitted dredge design depth of four feet below the 1995 bed elevation (the permitted elevation 4 City of Renton Planning/Building/Public Works. December 30, 1997. Cedar River Section 205 Project. Memorandum to ERG from Mark R. Pywell and Ross Hathaway. 5 U.S. Army Corps of Engineers. 1997; Final Detailed Project Report and Environmental Impact Statement. Cedar River Section 205, Renton, Washington. June 1997, GEoENGINEERS CJ File No. 0693-073-00 \ City of Renton March 18, 2015 Page 5 depth per the approved NEPA EIS document). The dredge width will be variable to match channel variations along the length of the project, and will be designed to avoid impacts to stability of the river bank, including existing bank protection features. The channel slope will match t.he 1998 USACE design, exceptwithin the transition area. The transition slope between Logan Avenue and Williams Avenue will be 0.63 percent. Bank stabilization maintenance and repair are also proposed, with limited new armoring. Most of this work will be on the left bank adjacent to the airport, with limited repair and new armoring (184 feet) on the right bank near the existing floodwall downstream of. t.he South Boeing Bridge. Approximately 10 percent of the 2,510 feet of existing bank stabilization on the left bank will be maintained and an additional 1,275 feet will be repaired (replaced). Stabilization on the left bank will consist of a rock toe with bioengineered upper slope, as allowed within the USAGE levee vegetation requirements, and the interstitial spaces of the rock toe will be filled with stream gravel and cobble dredge material. The maintenance and repair of the previousl{installed bank stabilization is nee.ded to prevent bank erosion and protect the structural integrity of the floodwalls that provide flood protection during, and following, the maintenance dredging activity. Proposed Mitigation Mitigation has been designed to offset unavoidable impacts caused by the proposed project. Proposed mitigation will include the following items. • Native Vegetation Plantings (on site). Native vegetation will be installed in riparian and channel fringe habitats where feasible, based upon hydraulic conditions and within guidelines for vegetation along levees and floodwalls set by USAGE. Native vegetation will be installed in the following locations: all temporarily impacted riparian areas; along the left bank above Ordinary High Water Mark (OHWM) in. areas outside the Vegetation Free Zone (VFZ); along vegetated benches along the left bank below OHWM; and in selected location.s along the right bank that have been identified to benefit from additional plantings. • Filling Vold Space In Rlprap (on site). Interstitial spaces in all bank stabilization work areas proposed as part of the project (new, repair and maintenance) will be filled with native dredge material to reduce voids that may harbor predatory fish species and to provide suitable substrate for riparian plantings where appropriate. • Lower Reach Gablon Removal (on site). Gabion bank protection currently exists along the right bank within Reach 1 (downstream of South Boeing Bridge). Removal of the gabions and replacement with bioengineered bank stabilization measures (composed of a rock toe, geogrid reinforced soil lifts and plantings), is proposed to improve nearshore habitat conditions and restore bank stabilization function. The proposed improvement work is located near channel STA 22+25 and is 100 LF long. • Spawning Channel Maintenance and Monitoring (off site). • The City will continue to maintain the existing Royal Hills Replacement Spawning Channel at approximately River Mile (RM) 3.5, as required by the original project 1997 EIS mitigation plan for the initial and future maintenance dredging. This will promote ongoing functional value and continue to compensate for impacts to spawning from the proposed maintenance project and future maintenance projects. • The City also intends to conduct maintenance of the Elliot Spawning Channel at approximately RM 4.7 to promote continued use by salmon for spawning as well as off-channel spawning and rearing habitat to mitigate for measured channel adjustment impacts. Continued maintenance and GEoENGJNEERS CJ File No. 0693-073-00 City of Renton March 18, 2015 page 6 operation beyond that point is voluntary and will continue unless ongoing excessive maintenance is required, it is frequently damaged, or significantly damaged in the future by floods resulting in a -. ----. -. . -. . --. ~ -. ---------. -- major or on-going need to repair or restore the channel. Specific maintenance actions that have been discussed with WDFW and the MIT are included in the proposed project action, as described more fully in the Mitigation Work Plan section of this document. • Lighting Impacts Reduction (on site and off site). The City will conduct an inventory of existing City-owned lights within the project area along the Cedar River including a 200-foot buffer on each side up to RM 2.1 upstream of 1-405. The inventory will provide data that can be used to develop the basis for a lighting study. The lighting study will identify City-owned lights thatcan be modified (direction, bulb type, shielding, removal, etc.) to reduce negative lighting impacts on the Cedar River habitat without compromising public· safety. Study recommendations will be prioritized and implemented to the greatest extent feasible. • Scour Monitoring Study. A scour monitoring study utilizing scour chains with accelerometers is currently being implemented with the following goals: 1) to evaluate bed material disturbance depths prior to the 2015 dredging, thus defining baseline sediment transport conditions, and 2) to monitor the magnitude, extent, and rates of bed adjustment over the two spawning/high flow seasons following the 2015 dredging. The City has completed the permitting and contracting, and the scour chains have been installed within the project reach for the 2014-2015 spawning and winter season. • Wetland Mitigation Bank Credits (off site). The City plans to mitigate wetland impacts through use of mitigation bank credits at the Springbrook Creek Wetland and Habitat Mitigation Bank. The Springbrook Creek Wetland and Habitat Mitigation Bank instrument was approved in August 2006. The site was constructed in 2007-2008 and allows an alternative to onsite mitigation for private and public projects (City or WSDOT) with wetland impacts that require mitigation per City Code to achieve a no-net loss of ---wetland functions and values. This wetland mitigation bank currently has sufficient credits available to offset wetland impacts of this project. Project Elements Consistent with Prior Approval The following proposed project elements are consistent with the original environmental documentation prepared for the project, including the Final EIS and SEPA approval by way of adoption. • Maintenance action associated with existing project • Project location and extent • Depth of dredging • Dredging methods and equipment types • Equipment access locations and material handling areas • Amount of material to be removed • Inclusion of bank stabilization elements to prevent erosion • Repair of existing stormwater outfalls • Spawning channel maintenance as mitigation for dredge impacts • Riparian plantings as mitigation for dredge impacts GEOENGINEERS C) File No. 0693 073-00 •• City of Renton March 18, 2015 Page 7 • In-water work window for protection of aquatic life (June 15 -August 31) Project Changes from Prior Approval • Advancements in dredging technologies, which will improve the accuracy of dredging activities, and promote adherence to the approved dredge design. This will reduce the environmental impacfof the project. • Disposal and possible reuse of dredge spoils. This will have no net effect on the environmental impact of the project, except as a beneficial effect where spoils will be reused on site to fill void spaces, reduce predatory fish habitat, and create habitat/planting benches. • Extent and locations of riparian plantings. This will have a beneficial net environmental impact because more extensive riparian plantings are proposed. • Listing of Puget Sound steelhead under the federal Endangered Species Act since the time of the previous dredge. The impact of dredging on this .species is generally consistent with the impact to Chinook salmon, which was evaluated as part of the 1998 project. Therefore, environmental impacts will be consistent with previously prepared environmental documentation. • Wetland impacts of 0.062 acres, which are proposed to be mitigated through purchase of Bank Credits. Mitigation will adequately offset project impacts, resulting in no net environmental impact. • Additional mitigation elements, including filling void spaces in riprap, removal of a section of existing . gabion basket, and lighting impacts reduction. These mitigation elements will have a beneficial environmental impact. SUMMARY AND CLOSURE The proposed Cedar River maintenance dredge project is proposed as part of the requirements of the 1998 Army Corps of Engineers Lower Cedar River Section 205 Flood Hazard Reduction Project. The proposed maintenance activities were identified in the original 1991 NEPA EIS for the project and were addressed in the regulatory approvals and mitigation planning for the 1998 dredge. The City has developed the proposed maintenance project based on the original approved designs of the 1998 project. The scope of the project remains the same, but the shoreline impacts from the left bank will be significantly reduced. At this time, the USACE has not made a decision on how they intend to fulfill NEPA obligations for the proposed maintenance project. The USACE has preliminarily indicated that they will not require a new EIS or supplement to the original EIS.They will likely prepare an addendum or Environmental Assessment (EA) related to the items that were not covered in the original Section 205 dredge project EIS as outlined in this letter. The information presented in this letter is intended to assist the City with the SEPA process by re- affirming the original NEPA/SEPA decision and identifying changes in the project and environment that are outlined above. These changes are minor and are a result of advancements in technology, necessary maintenance of flood structures, and additional mitigation voluntarily provided by the City. The changes are, therefore, not expected to create significant environmental impacts outside of what was analyzed in the original NEPA/SEPA documentation for the project. GEoENGINEERS CJ File No. 0693-073-00 City of Renton March 18, 2015 Pages Thank you for choosing GeoEngineers to continue to support the City with environmental permitting for this important flood control maintenance_ project. lfyou_ have any questions_aboutthe information presented herein, please contact Joe Callaghan at 253.383.4940. Sincerely, GeoEngineers, Inc. ,~- Associate Environmental Scientist DBC"OC:ab Attachments: Appendix A. Complete JAR PA Package cc: Shane Phillips, PE Coast & Harbor Engineering/Hatch Mott MacDonald .. _0J2 b cl:_ David B. Conlin, PWS Biologist/Project Manager Disclaimer. Any electronic form, facsimile or hard copy of the original document(emall, text, table, and/or figure), if provided, and any attachments are only a copy oftheoriglnal document The original document Is stored by GeoEngineers, Inc. and will serve as the official document of record. GEOENGINEERS CJ File No. 0693-073-00 APPENDIX A Complete JARPA Package Gc~9901 WASHINGTON STATE Joint Aquatic Resources Permit Application (JARPA) Form 1,2 lf.llif!il ~ ,-·-------------------------------~ ' ' AGENCY USE ONLY 1 US Anny Ccrpa of EnglnNra ,@ Seattle District USE BLACK OR BLUE INK TO ENTER ANSWERS IN THE WHITE SPACES BELOW. Part 1-Project Identification . ' : Date received: ' Agency reference#: Tax Parcel #(s): ---------- 1. Project Name (A name for your project that you create. Examples: Smith's Dock or Seabrook Lane Development) [!JgJ.ll) . . . Cedar River Maintenance Dredging Project Part 2-Applicant The person and/or organization responsible for the project. [!JgJ.ll) . 2a. Name (Last, First, Middle) . Straka, Ronald J. (PE), Surface Water Utility Engineering Supervisor .. 2b. Organization (If applicable) . . . . . City of Renton 2c. Mailing Address (Street or PO Box) . . 1055 S. Grady Way . 2d; City, State, Zip . Renton, Washington 98057 . . 2e. Phone (1) 2f. Phone (2) 2g. Fax 2h. E-mail . ( 425 ) 430-7248 ( ) ( 425 ) 430-7241 rstraka@rentonwa.gov 1Additional forms may be required for the following permits: • If your project may qualify for Department of the Army authorization through a Regional General Permit (RGP), contact the U.S. Army Corps of Engineers for application information (206) 764~3495. • If your project might affect species listed under the Endangered Species Act, you will need to fill out a Specific Project Information Form (SP1F) or prepare a Biological Evaluation. Forms can be found at http://www.nws.usace.army.mil/Missions/CivilWorks/Regu!atory/PermitGuidebook/EndangeredSpecies.aspx. • Not all cities and counties accept the JARPA for their local Shoreline permits. If you need a Shoreline permit, contact the appropriate city or county government to make sure they accept the JARPA. 2To access an online JARPA form with [helpJ screens, go to http:/fwww.epermitting. wa.qov/site/alias resou rceOOnter/jarpa jarpa form/9984/iarpa form. aspx. For other help, contact the Governor's Office of Regulatory Assistance at 1-800-917-0043 or help@ora.wa.gov. JARPA Revision 2012.1 Page 1 of 20 ' ' ' ' ' ' Part 3-Authorized Agent or Contact Person authorized to represent the applicant about the project. (Note: Authorized agent(s) must sign 11 b of this application.) lli!mll 3a. Name (Last, First, Middle) Callaghan, Joseph 0. (PWS) . 3b. Organization (If applicable) . GeoEngineers, Inc. . . 3c. Mailing Address (Street or PO Box) 1101 South Fawcett Avenue, Suite 200 . 3d. City, State, Zip Tacoma, Washington 98402 3e; Phone (1) 3f. Phone (2) 3g. Fax · 3h. E-mail . . ( 253 ) 383-4940 ( } ( 253 ) 383-4923 jcallaghan@geoengineers.com . . . . Part 4-Property Owner(s) Contact information for people or organizations owning the property(ies) where the project will occur. Consider both upland and aquatic ownership because the upland owners may not own the adjacent aquatic land. lli!mll r8] Same as applicant. (Skip to Part 5.) r8] Repair or maintenance activities on existing rights-of-way or easements. (Skip to Part 5.) D There are multiple upland property owners. Complete the section below and fill out JAR PA Attachment A for each additional property owner. r8] Your project is on Department of Natural Resources (DNR)-managed aquatic lands. If you don't know, contact the DNR at (360) 902-1100 to determine aquatic land ownership. If yes, complete JARPA Attachment E to apply for the Aquatic Use Authorization . . 4a. Name (Last, First, Middle) 4b. Organization (If applicable) . 4c. Mailing Address (Street or PO Box) . 4d. City, State, Zip . 4e. Phone (1) 4f. Phone (2) 4a, Fax 4h. E-mail . ( ) ( ) ( ) JARPA Revision 2012.1 Page 2 of 20 Part 5-Project Location(:_, Identifying information about the property or properties where the project will occur. ~ D There are multiple project locations (e.g. linear projects). Complete the section below and use JARPA Attachment B for each additional project location. Sa. Indicate the type of ownership of the property. (Check allthat apply.) ·ll:1.filru . . D Private D Federal [8J Publicly owned (state, county, city, special districts like schools, ports, etc.) D Tribal 0 Department of Natural Resources (DNR) -managed aquatic lands (Complete JARPA Attachment E) Sb. Street Address (Cannot be.a PO Box. If there is no address, provide other location information in 5p.) [!)mQ] N/A Sc. City, State, Zip. (If the project is not in a city or town, provide the name of the nearest city or town.) .~ . Renton, Washington 98057 . Sd; County. ll:1lillll . . . . King . Se. Provide the section, township, and range for the project location. ~ % Section Section Township Range NW 17 23N • 05E NE 18 23N 05E SE, NE 7 23N 05E Sf. Provide the latitude and longitude of the project location. ll:1lillll • Example: 47.03922 N lat./ -122.89142 W long. (Use decimal degrees -NAD 83) Upstream project limit: (Williams Ave Bridge): 47.484361 N lat./ -122.206477 W long. Downstream project limit: (North Boeing Bridge): 47.50048 N lat./ -122.21589 W long. Sg. List the tax parcel number(s) for the project location. ll:1.filru • The local county assessor's office can provide this information . 072305-HYDR, 182305-HYDR, 172305-HYDR . ~ Sh. Contact information for all adjoining property owners. (If you need more space, use JARPA Attachment C.) ~ . See Attachment C. Si.· List all wetlands on or adjacent to the project location. ll:1.filru River conditions have been altered as a result of channel construction, levee construction, bank armoring and other structures. The channel is generally linear without meanders and the bank of the river is defined by levees, flood walls, and riprap. However, several riverine wetlands (vegetated sand and gravel bars) that have formed since the last dredge in 1998 have been identified in shallow areas below the OHWM of the Cedar River within the project reach. One additional depressional wetland has been identified within the floodplain but is above the OHWM. • Wetland A: Category Ill, Riverine, 3,404 square feet, east bank approximately 1,300 feet upstream from Lake Washington. • Wetland B: Category Ill, Depressional, 1,834 square feet, east bank approximately 2,300 feet upstream from Lake Washington. JARPA Revision 2012.1 Page 3 of 20 . • -Wetland C: Category Ill, Riverine, 1,719 square feet, east bank approximately 80 feet downstream from the South Boeing Bridge. • Wetland D: Category IV, Riverine, 1,915 square feet, west bank just upstream from the South Boeing Bridge. • Wetland E: Category IV, Riverine, 795 square feet, west bank just upstream from the South Boeing Bridge. • Wetland F: Category 111, Riverine, 1,618 square feet, east bank roughly parallel to the Renton Stadium track. • Wetland G: Category Ill, Riverine, 476 square feet, east bank roughly parallel to the Renton Stadium track . 5j. List all waterbodies (other than wetlands) on or adjacent to the project location. [!]mQ] . Cedar River is the dominant river feature and the downstream outlet is Lake Washington. 5k. Is any part of the project area within a 100-year floodplain? [!]mQ] ~Yes 0No D Don't know . . 51. Briefly describe the vegetation and habitat conditions on the property. [!]mQ] Vegetation below the OHWM is generally limited to riverine wetland areas at the channel margin, which are dominated by reed canarygrass with some yellowflag iris. Riparian vegetation includes Japanese knotweed, Himalayan blackberry, Scotch broom, .tansy, butterfly bush, field bindweed, English ivy, native willows, big leaf. .. maple, red alder, and horsetails. Much of the riparian buffer on the east bank (river right) is affected by park landscaping including mowed grass and the native shrubs including Nootka rose, black twinberry, Oregon grape, Pacific ninebark and other species. The river within the project reach has levees and floodwalls on both sides for flood protection. Banks have been armored with a flood wall, riprap, concrete rubble, and/or gabion baskets. Much of the armoring is currently failing. Riverbed sediment consists primarily of cobbles, gravels and with a small fraction of finer materials (sand and silt). 5m. Describe how the property is currently used. ~ _ Cedar River is a dredged channel that has been actively maintained for the last century as a flood control facility to reduce the effects of flooding on adjacent properties including the Renton Municipal Airport, The Boeing Company 737 production facilities, and a public park. The river is frequented by salmon, trout, and a wide variety of birds and other wildlife. Extensive park facilities, including a paved pedestrian pathway, are present on the east bank (river right) within the project reach, as well as on the west bank (river left) between the Logan Ave and Williams St bridges. These facilities provide opportunity for nature enjoyment by the general public. There is al_so a boat launch within the project reach for use by non-motorized watercraft only . . 5n. Describe how the adjacent properties are currently used. ~ Adjacent properties include the Renton Municipal Airport, public park lands, Boeing facilities, two apartment/condominium buildings, Renton Senior Center, retail restaurant, and a small industrial business. So. Describe the structures (above and below ground) on the property, including their purpose(s) and current condition. [!]mQ] Bank stabilization consisting of riprap, concrete rubble, timber bulkheads, and gabion baskets exists along much of the shoreline. The property also includes flood control levees and concrete floodwalls on either side of the river, a total of four bridges over the river, and a public trail. A portion of the public trail composed of concrete and bricks is located immediately adjacent to the river. The downstream two bridges (North and South Boeing Bridges) connect Boeing facilities with the airport, are not accessible to the public, and are maintained by Boeing. The upstream two bridges are public street bridges for Logan Ave and Williams St. Numerous outfalls discharge from both sides into the river at or near the shoreline. Sewer, water and other utilities (e.g., compressed air) are buried under the. river bed in multiple locations within the project area. Overhead power lines cross the river between North and South Boeing Bridges, and at Logan Ave. . JARPA Revision 2012.1 Page4 of20 Sp. Provide driving directions fro _he closest highway to the project locauon, and attach a map. ~ From the interchange between 1-405 and SR-167 in Renton, travel north on SR-167/Rainer Ave S 1.2 miles to Airport Way. Turn right (east) onto Airport Way, which curves and becomes Logan Ave N after 0.4 miles. In less than 200 feet, Logan Ave N crosses the Cedar River near the upstream limit of the project (the upper end of the project is at the Williams Ave S bridge, approximately 1,000 feet upstream to the southeast). The lower reach of the project is accessible from E Perimeter Road on the west bank, which branches from Logan Ave Sat the southwest end of the Logan bridge, as well as from Nishiwaki Lane on the east bank, which cari be accessed from N. 61h Street approximately 0.5 miles further north on Logan Ave. Part 6-Project Description . . 6a. Briefly summarize the ove.rall project. You can provide more detail in 6b. ~ . Maintenance dredging will be performed to maintain the project flood protection benefits, as required in the Project Cooperation Agreement (PCA) Operation & Maintenance Manual between the City of Renton and the U.S. Army Corps of Engineers (USAGE 2004). The threshold for periodic maintenance dredging is based on ensuring flood protection against the 100-year recurrence interval event, with at least 90 percent reliability. As the bed approaches the specified allowable elevation (Allowable Average Channel Bed Profile per USAGE 2004), anywhere within the project, provisions are to be made for channel dredging to maintain the design level of protection. During maintenance dredging actions, the Cedar River channel within the project area will be excavated to a depth of approximately 4 feet on average below the "Allowable Average Channel Bed Profile" as defined in the PCA. The transition slope area will extend from Logan Ave. upstream to Williams Avenue. The maximum transition area slope will be approximately 0.63%. Transition slope will gradually reduce the dredge cut from the designed dredged channel bottom at Logan Avenue upstream to Williams Avenue where it will meet the existing river bed level. The proposed maintenance dredge action is similar in scope (depth and plan extents) to the Corps of Engineers 205 project that was permitted in 1998, which also included maintenance dredging. The project extents (width and depth of the dredge cut) along the river (North Boeing Bridge to Williams Avenue, or Station 0+00 to 64+85) will be slightly smaller than the 205 project proposed and constructed in 1998 (dredging will actually terminate downstream of Williams Avenue, at Station 64+37.65). The dredge depth will strictly adhere to the average depth of 4 feet (below allowable average channel bed profile) with a 1-ft over- dredge allowance and will not exceed the. depths permitted in the 1998 project. The total volume of dredged material is estimated to be approximately 125,000 cu yds including contingency for sediment accumulation between the May 2013 channel survey and the conditions at the time of the proposed dredging in 2015 (average accumulation of 9,700 cy per year in project area). For discussion purposes, the river is segmented into three reaches: 1. North Boeing Bridge to South Boeing Bridge (Stations 0+00 to 39+00) 2. South Boeing Bridge to Logan Ave. (Stations 39+00 to 56+00) 3. Logan Ave. to Williams Ave. (Stations 56+00 to 64+85) Width of the maintenance dredging will vary depending on location within the project area. The channel bottom cut will be 90 feet wide at the north in Reach 1, narrowing in intervals along the project length to 60 feet channel width at the upstream limit in Reach 3. Dredge widths have been narrowed relative to the 1998 dredge to prevent undermining of existing flood control structures and river banks. Dredged side slopes will be 3H:1V unless otherwise required for local bank stabilization maintenance work or if required for geotechnical or structural stability of existing infrastructure (Bridges and I-Walls). Bank stabilization work is proposed as an element of maintenance of the USAGE 205 Flood Control project. Bank stabilization is limited to those areas of the flood control project requiring stabilization (levees and floodwalls) based upon engineering analysis and design standards set forth by USAGE. Bank stabilization for non-essential flood control project features are not proposed as part of this project. Bank stabilization work is composed of the following types of work: JARPA Revision 2012.1 Page 5 of 20 • Maintenance -Minor restora,1on of portions of displaced rock on existing bank stabilization features while access to the areas is provided during the dredging work • Repair -Replacement and reconstruction of existing deteriorated and failing bank stabilization features • New Stabilization -Installation of new stabilization measures to ensure protection of flood control I-Walls and levees -------- Numerous stormwater outfalls (both active and abandoned) are located within the project area and consist of various sizes and types including concrete, plastic, and corrugated metal. Of these outfalls, approximately 20 are fitted with backflow prevention devices (tideflex valves) to protect upland areas against river flooding. As part of the work and in conjunction with dredging and bank stabilization, repair to damaged outfalls will occur. Because the river has continued to accumulate sediment some existing outfalls are buried and may require local excavation to uncover, assess, and refit damaged backflow prevention valves and pipes. Maintenance of existing ouifalls will included in-kind replacement of existing damaged or deteriorated systems including tideflex valves and sections of outfall pipe. Removal of accumulated sediment from active outfalls may be performed as needed. It is estimated that up to 30 outfalls may require some level of repair and maintenance, but this number will not be known until during construction. Where active outfalls pass through bank stabilization (repair, maintenance, or new) modifications of the outfall location may be required by extending or cutting off outfall pipe to match proposed site conditions. Damaged pipes that penetrate through the existing floodwalls will require replacement and refitting as necessary. Abandoned exposed outfalls extending into the river will be cut-off and disposed of offsite, as feasible, when encountered. Due to the accumulation of sediments along the lower reach of the river, the exact number of damaged and exposed outfalls will not be known until construction begins. - 6b. Describe the purpose of the project and why you want or need to perform it. ~ - The US Army Corps of Engineers (USAGE) Lower Cedar River Section 205 Project (the project) is a Flood Hazard Reduction Project located in and along the lower 1.23 miles (2000 m) of the Cedar River in Renton, Washington. The project consists of an actively maintained (dredged) river channel, and system of levees and floodwalls that provide protection to the lower river and its extensive industrial and commercial development, including the Renton Municipal Airport and the Boeing Company facility. Following the most recent dredging operation performed in 1998 by USAGE, the river bed has continued to fill with native river sediment composed primarily of gravel as expected and identified as part of the original 1998 project permitting and design. Continued deposition in the river channel is expected to reduce the level of flood protection below the required 100-year flood recurrence event of the project flood protection system in the next two to three years, or sooner. Therefore, the City has initiated the planning and preliminary design for maintenance dredging of the river and other necessary maintenance actions to obtain construction permits with sufficient time to maintain the 100-year flood protection, as required by the Project Cooperative Agreement (PCA) between the City and USAGE. Maintenance dredging will take place within the limits and grades of previous dredging work as permitted within the original National Environmental Policy Act (NEPA) Environmental Impact Statement (EIS). 6c. Indicate the project category. (Check all that apply) ~ D Commercial D Residential D Institutional D Transportation C8J Maintenance D Environmental Enhancement - 6d. Indicate the major elements of your project. (Check all that apply) [help] D Aquaculture C8J Bank Stabilization D Boat House D Boat Launch JARPA Revision 2012.1 D Culvert D Dam/Weir C8J Dike / Levee / Jetty D Ditch D Float D Floating Home D Geotechnical Survey D Land Clearing D Recreational D Retaining Wall (upland) 0Road Page 6 of 20 Boat Lift D Bridge D Bulkhead 0Buoy D Channel Modification . D Other: U k/ Pier 1ZJ Dredging D Fence D Ferry Terminal D Fishway ~ LJ Marina / Moo. _"e · D Mining IZ! Outfall Structure D Piling/Dolphin D Raft . Scientific Measurement Device D Stairs D Stormwater facility D Swimming Pool D Utility Line 6e. Describe how you plan to construct each project element checked in 6d. Include specific construction methods and equipment to be used. [!]§!lll • Identify where each element will occur in relation to the nearest waterbody. • Indicate which activtties are within the 100-year floodplain. The project includes the following three primary elements: (1) Maintenance Dredging; (2) Bank Stabilization; and (3) Outfall Repairs. These are described in detail below. Maintenance Dredging Maintenance dredging work for the flood control project will be conducted utilizing a combination of land- based (excavator method) and water-based (floating dredge method) mechanical dredging equipment. Land- based dredging operations will occur from temporary in-channel gravel berms and from floating equipment, depending on the location of dredging and water levels present at the time of construction. Dredging work will be conducted to the lines and grades as shown on the plans. The extent of dredging will be monitored by GPS positioning equipment and visible stakes as necessary to verify that the dredging work stays within the planned limits. The approach to conducting the work will be to focus the majority of work activities (including access) along the left bank for the entire project reach. The right bank uplands and riverbank contains significantly more infrastructure (levee, floodwalls, park, trails, roads and public access) and habitat (native riparian vegetation) than along the left bank. Access points on the right bank will be limited, but some are required to construct bank stabilization improvements, mitigation features, and launch water-based equipment. These access points have been identified in areas ofexisting or proposed disturbance (including at the boat ramp [near Sta. 7+60], at the gabion replacement area [Sta. 22+25], at 61h Street [Sta. 31 +80], and on the north side of Logan Avenue [Sta. 56+00]) to reduce impacts to existing riparian vegetation. Floating Dredge For water-based dredging, it is expected that the type of equipment utilized will be an excavator or crawler crane mounted on a portable sectional barge (such as a flexi-float system). The sectional barge will be mobilized to the site by truck, assembled, and launched either at the existing boat ramp on the right bank or at another nearby left bank staging area. The barge and excavator system will be moved around the dredging work area using a small transportable tug boat suitable for use in shallow water environments. The barge will be secured to the riverbed prior to dredging using spuds in the riverbed or anchor lines in the river. Dredged material will be removed from the river bottom using either an excavator digging bucket or clamshell bucket. The bucket will place the dredged material onto a material barge, which will be fitted with side boards and filter fabric to contain the dredged material and filter fine materials. Initial dewatering is accomplished while material is on the barge deck as excess water is filtered and returned to the river. After completion of material barge loading, the loaded barge will be transported by small tug to the material offload facility which will be at up to two locations along the left bank of the project site. Offload areas will be located within areas which allow access from the adjacent uplands and limit impacts to existing riparian habitat and flood control infrastructure. Temporary construction of an unloading platform will be required to unload dredged material from the barge, re-handle the material, and load into trucks or place in a small stockpile located in the adjacent uplands. The unloading platform will be composed of steel pile (vibratory driven sheetpile, pipe pile) or other similar temoorarv shorino method that can be fullv removed after dredoino activities (such as ecoloov blocks, rock, JARPA Revision 2012.1 Page 7 of 20 large polypropylene sacks filled w1u, soil/gravel, or similar). Native riverbea material consisting of dredged gravel and cobbles will be placed between the existing slope and steel pile to maintain a platform suitable for excavators to unload the barge. The platform will be disassembled after completion of floating dredge operations and impacted areas (levees, vegetation) restored, which may require minor earthwork. The upland stockpile will be protected against erosion using standard BMPs as identified in the Temporary Erosion and Sediment Control (TESC) Plan. The access platforms will be located along the left bank at approximately Sta. 8+50, 14+50, and 17+00. Excavator Dredge Dredging work will also be conducted utilizing land-based equipment operated from temporary gravel berms and removable construction platforms located in the river channel below Ordinary High Water. Excavator dredge operation will consist of a combination of multiple tracked excavators, crawler cranes, front end loaders, bulldozers and dump trucks. This approach will require the land-based equipment to. access the river channel from the uplands at designated locations near the bridges (South Boeing Bridge Sta. 39+00, Logan Avenue Sta. 56+00). A total of 17 access points are anticipated to be required along the left bank of the project site with each being approximately 50 to 75 ft in length. Four access points along the right bank might be needed for the dredging and or bank stabilization work. These will include disturbed areas located at the boat ramp (near Sta. 7+60), at the gabion replacement area (Sta. 22+25), at 5th Street (Sta. 31+80), and on the north side of Logan Avenue (Sta. 56+00). The boat ramp may also be used for launching work boats and survey vessels. The stadium parking lot access will only be used if absolutely necessary to complete right bank work between South Boeing and.Logan Avenue Bridges. The work will be initiated within the upper reach between Logan and Williams Avenue Bridges. The excavator method will require the use of native dredged gravel and cobble material to build a temporary working platform or berm/bench which has a top elevation above the anticipated river water level. To initiate the work, a limited amount of imported temporary fill may be needed at the access point and berm at the toe of the access point. The temporary berm will be stream bed type material similar in size and character to the existing channel substrate either taken from the floating dredge operation or from an approved offsite sand and gravel operation. Once excavation equipment is mobilized into the river channel, bed material will be dredged and placed within the left bank side of the channel to create a temporary berm to serve as a working platform for construction equipment. Temporary berm will be constructed of material excavated from the bed material located immediately adjacent to berm area as well as material removed from Reach 1 area if needed to start the berm feature. The temporary berm will be removed as the dredging work progresses in a downstream direction. Material removed from the channel and temporary berm will be loaded into trucks and transported to rehandling areas at access points. Rehandling areas will be constructed using dredge material to provide a ramp and bench for equipment to transfer materials from the channel side over the flood control . structures (I-Wall and Levee) into trucks located along the adjacent access roads (Airport and Frontage Road). Rehandling areas will be removed after completion of dredge operations and impacted areas (levees, vegetation) restored, which may require minor earthwork. Bank Stabilization Multiple excavators and trucks will be used to construct the bank stabilization features. Imported rock and soil materials will be delivered to temporary work platforms by truck, rehandled and then placed using excavators. Bank stabilization work will be conducted in coordination with and at the same time as the maintenance dredging work as each reach of channel is completed. Slight differences in construction methods for the three types of proposed bank stabilization are summarized below. Maintenance Minor maintenance of existing bank stabilization features will be performed by removing damaged and displaced stones, Armorflex blocks, and reconstruction of small affected sections as needed to restore continuous bank protection, from toe to top of slope, along the project. The work will include importing some stones to fill gaps of displaced materials (stones and blocks), excavation, and demolition of short portions of existing bank. To the extent possible, existing slopes and geometries will be maintained and the overall footprint will not be increased compared to existing conditions. Upon completion of maintenance rock placement, native gravel/cobble (obtained from maintenance dredging work) will be placed on the slopes to fill voids in the bank protection where maintenance activities take place. JARPA Revision 2012.1 Page 8 of 20 Repair In repair areas where the bank stabilization will be reconstructed or replaced, bank stabilization will be composed of angular rock placed at a 2H:1V slope. The stabilization will be constructed as the temporary construction berm or platform is removed. The existing bank stabilization will be removed and disposed offsite. A suitable subgrade will be established using excavators. Geotextile fabric will then be placed on the excavated slope, and small bedding stone (quarry spalls) will then be placed on the geotextile fabric to secure • it in place. Armor rock will then be placed and compacted to form a tight fitting mass of stone working form the toe to the top of the slope. A narrow bench at the top of the slope will be constructed where space is available. Voids in the finished rock slope will be filled with native gravel/cobble dredge materials. A soil/gravel mixture will also be placed on top of the rock in the vegetation free zone (within 15 feet of the floodwall and levee prism) for establishment of native herbaceous vegetation. The mixture will be primarily · composed of native riverbed material from dredging operations, mixed with imported topsoil to promote plant establishment and growth. On the left bank, from Station 37+15 to Station 41 +90, a narrow habitat/planting bench will be retained to provide suitable areas for establishment of inundation tolerant riparian vegetation such as willows or other appropriate species. Plantings will be located such that they are in conformance with guidelines for vegetation near federal levees and floodwalls (ETL 1110-2-571, Guidelines for Landscape ~.Planting & Vegetation Management at Levees, Floodwalls, Embankment Dams, and Appurtenant Structures, · ·2009; Seattle Variance, PL 84-99 Levee Vegetation Management Information Paper, 1995). New '1lank erosion has occurred along the toe of the floodwall that was constructed by the USAGE without any ' ·bank stabilization measures. The design team identified one location where the erosion is a risk to the ~ii¢r.uctural stability of the floodwall. New bank stabilization will be constructed at this location in a manner 'similar to the Repair areas, except that removal of existing bank stabilization will not occur. The new bank · ~bilization will be limited to 240 linear feet along the right bank of the river near station 30+66. For new stabilization on the right bank, temporary construction platforms may span across the river from the left bank :W aHow access to the work area for both excavation and construction of the bank stabilization. This will limit ~rparian impacts and protect the existing floodwall (I-wall). Access from uplands at 5th Street will also be required. Platforms will be removed upon completion of the bank stabilization and dredging and the area will be restored to pre-disturbance contours. Outfall Repairs ,.Numerous stormwater outfalls (both active and abandoned) are located within the project area and consist of ~-i,arious sizes and types including concrete, plastic, and corrugated metal. Of these outfalls, approximately 20 ··are fitted with backflow prevention devices (tideflex valves) to protect upland areas against flooding. • As part of the work and in conjunction with dredging and bank stabilization, maintenance and repair to damaged outfalls will occur. Because the river has continued to accumulate sediment some existing outfalls · are buried and may require local excavation to uncover, assess, and refit damaged backflow prevention valves and pipes. · Maintenance of existing outfalls will included in-kind replacement of existing damaged or deteriorated systems including tideflex valves and sections of outfall pipe. Removal of accumulated sediment from active outfalls may be performed as needed. It is estimated that up to 30 outfalls may require some level of repair and maintenance. . Where active outfalls pass through bank stabilization (repair, maintenance, or new) modifications of the outfall location may be required by extending or cutting off outfall pipe to match proposed site conditions. Where pipe penetrations through the existing floodwalls are damaged, pipe replacement and refitting will occur. Abandoned exposed outfalls extending into the river will be cut-off and disposed of offsite, as feasible, when encountered . BMPs will be implemented to isolate the repair areas prevent pipe repair materials from entering the water durina construction. JARPA Revision 2012.1 Page 9 of20 6f. What are the anticipated start and end dates for project construction? (Month/Year) (h§!Q] • If the project will be constructed in phases or stages, use JARPA Attachment D to list the start and end dates of each phase or stage. . . Dredging activities will be conducted during: Start date: June 15 2015 End date: August 31, 2015 D See JARPA Attachment .. ;:-.: D 6g. Fair market value of the project, including materials, labor, machine rentals, etc. (h§!Q] $7,800,000 6h. Will any portion of the project receive federal funding? (h§!Q] • If yes, list each agency providing funds . . . D Yes · (g] No D Don't know Part 7-Wetlands: Impacts and Mitigation (g] Check here if there are wetlands or wetland buffers on or adjacent to the project area. (If there are none, skip to Part 8.) (h§!Q] . 7a. Describe how the project has been designed to avoid and minimize adverse impacts to wetlands. (h§!Q] D Not applicable .. Wetlands within the project area consist of seasonally vegetated sand and gravel bars in shallow areas below , OHWM and one depressional wetland within the floodplain, but above the OHWM. Where possible, the dredge prism has been designed to avoid riverine wetlands. Only two of the seven wetlands identified in the .. project area will be impacted by the dredging operation. The two wetlands that will be impacted (dredged) consist of vegetated gravel bars that are transient in nature and contain sparse vegetation on a seasonal ' basis. These two wetlands (Wetlands D & E) are located near the left bank of the river upstream of South Boeino bridge. 7b. Will the project impact wetlands? (h§!Q] 0Yes 0No D Don't know . 7c. Will the project impact wetland buffers? (h§!Q] '.· . 0Yes 0No D Don't know . - 7d. Has a wetland delineation report been prepared? (h§!Q] . • If Yes, submit the report, including data sheets, with the JARPA package . 0Yes D 7e. Have the wetlands been rated using the Western Washington or Eastern Washington Wetland Rating System? (h§!Q] • If Yes, submit the wetland rating forms and figures with the JARPA package . (g] Yes 0No D Don't know 7f. Have you prepared a mitigation plan to compensate for any adverse impacts to wetlands? (h§!Q] • If Yes, submit the plan with the JARPA package and answer 7g . • If No, or Not applicable, explain below why a mitigation plan should not be required . 0Yes 0No D Not applicable . ' . See attached Mitigation Plan. JARPA Revision 2012.1 Page 10 of 20 7g. Summarize what the mitigatio,, plan is meant to accomplish, and descrioe how a watershed approach was used to design the plan. !.!:~!Ill ' Wetlands that will be impacted are transient features consisting of seasonally vegetated gravel bars that shift in extent and location through time. It is anticipated that similar features will develop after dredging. Impact to wetlands are therefore considered temporary. Nonetheless, mitigation is proposed for impacts to these small areas at standard ratios. Mitigation for impacts to vegetated gravel bars that have developed within the channel since the previous dredge will be mitigated through use of wetland and habitat mitigation bank credits at the Springbrook Creek site. The Springbrook Creek Wetland and Habitat Mitigation Bank instrument was approved in August 2006. The site was constructed in 2007-2008 as an alternative to on-site mitigation for private and public projects (City or WSDOT) with wetland impacts that require mitigation per City Code to achieve a no-net loss of wetland functions and values. 7h. Use the table below to list the type and rating of each wetland impacted, the extent and duration of the impact, and the type and amount of mitigation proposed. Or if you are submitting a mitigation plan with a similar table, you can state (below) where we can find .this information in the plan. ~ I Wetland Activity (fill, Wetlan Wetland type Impact Duration of Proposed mitigation drain, excavate, d and rating area (sq. impact3 mitigation area (sq. ft. flood, etc.) Name1 category 2 ft.) . type• or acres) Dredge and fill D Riverine; IV 1,915SF Temporary See7g 2,872.5 SF ( construction ( construction (1.5:1 ratio) benches, bank benches); stabilization, and Permanent (bank . planting stabilization and . substrate) olantin!'.l substrate) Dredge and fill E Riverine; IV 795SF Temporary See7g 1,192.5 SF ( construction ( construction (1.5:1 ratio) benches and benches); planting Permanent (planting substrate) . .• substrate) 1 If no official name for the wetland exists, create a unique name (such aS ~wetland 1 "). The name should be consistent with othe·r project documents, such as a wetland delineation report. 2 Ecology wetland category based on current Western Washingto_n or Eastern Washington Wetl_and Rating System. Provide the wetland rating forms with-the JARPA package. 3 Indicate the days, months or years the wetland will be measurably impacted by the activity. Enter ~permanent" if applicable. 'Creation (C), Re-establishmenVRehabilitation (R), Enhancement (E), Preservation (P), Mitigation Bank/In-lieu fee (B) . Page number(s) for similar information in the mitigation plan, if av.ailable: see 12ages 17 and 28 7i. For all filling activities identified in 7h, describe the source and nature of the fill material, the amount in cubic vards that will be used, and how and where it will be olaced into the wetland. thelnl Temporary wetland fill in the amount of approximately (510 CY) will result from construction of the temporary berms for land-based dredging. This fill will include native excavated sandy gravel/cobble material and may also include a limited amount of imported sandy gravel/cobblefill. Permanent fill in the amount of 2 CY will result from bank stabilization repair. This fill will include geotextile fabric, small bedding stone (quarry spalls), and armor rock. Voids in the rock will be filled with native gravel cobble and then a soil/gravel mixture will be placed at the final grade to provide a substrate for native riparian vegetation plantings. Total fill associated with planting substrate that will be placed into the wetlands amounts to approximately 50 CY. 7j. For all excavating activities identified in 7h, describe the excavation method, type and amount of material in cubic yards you will remove, and where the material will be disposed. ~ Dredging work that will affect wetlands will be completed using an excavator, as described in Section 6e. The total estimated volume of dredged material that will be removed from the project area is estimated at less than 125,000 CY. A very small fraction of this will be rernoved from within the wetlands, as outlined in Table 7h. Management of dredged material will be based on the results of physical (grain size) and chemical (results of sediment sampling and analysis plan) characteristics. The proposed dredge material reuse and disposal locations include the following: JARPA Revision 2012.1 Page 11 of 20 • Onsite beneficial reuse , Filling interstitial void space of onsite rock stabilization structures. , Retention of habitat/planting bench features • Offsite Upland reuse -transportation to offsite location for beneficial re-use by others. • Upland landfill if deemed to not be suitable for beneficial upland reuse. Characterization of dredged materials proposed for both in-water and upland reuse will be conducted through a U.S. Army Corps approved sediment sampling and analysis plan (SAP), which will be developed and executed in accordance with the Dredge Material Management Program (DMMP) protocol. The SAP will include a description for vibracoring within the lower reach (where feasible) and grab sampling in the remainder of the project areas for sampling of dredge material taken from identified dredged material management units, conventional and chemical analysis of samples, and follow-up biological testing if determined to be required. Physical testing will consist of sieve analysis to determine suitability for beneficial onsite in-channel reuse and for reuse offsite in upland areas. The. results of the material characterization will be used for evaluation of all proposed reuse and disposal options. Re-handling of dredge material will occur at the designated re-handling areas for loading and trucking to a City approved upland facility. Part 8-Waterbodies (other than wetlands): Impacts and Mitigation In Part 8, "waterbodies" refers to non-wetland waterbodies. (See Part 7 for information related to wetlands.) [.bm!l] ~ Check here if there are waterbodies on or adjacent to the project area. (If there are none, skip to Part 9.) Sa. Describe how the project is designed to avoid and minimize adverse impacts to the aquatic environment. [.bm!l] . D Not applicable . JARPA Revision 2012.1 Page 12 of 20 Avoidance • Wetlands. The dredge prism has been designed to avoid impacts to most wetland areas identified in the project area. • Native Riparian Vegetation. No new equipment access points are proposed on the right bank, where native vegetation is present. Equipment will access the river from the left bank, where invasive vegetation is dominant, or from existing access points on the right bank that do not require vegetation removal. Bank protection work will be completed without removing mature native trees, if present, where feasible. • Bank Conditions. No new steel wire gabion structures are proposed for bank stabilization. Minimization • Riparian Vegetation Removal. Impacts associated with equipment access points and proposed bank work that require removal of invasive vegetation (native vegetation will generally not be removed, except for a few small native trees that will be removed from the left bank at access points) will be minimized by re-planting affected areas with native vegetative to the extent allowed by the USACE vegetation management standards (USACE Technical Letter No. 1110-2-571, April 10, 2009, "Guidelines for Landscape Planting and Vegetation Management at Levees, Floodwalls, Embankment Dams, and Appurtenant Structures" applies to left bank vegetation, and USACE Seattle District Information Paper PL 84-99, February 28., 1995, "Levee Vegetation Management" applies to the right bank vegetation). • Spawning Habitat. The project has been designed to minimize impacts to spawning areas to the maximum extent practical within constraints of project objectives. The dredge prism has been designed to result in similar flow depth and velocity characteristics as the existing pre-project condition in dense spawning areas, including the sub-reaches between Williams and Logan Avenue bridges and between Logan Avenue and South Boeing Bridges. The only sub-reach that is anticipated to be affected by alteration of flow depth and velocity is downstream of the South Boeing Bridge, which will have increased depth and reduced velocity due to the increased effect of backwater from Lake Washington. However, spawning in this reach occurs sporadically and in much lower densities than the other two reaches further upstream, and is generally limited to the channel margins. The dredge prism minimizes impacts to the channel margins and it is anticipated that some limited spawning may continue to occur in the lower reach and should increase with time following the dredge. • Channel Adjustment. Transition slope augmentation (roughened channel/grade control) was considered with the goal of improving channel stability and minimizing upstream impacts to redds during the first year after construction as a result of channel adjustment. However, it was determined that construction and risk associated with grade control outweighed the potential benefits. Allowing the channel to adjust naturally without grade control in the transition slope has been identified by the design team and regulatory agencies as the preferred option to minimize adverse impacts to in-stream habitat. • Predator Habitat. The effects of bank improvements on predator habitat will be minimized by infilling void spaces with dredged material to reduce predator habitat. Bank improvements include maintenance of existing riprap, repair of failing bank protection with new riprap, and installation of new riprap in areas previously vulnerable to erosion. • Bank Conditions. The effects of bank improvements on fish habitat conditions will be minimized by planting native vegetation where allowed by the Corps levee standards. • Construction BMPs/Sediment and Erosion Control. Equipment used for dredging or on/near water will be checked regularly to ensure no fluids are leaking. BMP's will be employed to prevent construction stormwater runoff from the uplands into the river. Work windows (June 15 through August 31) will be enforced to reduce the presence of migrating salmon. JARPA Revision 2012.1 Page 13 of20 ' Sb. Will your project impact a waterbody or the area around a waterbody? [!J.filQ] QYes D No Sc. Have you prepared a mitigation plan to compensate for the project's adverse impacts to non-wetland waterbodies? [!J.filQ] • If Yes, submit the plan with the JARPA package and answer 8d. • . If No, or Not applicable, explain below why a mitigation plan should not be required. Q Yes D No O Not applicable Sd. Summarize what the mitigation plan is meant to accomplish. Describe how a watershed approach was used to design the plan. • If you already completed 7g you do not need to restate your answer here. [!J.filQ] Detailed descriptions of proposed mitigation activities are included in the project Mitigation Plan and have been incorporated into the project design. The following mitigation activities are proposed to compensate for project impacts: • Vegetation Plantings. Native vegetation will be installed in riparian and channel fringe habitats where feasible based upon hydraulic conditions and within guidelines for vegetation along levees and floodwalls set by USAGE. Vegetation plantings include the following: • Temporarily Impacted Riparian Areas. Equipment access points and bank stabilization work areas that lack vegetation after construction is complete will be restored by installing native grass and low growing herbaceous vegetation within the Vegetation Free Zone (VFZ), and native shrub · vegetation in locations outside the VFZ. • Left Bank Above OHWM. The project team has identified areas along the left bank, above the OHWM, that are suitable for additional native riparian plantings based on the applicable VFZ. These areas will be cleared of invasive species prior to planting as needed. • Vegetated Benches Below OHWM. The project has been designed to accommodate gradually sloped benches along/near the left bank in select locations. These benches are located below the OHWM at the channel fringe and are expected to be subject to water level fluctuations within the range acceptable for appropriate plantings. The vegetated benches will resemble naturally occurring vegetated gravel bars similar to those that currently occur in some locations within the Cedar River. • Filling Void Space in Riprap. Interstitial spaces in all bank stabilization areas, proposed as part of the project (new, repair and maintenance), will be filled with native dredge material to reduce voids that may harbor predatory fish species and to provide suitable substrate for riparian plantings where appropriate. • Lower Reach Gabion Replacement. Gabions exist along the right bank within Reach 1 (downstream of South Boeing Bridge). Gabions were initially installed in 1976. to provide protection of the river bank but their condition has deteriorated. Removal of the gab ions and replacement with a soft bank bioengineered stabilization measure (composed of a rock toe, geogrid reinforced soil lifts and plantings), is proposed to improve nearshore habitat conditions and restore bank stabilization function. The proposed improvement work is located near channel Station 22+25. Spawning Channel Maintenance and Monitoring. The City will continue to maintain the existing Royal Hills Replacement Spawning Channel at approximately River Mile 3.5, as required by the original project 1997 EIS mitigation plan for the initial and future maintenance dredging. This will promote ongoing functional value and continue to compensate for impacts to spawning from the proposed maintenance project and future maintenance projects. The City will also continue to maintain the existing Elliot Spawning Channel at approximately River Mile 4.7 unless it is frequently damaged, or significantly damaged in the future bv floods resultino in a major or on-goino need to repair or restore the JARPA Revision 2012.1 Page 14 of 20 ' channel. The City will cons. vith the local habitat mangers prior to -· .y decision to discontinue maintenance or to not to repair/restore the Elliot Spawning Channel due to flood damages. • Lighting Impacts Reduction. The City will conduct a study to inventory existing City owned lights in the project area and along the Cedar River up to 1-405. The study will identify City owned lights that can be modified (direction, bulb type, shielding, removal, etc.) to reduce negative lighting impacts on the Cedar River habitat without compromising public safety. . Se. Summarize impact(s) to each waterbody in the table below. !.!ml Activity (clear, Waterbody Impact Duration of Amount of Area (linear ft.) dredge, fill, pile name1 location' impact' material (cubic of waterbody drive, etc.) yards) to be directly affected placed in or removed from . waterbodv Dredge Cedar In-Channel Bweeks Approximately Approximately River 125,000 CY 6,43B LF removed Temporary Cedar In-Channel B weeks 55,000 CY Approximately Construction River 6,43B LF . Berms . . Bank Stabilization Cedar In-Channel Permanent 740 CY Approximately ' (maintenance) River 10% of 2,510, or 250 LF Bank Stabilization . Cedar In-Channel Permanent B,630 CY Approximately (repair) River 1,275 LF Bank Stabilization . Cedar In-Channel Permanent 1,470 CY Approximately (new) River 240 LF 1 If no_ official name for the waterbody exists, create a unique name (such as "Stream 1"} The name should be consistent with other documents provided. 2 Indicate whether the impact will occur in or adjacent to the waterbody. If adjacent, provide the distance between the impact and the waterbody and indicate whether the impact will occur within the 1 QQ.year flood plain. 3 Indicate the davs, months or vears the waterbodv will be measurablv imoacted bv the work. Enter "oermanent" if annlicable. Sf. For all activities identified in Be, describe the source and nature of the fill material, amount (in cubic yards) you will use, and how and where it will be placed into thewaterbody. !.!ml . . Tem,2oraot. Construction Berms See 6e for description of construction methods and Be for fill volumes. Fill material for the temporary construction berms will include excavated gravel material from the channel and may also include a limited amount of imported gravel/cobblefill. Bank Stabilization Methods See 6e for description of construction methods and. Be for fill volumes. This fill will include geotextile fabric, small bedding stone (quarry spalls), and armor rock. Voids in the rock will be filled with native gravel cobble and then a soil/gravel mixture will be placed at the final grade to provide a substrate for native riparian veoetation olantinos. Sg. For all excavating or dredging activities identified in Be, describe the method for excavating or dredging, type and amount of material you will remove, and where the material will be disposed. !.!ml See 6e for description of construction methods, Be for excavation volumes, and 7j for disposal methods. JARPA Revision 2012.1 Page 15of20 Part 9-Additional lnforma11on Any additional information you can provide helps the reviewer(s) understand your project. Complete as much of this section as you can It is ok if you cannot answer a question 9a. If you have already worked with any government agencies on this project, list them below. ~ Agency Name Contact Name Phone Most Recent Date of Contact USAGE Suzanne Anderson (206) 764-3708 12/19/13 NOAA Fisheries Randy Mc lntosh (360) 534-9309 11/13/13 WDFW Larry Fisher ( 425) 313-5683 11/13/13 City of Renton Vanessa Dolbee (425) 430-7314 11/13/13 Muckleshoot Indian Holy Coccoli (253) 876-3360 11/13/13 Tribe Eric Warner (253) 876-3125 . . . . 9b. Are any of the wetlands or waterbodies. identified in Part 7 or Part 8 of this JARPA on the. Washington Department of Ecology's 303(d) List? ~ • If Yes, list the parameter(s) below . • If you don't know, use Washington Department of Ecology's Water Quality Assessment tools at: . httQ://www.eci.wa.gov/Qrograms/wg/303d/ . C8l Yes 0No Cedar River is listed as Category 5 for temperature, bacteria and dissolved oxygen within the project reach. It is listed as Category 2 for pH. Sediment data was unavailable on the Ecology website at the time of preparation of this application due to data quality issues. 9c. What U.S. Geological Survey Hydrological Unit Code (HUC)is the project in? ~ • Go to httQ://cfQub.eQa.gov/surf/locate/index.cfm to help identify the HUC . 17110012 -Lake Washington Watershed . 9d. What Water Resource Inventory Area Number (WRIA #) is the project in? ~ • Go to httQ:/lwww.eci.wa.gov/services/gis/maQs/wria/wna.htm to find the WRIA # . WRIA 8 -Cedar/Sammamish . 9e. Will the in-water construction work comply with the State of Washington water quality standards for turbidity? ~ • Go to httQ://www.eci.wa.gov/Qrograms/wg/swgs/criteria.html for the standards . ~Yes 0No D Not applicable 9f. If the project is within the jurisdiction of the Shoreline Management Act, what is the local shoreline environment designation? ~ • If you don't know, contact the local planning department • For more information, go to: httQ://www.eci.wa.gov/Qrograms/sea/sma/laws rules/173-26/211 designations.html. D Rural D Urban D Natural D Aquatic D Conservancy C8l Other High lntensit~ JARPA Revision 2012.1 Page 16 of 20 9g. What is the Washington Dep_, .ment of Natural Resources Water Type, ll:1fillil • Go to httg://www.dnr.wa.gov/BusinessPermitsfTogics/ForestPracticesAgglications/Pages/fg watertyging.asgx for the Forest Practices Water Typing System. ' ' ' ~ Shoreline 0Fish D Non-Fish Perennial D Non-Fish Seasonal 9h. Will this project be designed to meetthe Washington Department of Ecology's most current stormwater ma nu al? ll:1fillil • If No, provide the name of the manual your project is designed to meet. ~ Yes D No Sediment and erosion control will be done in accordance with the 2009 King Count)l Stormwater Design Manual, which is an eguivalent manual to Ecolog)l's. Name of manual: 2_009 King County Stormwater Design Manual 9i. Does the project site have known contaminated sediment? ll:1fillil ' • If Yes, olease describe below. ' ' ' ', - ' ' 0Yes ~No 9J. If you know what the property was used·for in the past, describe below. ll:1fillil ' . The channel is of artificial origin and now conveys the Cedar River from its natural channel into Lake Washington (it formerly flowed into the Black River and Duwamish River). The channel is a constructed channel that has been dredged regularly over the past century to maintain adequate flood flow conveyance. Adjacent properties are used orimarilv for industrial operations and public oark access. ' 9k. Has a cultural resource (archaeological) survey been performed on the project area? ll:1fillil • If Yes, attach it tocyour JARPA package . '' ' ~Yes 0No ' 91. Name each species listed under the federal Endangered Species Act that occurs in the vicinity of the project area or might be affected by the proposed work. lhfillll Puget Sound Chinook salmon, Puget Sound steelhead and Coastal/Puget Sound bull trout occur in the Cedar River. 9m. Name each species or habitat on the Washington Department of Fish and Wildlife's Priority Habitats and Species List that might be affected by the proposed work. lhfillll In addition to the fish species listed above, coho and sockeye salmon, and coastal resident cutthroat trout occur in the Cedar River. Part 10-SEPA Compliance and Permits Use the resources and checklist below to identify the permits you are applying for. • Online Project Questionnaire at http://apps.ec)l.Wa.gov/opas/. • Governor's Office of Regulatory Assistance at (800) 917-0043 or help@ora.wa;gov. • For a list of addresses to send your JARPA to, click on agenc)l addresses for completed JARPA. JARPA Revision 2012.1 Page 17 of 20 1 Oa. Compliance with the State Environmental Policy Act (SEPA). (Check all that apply.) l!!ll.!Jll • For more information about SEPA, go to www.e91.wa.gov/programs/sea/sepa/e-review.html. . . . DA copy of the SEPA determination or letter of exemption is included with this application. 0 A.SEPA determination is pending with _City of Renton (lead agency). The expected decision date is TBD . D I am applying for a Fish Habitat Enhancement Exemption. (Check the box below in 10b.) l!!ll.!Jl] . . D This project is exempt (choose type of exemption below). D Categorical Exemption. Under what section of the SEPA administrative code (WAC) is it exempt? . D Other: . D SEPA is pre-empted by federal law. . 10b. Indicate the permits you are applying for. (Check all that apply.) l!!ll.!Jll LOCAL GOVERNMENT Local Government Shoreline permits: D Substantial Development D Conditional Use D Variance ~ Shoreline Exemption Type (explain): This is a maintenance 12roject. Other city/county permits: D Floodplain Development Permit D Critical Areas Ordinance . STATE GOVERNMENT Washington Department of Fish and Wildlife: ~ Hydraulic Project Approval (HPA) D Fish Habitat Enhancement Exemption Attach Exemption Form Effective July 10, 2012, you must submit a check for $150 to Washington Department of Fish and Wildlife, unless your project qualifies for an exemption or alternative payment method below. Do not send cash. . . . Check the a1212ro12riate boxes: D $150 check enclosed. (Check# ) Attach check made payable to Washington Department of Fish and Wildlife. ~ Charge to billing account under agreement with WDFW. (Agreement# 13-1069) D My project is exempt from the application fee. (Check appropriate exemption) D HPA processing is conducted by applicant-funded WDFW staff. (Agreement # · \ D Mineral prospecting and mining. D Project occurs on farm and agricultural land. (Attach a copy of current land use classification recorded with the county auditor, or other proof of current land use.) D Project is a modification of an existing HPA originally applied for, prior to July 10, 2012. . (HPA# l . . JARPA Revision 2012.1 Page 18 of 20 Washington Department of Natural Resources: 0 Aquatic Use Authorization Complete JARPA Attachment E and submit a check for $25 payable to the Washington Department of Natural Resources. Do not send cash. Washington Department of Ecology: . 0 Section 401 Water Quality Certification FEDERAL GOVERNMENT . United States Department of the Army permits (U.S. Army Corps of Engineers): 0 Section 404 {discharges into waters of the U.S.) D Section 10 (work in navigable waters) Note: The project is anticipated to aualifv for a Nationwide Permit 3 for Maintenance . .. United States Coast Guard permits: D Private Aids to Navigation (for non-bridge projects) JARPA Revision 2012.1 Page 19 of 20 Part 11-Authorizing Signatures Signatures are required before submitting the JARPA package, The JARPA package includes the JARPA form, project plans, photos, etc. ~ 11 a. Applicant Signature (required) ~ I certify that to the best of my knowledge and belief, the information provided in this application is true, complete, and accurate. I also certify that I have the authority to carry out the proposed activities, and I agree to start work only after I have received all necessary permits. I he~eb~ authlfZ&&e agent named in Part 3 of this application to act on my behalf in matters related to this application. (initial) · By initialing here, I state that I have the authority to grant access to the property. I also give my consent to the permitting agencies en~n the property where the project is located to inspect the project site or any work related to the project. (initial) I Applicant Printed Name Date 11b. Authorized Agent Signature ~ I certify that to the best of my knowledge and belief, the information provided in this application is true, complete, and accurate. I also certify that I have the authority to carry out the proposed activities and I agree to start work only after all necessary permits have been issued. Joseph 0. Callaghan Authorized Agent Printed Name 11c. Property Owner Signature (if not applicant). [b§!Ql Not required if project is on existing rights-of-way or easements. February 11, 2014 Date I consent to the permitting agencies entering the property where the project is located to inspect the project site or any work. These Inspections shall occur at reasonable times and, if practical, with prior notice to the landowner. Property Owner Printed Name Property Owner Signature Date 18 U.S.C §1001 provides that: Whoever, In any manner within the jurisdiction of any department or agency of the United States knowingly falsifies, conceals, or covers up by any trick, scheme, or device a material fact or makes any false, fictitious, or fraudulent statements or representations or makes or uses any false writing or document knowing same to contain any false, fictitious, or fraudulent statement or entry, shall be fined not more than $10,000 or Imprisoned not more than 5 years or both. If you require this document In another format, contact the Governor's Office of Regulatory Assistance (ORA) at (800) 917-0043. People with hearing loss can call 711 for Washington Relay Service. People with a speech disability can call (877) 833-6341. ORA nublication number: ENV-019-09 rev. 06-12 JARPA Revision 2012.1 Page 20 of 20 WASHINGTON STATE Joint Aquatic Resources Permit Application (JARPA) [h§!Q] Attachment C: ll'.'llll'.'JI ~ US Army Corpa of Engineers 'i' Seattle Dlstrlet Contact information for adjoining property owners. [M]Q) Use this attachment only if you have more than four adjoining property owners. u se black or blue ink to enter answers in white soaces below. 1. Contact information for all adjoining prnperty owners. [M]Q] . . Name Mailing Address . Renton Housing Authority PO Box 2316. Renton, WA 98056 City of Renton 1055 S Grady Way Renton, Washington 98055 . . Unknown (No data) Unknown Ambrose KL 21 Logan Ave S Renton, WA 98057 The Boeing Company PO Box 3707 M/C 20-00 . Seattle, WA 981.24 Renton School District 300 SW?'" St Renton, WA 98055 ~------------------------------------~ AGENCY USE ONLY Date received: Agency reference #: f-_ Tow ~AL.IJ.f~l·---________________ -___ l 1 TO BE CONIPLETED BY APPLICANT [hfilQ] 1 ' ' ' Project Name: Cedar River Maintenance Dredging · · Project ' ' ·-------------------------------------· . . . . . Tax Parcel# (if known) 0007200213 . . 1723059007, 1823059263, . 1823059275, 1823059277, 7229300626,0723059007, 0723059096 2539020000 7229300380 .. . 0723059001, 0723059046 . 0723059053,0723059085 . . . If you require this document in another format, contact the Governor's Office of Regulatory Assistance (ORA) at (800) 917-0043. People with hearing loss can call 711 for Washington Relay Service. People with a speech disability can call (877) 833-6341. ORA publication number: ENV-022-09 rev. 06-12 JARPA Revision 2012.1 Page 1 of 1 WASHINGTON STATE If.Ml ~ US Army Corpe Of Engineer• r Seattle District Joint Aquatic Resources Permit Application (JARPA) lb.filru Attachment E: Aquatic Use Authorization on Department of Natural Resources (DNR)-managed aquatic lands lb.filru AGENCY USE ONLY Date received: ; OI'own D Application Fee Received; D Fee NIA D New Application; D Renewal Application Type/Prefix#: __ ; NaturE Use Code: LM Initials & BP#: RE Assets Finance BP#: New Application NnmhPr• ·--------------------------------------~ Complete this attachment and submit it with the completed JARPA form only if you are applying for an Aquatic Use Authorization with DNR. Call (360) 902-1100 or visit www.bit.ly/dnr aquatic lease for more information. • DNR recommends you discuss your proposal with a DNR land manager before applying for regulatory permits. Contact youF regional land manager for more information on potential permit and survey requirements. You can find your regional land manager by calling (360) 902-1100 or going to http://www.dnr.wa.gov/Publications/agr land manager map.pdf. lb.filru • The applicant may not begin work on DNR-managed aquatic lands until DNR grants an Aquatic Use Authorization. • Include a $25 non-refundable application processing fee, payable to the "Washington Department of Natural Resources." (Contact your Land Manager to determine if and when you are required to pay this fee.) lb.filru DNR may reject the application at any time prior to issuing the applicant an Aquatic Use Authorization. lb.filru 1. Applicant Name (Last, First, Middle) Straka, Ronald J. (PE) 2. Phone Number and Email . ( 425) 430-7248; rstraka@rentonwa.gov 3. Which of the following applies to Applicant? Check one and, if applicable, attach the written authority-bylaws, power. of attorney, etc. lb.filru D Corporation D Individual D Limited Partnership D Marital Community (Identify spouse): D General Partnership l:8l Government Agency D Limited Liability Company D other (Please Explain): Home State of Registration: JARPARevision 2012.1 Page 1 of2 . 4 .. Washington UBI (Unified Bus1 .. vss Identifier) number, if applicable: ~ .· . . N/A . 5. Are you aware of any existing or previously expired Aquatic Use Authorizations at the project location? . IZI Yes DNo D Don't know If Yes, Authorization number(s): 31-070471 6. Do you intend to sublease the property to so·meone else? · 0Yes C8J No If Yes, contact your Land Manager to discuss subleasing . . 7. If fill material was used previously on DNR-managed aquatic lands, describe below the type of fill material and the purpose for using it. [bgJJJ] . . . The previous lease authorized excavation and removal of sediment deposited naturally by the Cedar River; there has been no artificial fill at this location associated with the dredging project. Existing fill is present within the property but outside of the dredge prism. This fill includes bank revetments and bridge support structures (abutments and piers) for North Boeing Bridge, which is associated with Boeing and/or City of Renton Airport operations. I To be completed by DNR and a copy returned to the applicant. Signature for projects on DNR-managed aquatic lands: Applicant must obtain the signature of DNR Aquatics District Manager OR Assistant Division Manager if the project is located on DNR-managed aquatic lands. I, a designated representative of the Dept. of Natural Resources, .am aware that the project is being proposed on Dept. of Natural Resources-managed aquatic lands and agree that the applicant or his/her representative may pursue the necessary regulatory permits. My signature does not authorize the use of DNR-managed aquatic lands for this project. Printed Name Signature Dept. of Natural Resources Dept. of Natural Resources Date District Manager or Assistant Division Manager District Manager or Assistant Division Manager If you require this document in another format, contact the Governor's Office for Regulatory Innovation and Assistance (ORIA) at (800) 917-0043. People with hearing loss can call 711 for Washington Relay Service. People with a speech disability can call (877) 833-6341 . ORIA Publication ENV-049-12 rev. 08/2013 JARPA Revision 2012.1 Page 2 of2 LEGEND ---HAUL ROUTE ---DREDGING CENlERUINE ----PROPERTY LINE PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 47' 29' 37.00~N, 122· 12' 48.02~W ADJACENT PROPERTY OWNERS· PATIJM· NAYPBB 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON ONR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS W!LLIAMS AVE) 9. HEITMAN-BODEN, S 1 0. AMBROSE, K SITE KEY MAP 0 BOO SCAL.£ IN FEET CEDAR RIVER MAINTENANCE DREDGING SITE KEY MAP APPLICATION BY: CITY OF RENTON S7, 17, 18 T23N ASE PROPOSED· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER· lli..;_ CEDAR RIVER AL.. RENTON COUNTY: KING SHEET 2 OF 29 fil.IE.;_ WASHINGTON MIL_ 2/3/14 / I c" \.--· 1. ~OY. P"'-SCO,,-' ' . ' a},• WASHINGTON KEY MAP LOCATION MAP 0 2000 SCALE IN FEET PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT tOCATION· 47" 29' 37.00"N, 122' 12· 48.02"W ADJACENT PROPERTY OWNERS· DATIJM· NAVDBB 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN-BODEN. S 10. AMBROSE, K CEDAR RIVER MAINTENANCE DREDGING VICINITY MAP APPLICATION BY: CITY OF RENTON 87, 17, 18 T23N R5E DRAWING INDEX 1. VICINITY MAP 2. SITE KEY MAP 3. PLAN/PROFILE (STA 0+00-B+DO) 4. PLAN/PROFILE (STA 8+00-16+00) 5. PLAN/PROFILE (STA 16+00-24+00) 6. PLAN/PROFILE (STA 24+00-32+00) 7. PLAN/PROFILE (STA 32+00-40+00) B. PLAN/PROFILE (STA 40+00-48+00) 9. PLAN/PROFlLE (STA 48+00-56+00) 10. PLAN PROFILE (STA 56+00-64+00) 11. DREDGING SECTIONS 12. BANK STABILIZATION SECTIONS 13. BANK STABILIZATION SECTIONS 14. OUTFALL REPAIR DETAILS 15. TEMPORARY CON_STRUCTION ACCESS PLAN 16. TEMPORARY CONSTRUCTION ACCESS PLAN 1.7. MITIGATION/PLANTING PLAN (STA 0+00-8+00) 18. MITIGATION/PLANTING PLAN (STA 8+00-16+00) 19. MITIGATIO_N/PLANTING PLAN (STA 16+00-24+00) 20. MITIGATlON/PLANllNG PLAN (STA 24+00-32-tOO) 21. MITIGATION/PLANTING PLAN (STA 32+00-40+00) 22. MITIGATION/PLANTING PLAN (STA 40+00-4B+00) 23. MITIGATION/PLANTING PLAN (STA 4B+OD-56+DO) 24. MITIGATION/PLANTING PLAN (STA 56+00-64+00) 25. PLANTING SECTIONS 26. PLANTING SECTIONS 27. PLANT LIST 1 28. PLANT LIST 2 29. PLANTING DETAILS PROPOSED: MAINTENANCE DREDGING, REPAIR ~~WTIBNAGN~ASNT~B1~~~f115~n1:t) OUTFALL REPAIRS REFERENCE NUMBER· ill;_ CEDAR RIVER Al;_ RENTON · COUNTY· KING SHEET 1 OF 29 ~ WASHINGTON ll.tJEc 2/3/14 ,. $-"!'):-' ~g~~1Q Ezozr'l:::;! ,_o ---< i i :.::~~~~~ Ulz1"1 [!] 4>-I:S::: >c~~ZAl ~>> ~3:::::jQ,;;-:iZ r,..J~Z '-"Vl oco-1 w::o i;:l Ult;~~§! ~o ~ UlnU)iJ :-JAlz -1 ~ oon ;o -< o,~r'l 9~!ll:-J?1 ~ ~~~ >::i:...,,r:::;:>::o ~ r'l :S::[!] [!]:i,,Cr'l 0 -UCl ~.';:)f'i'"il ,;~g (/)~-:;,;;:zs:J~ > ·r,.;z !'11 ~ ~~I ~~~ :;,;;:rorr, 0 -<o o Ul ol/l z c·· I\J ~M o !,'] i ~ ?=~ $ ~ > g u,Z 0 ., > ,, ,...._ 8 ~ ~ §1 0 z a,+-- "' 0 ""'D "0 ~ '< di '11 ~ + r "om ,, 0 cl '-' z ~ i Jc; I" ---< " C, •• (Tl rr1 "' zo ---< ,. A O ,a ~~z N "' ~~ N ,S ',. u u, ,I ~z " ci z " ~ s::: )> z ril () Zm )> 0 z )> () :a m :a 0< :a m m :a 8 t5 I ozrn;::::: Crrl~)> ~=EU>z >ro§ErM F~0~ :;:uAroz ~~~~ ~>"'o ::tl~l/}:::0 Ulr-1r'l N>o >Q;IQ :::!CZ ~S;;!.0 ,. ='" zO~ O·z)> a; ~ I "j ~ 1i·0· 0 '' -/, II """" fi."I ""''"'~ •' r--:-.::: ' _, r EAST LEVEE STATIONING I I I I ) I PARK ACCESS RD "~7:·, -f-·:1-----:+--··t-1c--~0·) CITY BOAT RAMP -\-------n 7_,: _. .,..,., ··, _ ,~ . -CONSTRUCTION ACCESS ...=~ ,.., ., --· 0 ;/o ~:) \!!\\. 0 '-0 ~ + __ , ·+ •. -~ ~ :-=-=-:..--:-·-:c.-:-·-c,-{~, ~ ,;,~----:::-:: g ~<~?t + .--I'·"' I.' If ~-(.I/ I ' : l L , / ,\If ,, r~. ·---I I CEDAR RIVER TRAIL PARK .--.----- ,--r7 -4-". ~ ~"-~;~~::. >~c~c; . ,(~i~ c_ -~--~ ~~k•~~~~~#i1 '/'c ... '• w-L r--,., 1· _-::::---==1~11 " T . .. 9 -. '-( ---,,,; ··-____ . ---~----··· .,, /Ji '';-:t, / ',-:;'-,7 (1. CHANNEL------,,--<f---.,; __ :'S.----_/ . 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BRIDGE EL +24.73' APPROXIMA T£ EXISTING WOOD BULKHEAD PLAN O 50 1QO SCALE IN FEET :sz LAKE WA HIGH WATER EL +18.60' sz LAKE WA LOW WATER EL +16.75' ---------- --,, t .......... /-~~¢--~------------------------SLOPE-mi ~~:~~:~:~~~---- -------------------------------1- B O DREDGE CUT EL +11.56' TRANSITION TO EXISTING GRADE (BENEATH BRIDGE) 1' OVERDREDGE ALLOWANCE KING COUNTY METRO SEWER LINE T.O. PIPE EL +0.50' NOlE OHW ELEVATION VARIES, 25 20 "' " §! -: ~ z' 0 10 F < > w ~ w 5 I SEE PLANS F.ND SECTIONS : r~ o~~~-~-~--~-~~-~-~~-~-~~~~-~~-~-~~-~~ D -DO 6+00 7+00 0+00 1+00 2+00 3+00 4+00 5+------ LEGEND PAOALE HORIZ. 0 50 100 -------PROPERTY UNE ej CATCH BASIN MAJOR CONTOUR >-----OUTFALL VERT. 0 5 10 MINOR CONTOUR .-, 6" > TREE SCALE IN FEET --ott11---QM--OHW ~ CONSTRUCTION ACCESS --•---•--• HAUL ROUT£ _:;;j al i ~ ' "' "' -< a. ii : I \I ' :1 ' PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 47" 29' 37.00"N, 122· 12' 48.02HW ADJACENT PROPERTY OWNERS· DATUM: NAVPSB 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERA TlONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INv'ESTEMENTS WILLIAMS AVE) 9. HEITMAN-BODEN, S 10. AMBROSE, K "' N (88(!,W 0 "' N 9S'LL ·13 oo·oo+9L :vis 3~NVH:) 30V~~ I o.z <CO "'F' o.u "'I'! 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" :;·:: _:::-,i.J:;, ~-~-C~ C~A~~ :i:: ____ .-~-~-----~~--:~f:_·;;JJ[:~JJ~1~J--:~~~~--~~=:-~,C~ . 6 . - ::, .. ::---=-~-~TART OF TRANSITION TO 80' WIDTH BOTIOM STA 24+oo-_-__ -_--'---:-~_-_-__ -_--__-_--__-:_-_-_ ' .., . ...:.. v'~ C"c''~,:;;,k-..\~p~"~~!~~;,12Slllf~~~:;:~'-Y~'ffo~~~1~~~~~~;~~~~~~ ,, ·=--~=~F--1 -... _,., ; -11--::s: 25 20 ----1· ' ,If. CHANNEL .. ·c· · ·, ,_. -C 19-.-'-. · • 'ff \j~-;~+66~------.. ·27·+00_·---·IJ.:...:. __ :-~B_~-Oc( __ :--~~--2s __ .~0(i. ·:30+00· ~-· :·31+0~6"_ ·_ . _:{2~00: •---;-=---~ '. . '"> -r--:---:-~-,----' ,· '.c•'->._...__:._ ___ ,.._.,._~.:_ . ·_,..;.·;1_ . ', ~ 1 --, __l__ -, ---::-·r-==---'---·-:.------=----_----=--1--~ -..c:.,_:_ -, ~If+---- --__> _ ·· ~ · / CEDAR RIVER _ /,.;;:~--t;__ ------>---,-,~ ri-:o. CHANNEL' ·y -, ____ , \~ 0 __ ,_ 10 __ _ ;~j ~ -........__;;,, -· · ---.,---, · ._ ~--::::;;:::-z ·. :_ . S.--_".:_..:. _ _:_ · 7---------,_._ __ .:.._._ · · · I <1.: ·• + _,.4 + -ov~ ,--•8 FRONTAGE RD- i ---~ ~ ~ ~ r;~-. ..,_._'*/~ CONSTRUCTION ACCESS MAINTENANCE AREA EXISTING FLOODWALl j AND BANK MAINTENANCE D PLAN 50 APPROXIMATE EXISTING WOOD BULKHEAD 100 .. WEST LE\/EE STA TlONING a- CONSTRUCTION ACCESS j i -- ANO BANK MAINTENANCE 25 sz LAKE WA HIGH WATER EL +18.6' SCALE IN FEfiliSTING GRADE\. ___ -----------------/·--- --~-- 20 <O __/, ~ LAKE WA LOW WATER EL +16.75' ---~-,d----------~ 15 SLOPE,-0.1625"._ ___ 1 _____ ---------~ -----------:-0.-:REDG~U~ ---------1' OVERDREDGE ALLOWANCE F 10 i ':J ------------./ ro §? 15 ~ z 0 10 F "" > w 5 NOTE OHW ELEVATION VARIES, o F s,EE P~ANS 'AND SECTI~Ns , , i t , , I , , , I ' ' , I , 1 , , , I , , l j 24+00 25+00 26+00 27+00 28+00 29+00 30+00 31+00 32+00 LEGEND MAJOR CONTOUR MINOR CONTOUR --OHW---OHW--OHW ----•-•---• HAUL ROUTE [>--TIDEFLEX >--OUTFALL ~ t::::01 -~ ~ WETLANDS "NEW~ BANK STABILIZATION ~MAINTENANCE~ BANK STABIUZA TlON PRORLE HORIZ. 0 50 100 VERT. 0 ti I\J SCALE IN FEET CONSTRUCTION ACCESS ;----,. 6H > TREE ej CATCH BASIN ,_ 5 0 w ~ w !!l >i ~ Q) i Hl ;-,.,.,,.. ,. i ~ _:SO>;:;J-1(") F ~6~~=i R -0 --i -< .... §:ooorn 0 .. Ul~;:i:izg"T'J ~Ii:: > ~::;o"Tlz;:o -.....l>J>-< c>>G"Jm "N-rr1:i::::::!Q z N>z '-'Vlorn-1 r.0::ortj z::loo ·oz LJi'Vlrr,3::2 01::0:t,, UlnVI;;' :--Jrr,Z --, 2 oo 0 n ;;o -< S,cl'TI ::Z~~ ~O I'· NZC/1 )>I"T'Jr:E>XI N (Tl 3::[!J CJ>C(Tl .-u() ~~:~~~~I"~~ VlZ-(i);:uZ l> .p.() pl I z -l~I !ll-d~ ::,/Dri, 0 o O U1 gui z C ' N_ "Tl rriM a !::!l :e· r Z3:: Z Z l> 0 -(Tl :;:o '1 < 0 u,Z 0 o1 > ...... :i: en ~ j;! "1J g (,) > z I\) z m + --:f. "1J "0 .... -0 ...u ::;JI Q a\ ~ "Tl ~ + r 2 om <>0 z ...... ~1~F "' " . """ ~ zo -; > >-0 00 ~ z z ;:o " - N ;ii ~ "' ~~ N >c "> ~'" '-I ;~ -; 0 z s::: )> ~ () Zm )> 0 z )> () :Jl m :JJ o- :Jl ii, m :JJ ~ 0 ~ ozrns:: Cl"'l?:';> ::;:J-:E(/lz >ro::::!-----1 rJ>-Zl'TI r 2 o~ ::;oAroz '1:l~~g ~>"'o :::tlQ:1l/l;::o <llr-HTJ ~~~ ::!CZ ONC, Z>" ,_=loo z~~ O• >- '" I I ... -·, _, 32+00 , 33+001-/ .... ·1~-, -_ 1 e6. CHA~::~ ' -1!31--------,_....,_.,...'7 0.. =.::1 0 0 /; n CONSTRUCTION ACCESS AND BANK MAINTENANCE 25 ~ EAST. LEVEE STATIONING l·,8 EX!STING BURIED DUCT BANK EXISTING RIPRAP g + ... \" +-.._ \ 'fl... EXISTING WETLAND C <..,' 2 ' . ---~ J4+Qo.... 1--' :-..i"' j-5+oo .. _ ·315+00 "5i+o'O g. I , I .._, -/_:__:_:__ -· · · • · 0 0 + -~ ,,._ "-.---~. 1 ---~, (-CHANNEL-_ __ ,...---...... _ . --_ ~-' ...: -;r-~ ------1---------1--~[CEDAR ~ -,r, -,,;:io,--,s--- 0 0 + .,. n REPAIR AREA o so 100 'i a_ 38+00 ' ,_ 0 0 + m ... 0 0 .-, ·+ -.r.,,_:..o. , "' , . ,_j_. ·, '~~-- r;'""'~""J;'~~~~~=:-;·;; , ...... ;: ·1:, .. D-.-.---~ '~1,..,.,,~."::::-.-::-.~ .... '-~. ;;,;c-::t, .. a, ~ i7"""' \ \ ~- ::-c-:;-::t---,40 [1=39+00 }Jg -~-~S'_,: ..;:----~:2' 'EXISTING -g ---·6 ---,r:. WETLAND ~ . ~~ -~ -- ----- ; ·:::-\-~ .. ~t.'---1--- -~ CONSTRUCTION ACCESS AND BANK REPAIR EXIS1lNG CONCRETE SLABS B.O. BRIDGE EL +25.0' 25 :s:z LAKE WA HlGH WATER EL +18.6' SCALE IN FEET EXISTING GRADE\ ---~-"'-~~EWA LOW WATER EL +1675"----------------------~----\----20 ::l SLOPE=0.1625% ~ 31s >-~ z 0 F 10 :; 'j -----~-a.o ~.;.,;----1~ a<ea•= ~"'"" _____ ---~/-- EXISTING DUCT BA w 5 NOTE OHW ELEVATION VARIES, SEE PLANS AND SECTIONS ABANDONED SEWER LINE EL -9.3' 0 ----34+oo 32+00 jJ+UU 35.f.00 36+00 LEGEND ---------MAJOR CONTOUR MINOR CONTOUR --o-1----i:»l*--OHW -----•-•-• HAUL ROUTE r>--TIOEFLEX )---OUTFALL ~ WETLANDS t::::.::::,J ~ - "REPAIR" BANK STABILIZATION "MAINTENANCE. BANK STABILIZATION . "NEw" BANK P777J STABILIZATION rLL£I PROFILE HORIZ. 0 50 'vERT. 0 5 SCALE IN FEET CONSTRUCTION ACCESS 37+00 38+00 39+00 100 ~ JQ 6" > TREE §} CATCH BASIN ------,, 20 «i w §' ---j 15 ~ z 10 ~ " 'j w 5 ~ 40+00 a I cn _:-,J ,:::l 00 ;j ~ :D ffi ) i\t ' ' ' I 13().Q' \;30,0 I' ) ;:; ' I ; ' " z z o. ~ V, ~ ".J >- ~ w w .. 0 0 ~ ~ " z F V, x w :/ J oo+z.s PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 47" 29' 37.00"N, 122· 12' 48.02~W ADJACENT PROPERTY OWNERS: DATUM: NAYP88 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOE/NG COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON ONR AND OPERATIONS CTR 7. LEI. YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN-BODEN, S 10. AMBROSE, K 0 N a_ <( "' a_ "' " z F V, B "' ., a_ w "' I I I I I I I I I I I I I I I I I I I I I I I ~\ ~ I ~ I " I ~ I F I B \ g I "' I ~ t;:j I ~~...J~~\ m ~0..1 it I <C <C".J I "'-o" "' R w(/') ~ l ~> g v• ...JO LL 8 I (/')::::E 0 ..:c O I ff:· ~~ ~ z I W v, 0 o~ 1 +n5 ~ x F= 1 z w ~ I o :2 I:!: I i (.)....... UJ l ~ z I 8 I l ~ I i ~ f I I ' I I I \ I I I I \ I "' N I I I I I I I I I I I (88(]A I I I I I I I I I I I I ;; I i I ~ l I I I I I I I I I I I I "' .:I 'NOLLVA313 2 w u ! ~ < tJ 0 w "' 0 ~ 0 "' "' S7, 17, 18 T23N RSE 0 g + ~ 0 0 ;t .... g + '.l' 0 0 + ~ 0 0 $ 0 0 + n .... 8 s "' zz <CO WF • <( «to' ~ :d a_m w<C "'>-. "' "' z <( m z 'ii m A 1o () ~ w u u < (8BOAVN) 1..:1 'NOlLVA313 CEDAR RIVER MAINTENANCE DREDGING PLAN/PROFILE (STA 40t00-48tOO) APPLICATION BY: CITY OF RENTON PROPOSED· MAINTENANCE .DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER· ill.;_ CEDAR RIVER .AI;_ RENTON ~ KING SHEET B OF 29 ~. WASHINGTON !l8R;_ 2/3/14 " /.1) I oo+gg i1 ch~· ' ., ,, '' ' PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I QCA]QN: 47" 29' 37.00HN, 122· 12' 48.02"W ADJACENT PROPERTY OWNERS: DATUM: NAVD88 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR ANO OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F &: K INVESTEMENTS WILUAMS AVE) 9. HE1Tu1AN-80DEN, S 10. AMBROSE, K V "' N (880A go·sl+ I oo·oo+gg :vis -... ~1,"'N"'N"Y"Ha"""',"'a2vs'"oi-~--,/~-, \ 0 0 0 i I I I I I I C ) I / I / I i I I I I < I I /I : w I I o I ~ I I " I jg I " I ~ t ~ I X l ~ w I ~ I \ ~ I I I I I I j I j I I I \ I I I I I I I i I / I ) I I I I I I : I I I I I I : I I I I I I I I . I I I I I I I I I I I ,, >- " u ~ 8 "' 0 q <D 'NOllVA3T3 '!2 ~ "' ~I "' S7, 17, 18 T23N R5E 0 g + :!l g :l: "' 0 0 ;J; "' 0 0 ;t "' 0 0 + ,ii g + ,; g + ~ 0 I I ! I I I I I X g 0 <= (88Q,\YN) 1..:1 'NOllV/\313 l CEDAR RIVER MAINTENANCE DREDGING PLAN/PROFILE (STA 48t00-S6t00) APPLICATION BY: CITY OF RENTON PROPOSED: MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER: lli;_ CEDAR RIVER AT: RENTON ~ KING SHEET 9 OF 29 WASHINGTON 2/3/14 ' ' '' ;o ,o i+ ,n '"' \ iw :z . ;z ,;j.'··J t) "<( )S 11j~w: : ct ·"' , -;_, ,I ' •30.0 · .30.0 ' I ' I ·gt + (0, I I ' PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 47" 29' 37.00nN, 122· 12' 48.02nW ADJACENT PROPERTY OWNERS: DATUM: NAVPBB 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI. YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN-BODEN. S 10. AMBROSE. K ""· ',~\ \"-, \\ '\\ \\ >/ ', ', / (98CJ,\\ "' N / I I I I I I I I I 'NOl1 VA313 . N "' S7, 17, 18 T23N RSE SL---'--'----------1 ")·' /'\ I I I ,/ " \/ I I I ) ) I I I I I 8 (/ "' z w 8 a, I ~ ;:; w I < w 0 <( "' " " z " "' " w CEDAR RIVER MAINTENANCE DREDGING PLAN/PROFILE (STA 56t00-64t00) APPLICATION BY: CITY OF RENTON I I I i I I I I I I I I I I I I I \ I I I ) I I I I I I I I I \ I I I I I I / L I I \ I I I I I I I I I I I I I I I I w I >-" " z " "l 0 II w Q, ~ I I I 0 N I " 'i tJ 0 I 0 :J w <( I "' w 0 " 0 I d w ro er 0 I "' w > I 0 ~ I I I I I I I I I I (BBOAVN) 1.:1 'NOllVA313 0 0 + n <O 0 0 + N <O 8 + <O 0 0 + 0 "' 0 0 + :)) 0 0 + "' "' 0 s w ~ al a: a. 0 N a' 0 I PROPOSED: MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABIUZA TlON AND OUTFALL REPAIRS REFERENCE NUMBER: .LN.:.. CEDAR RIVER .AL_ RENTON s >-w I:' "';a; ':J <( " "' 0 >-' er ~ wz uO zec <( <( ZN ~d z<D -<( <( >- "'"' l I I I l ' mu..tIT'1.';.. Kl NG SHEET 1 0 OF 29 .s..rAifi_ WASHINGTON = 2/3/14 87, 17, 18 T23N ASE 'a)' 35, ~ 30 ~ 25 6 t-20 . '"<.< ·: ~ z 15 ~ 10 " 5 ci 0 0+00 -40 "' ~ 35 ~ 30 6 ~ 25 ~ z 20 ~ 15 § 10 ci 5 0+00 fil' 35 ~ 30 6 25 t;: 20 z 1S 0 ,= " 10 w 5 ~ w 0+00 -40 "' ~ 35 < 30 6 ~ 2S ~ g 20 i= 15 ~ 10 s o+oo EXISTING CONCRETE -FLOODWALL /BANK STABILIZATION (REPAIR) ~ CHAN:XE·L DREDGING EXISTING SOTIOM .... ·.·.···• •. ~ ~""-. (__ ~ OHW EL +19.3' \ _/_ OHW EL +19.7' ~ (",:~/: ';:;.:.. ___ ~--i-----r------~-----------<s_,'_1r'-~- ... v r---r--~:--,------1---45' ~ ,W 1' OVERDREDGE ALLOWANCE _J 0+25 0+50 0+75 1+00 DISTANCE, FT TYPICAL SECllON DREDGING 90 FT WIDE (STA 20+00) 1+25 1+50 1+75 EXISTING CONCRETE FLOODWALL 0+25 0+25 0+25 BANK STAB\LIZATION (MAINTENANCE) BANK STABILIZATION (NEW) L EXISTING BOTIOM '7 OHW~ :: ~EDGING;\_~ CHANNEL --OHW E~ +19 B' '.)Z 3H:1v ---------'-------------~Y..-' '-----40' -+---'-----40' ,-----I o+so o+75 1+00 1' OVEROREDGE ALLOWANCE DISTANCE, FT TYPICAL SECTION DREDGING 80 FT W'IDE (STA 32+00) EXISTING CONCRETE FLOODWALL CONCRETE: SLABS, TO BE REMOVED 1+25 1+50 BANK STABILIZATION (REPAIR) c ilDREDGING 't:. CHANNEL EXISTING BOTIOM -----1--il _0~~+229' ------I--------·~---:!iw-'" f-----35' l----i----35' ----I 0+50 0+75 1' OVERDREDGE ALLOWANCE EXISTING CONCRETE FLOODWALL 1+00 DISTANCE, FT TYPICAL SECTION DREDGING 70 FT W'IDE (STA 45+00) 1~25 1+50 / BANK STABILIZATION iEXISTING BOTIOM (MAINTENANCE) i CHAN /DREDGING .- OHW EL +25 B' \ :~L-= 27 · 5 ' 3 / / ______ _)__ " 3H:1v ----------'------:1:i'0·' 0+50 f----30' ---l----30' f----1 0+75 1+00 DISTANCE, FT TYPICAL SECTION DREDGING 60 FT W'IDE (STA 55+00) 1+25 1+50 1' OVERDREDGE ALLOWANCE 1+75 1+75 1+75 0 15 SCALE IN FEET 35 -"' 30 ~ 25 < 6 20 ~ ~ 15 z 10 0 ,= 5 " w ~ 0 w 2+00 40 -"' 35 ~ 301 25 >- ~ 20 z 15 ~ 10 ~ s 2+00 35 i 30 ~ ~ 25 ~ 20 t;: 15 g 10 ~ 5 2+00 ~ w 40 -"' 35 ~ 30 < 6 25 ~ ~ 20 ~ 15 F 10 ;!: ci 5 2+00 30 PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 47" 29' .37.00""N. 122· 12' 4B.D2""W ADJACENT PROPERTY OWNERS· DATIJM· NAYP88 CEDAR RIVER MAINTENANCE DREDGING PROPOSED· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN-BODEN, S 10. AMBROSE, K DREDGING SECTIONS APPLICATION BY: CITY OF RENTON REFfRENCE NUMBER· l.t:t.. CEDAR RIVER AL.. RENTON ~ KING SHEET 11 OF 29 filIE.;_ WASHINGTON =,_ 2/3/14 .. "'",..,. I ~ .;:; 8 ~~:ro }> E5o~rt1~ ~ ooocu 0 . · Vl~~Z~,J -f,.I,:: :J:,, ~:::o;:z:::o --..!>> < ~~Q0~ K)~z B(/)0 cn-i io:::ortj Z:;:jOO ·oz U)Vlrri3::z L-1:::oJ:- u,nU'J~ --.J(Tl~ ;rj ~ ~ggr,, ~woo--.1oi Ul z .:Z~g~ O· • • • · :::0 0 · Nzl/1 i::~"M~~~ "'?-u~ gi~R>·-~:i!~ N21g o,.~,t,001 ·e; z (l]Z-0 ;;oz)>_p.("J !Tl1Z --1=i:x: !)1--i~ wi'i, o-<0 o <J1 Ao<.n z c·· N ~rrl O !:[! ~· ~ .:2~ i ~ ~ 8 ~z o vi CD )> z s:: ;,,; )> ,. ~ z " -I " C m o 0 ,. CD Zm =l 0 ~ )> 0 z z )> "' " ?; () :a " m :a :l 0 ~~ 0 z .,, "' m m :a m 0 z b ~ C) z z 0 C) z en ~1~F I -< "'0 •• (Tl rt1 -zo " -< ,. 0 ZS:~ ::0 OZf'TI~ .,, z "' Cl"'l~)>, " - " iii :;f:E:Ulz <O "' >ro2M' F~c;Ji; :::oAmz ~~~~ ~-~ ~>;,;;o o:e~~ N>O >"'" ::!CZ " "' ~~0 " ,. u~ > =lcu ""' -z z~~ ... " o-,. b ,; z ::l §! 30 25 I 20 t i§ ~ 15 w 10 5 35 30 w "' §! 3 25 >-~ z ~ 20 <: > w ~ w 15 10 NOTE 14' 15' VEGETATION FREE ZONE (VFZ) T.O. CONCRETE FLOODWALL EL. VARIES (EL. 30.6' SHOWN) I TOP DRESS 'NITH TOPSOIL AND HYSROSEED IN VFZ I 3· 3'--t--i INTERSTITIAL SPACE FILL I '9 OHW _EL 19.8' NAVD88 /. DREDGE AREA -----------1· ~ l:J "' . . •W·'~ ~~ ~ ---ARMOR STONE 8.0. DREDGE CUT EL VARIES (El+H,1' SH9WI\I) --~ ... ...,-. • /,.;_' ..,.,.\' . ----------______ _J ~--.... ~---------~---------\..NEW BEDDING STONE J GEOTEXTILE FABRIC 160 15' VEGE7ATION FREE ZONE (VFZ) 1' OVERDREOGE ALLOWANCE EXCAVATE AND BACKFILL W/DREDGED MATERIAL 170 180 190 DISTANCE, FT TYPICAL SECTION NEW RIGHT BANK STABILIZATION STA 30+60 TO 33+00 o s 10 PLANTING BENCH (VARIES), SCALE IN FEET SEE NOTE 1 TOP DRESS WITH TOPSOIL AND HYSROSEED IN VFZ INTERSTITIAL SPACE FILL BEDDING STONE 200 210 220 8.0. DREDGE _CUT EL VARl~S. (El.+15.6'_ SHOWN) L._ ___________ _ ARMOR STONE (VOlDS FILLED WITH GRAVEL ANO COBBLE) 70 80 AND BACKFILL W/GRAVEL 90 100 110 DISTANCE. FT TYPICAL SECTION LEFT BANK REPAIR STABlLIZATION ST A 19+ 50 TO 23+90 STA 37+10 TO 4-5+46 0 5 10 SCALE IN FEET 1' OVERDREDGE ALLOWANCE] 120 130 1. GRAVEL PLANTING BENCH ONLY PROPOSED AT LOCATIONS SHOWN ON PLANS, NOT THROUGHOUT. 30 25 "' "' §! 'r"! lo >-W. ~ 'i' . ~ 1§ ...J 15 i:: w <: "' > ~ 'j 230 w 10 5 35 30 "' "' §! 25 -< ~ >- ~ 1's 20 F :; :;! 15 10 140 _!!3 _::::i <» i m ,. "'t''""e,; ~ ~ "' ~8~Rl~Q > > ~ c50~:r1~ g:i >ooorno -l ·· ·· ~~~z~..,, .J>.I3: Z:;o"TJZ:;o "-1>:i,. >C>l>i:;:if'Tl 'N- rii:s::::jQ z"Urv>~ '-'\/I ~~8d :::o <.0.€5 ~ UjVJf'T13::Z ul:;o > Ul (.!)"'lJ :-Jf'Tl z n > ooO ii z ~ocf'Tl -< z~O 0 ~:D?l:-J?l 511~-__.5-ri .• rvZ\/1 )>.I"TJ•:El>::O tv-0:;l 3:C]~~:i,.Cf'Tl ":;o--1 ~~x~~~~I ~~~ Ulz-G1~z ..f,,.()l'v !"11 z ....,....,:r !):)-lo cori, o-<0 o 01 :;:s:;:gVJ Z C · ~ ..,, ~rtj ~ ~ :E 5 • ~ :;o G') < 0 v,Z 0 ul ~ z 7' ,. ~ " " r " ,. CD =l 0 r z w N ,< ~ " :l 0 0 z ~ "' CJ) ~ z m cl ~ z 0 z CJ) ~;~f,,'"' "' " . ~~ ~ zo "' ~,. 0 ~ 2 ::0 ~ z "' NG') ~ "' "' ~~ ~ " ',. "' V> ,er ;z ~ z s::: )> ~ m () Zm )> 0 z )> () :rJ m :rJ o-:rJ < mm 8 :rJ z C) I OZf'Tl:!:: crri;:,,,;;l> :;:1::e:{/Jz :J>.rn:i;;:J F~0~ :;oAwz ITlUl}:>(") "'U--1Zf'Tl ~>:;:s:;:o :;o~c.n:::o Ulr-HTJ ~~~ :::!CZ ONO Z>-" =J,a >-o~ Zz-a 0-,. ,. 35 30 '° "' ~ f 25 >-~ z 0 ~ 20 I 15 1D 30 25 '° ro ~ -< 20 b t z ~ 15 -< > ".J w 10 5 T.O. CONCRETE FLOODWALL EL. VARIES (EL. 34.8' SHOWN) FILL INTERSTITIAL SPACE W/GRAVEL/SOIL MAINTENANCE WORK. INSTALL NEW ROCK TO RESTORE SLOPE ~ !t_ CHANNEL I ' I ' I OHW EL 24.9' NAVD88 EXISTING ROCK TOE --_ -___ -1-________ _ • f DREDGE AREA ---------; ~ w le V> 100 110 --DREOGE ARE~~ --- 8.0. DREDGE CUT Et-. -I --~ VARIES (EL +]2.5' SHOWN) ____.-'3'f4.·.'. ~l\l B.O. DREDGE CUT EL VARJES _(~L+17.1' SHOWN) L---------------- 120 130 DISTANCE, FT TYPICAL SECTION LEFT BANK MAINlENANCE STABILIZATION STA 23+90 TO 37+10 STA 45+46 TO 55+B5 o s 10 SCALE IN FEET GEOGRID AND COIR. FABRIC WRAPPED COMPACTED SOIL 0 ~· ,..:t /'i',,~~'/. i I EXCAVATE AND BACKFILL W/NA11VE COBBLE GRAVEL ' ----------r----------J- 1· OVERDREDGE ALLOWANCE 140 150 160 1.0' THICK ·-· -,~c 0 --- ---~<.;r ~·'.> ··,~,,)Y ROCK TOE -------------l 1' OVERDREDGE ALLOWANCE 6" THICK STREAMBED GRA \/EL BASE 10 20 30 40 DISTANCE, FT TYPICAL SECTION GABION REMOVAL MITIGATION STA 21+70 TO 22+86 0 5 10 SCALE IN FEET 50 60 70 35 30 ro "' ~ 25 3 t 5 20 ~ ".J w 15 10 170 30 25 '° "' ~ 20 >- ~ z 0 15 r= -< > ci 10 5 80 ~ CJ) 1; ~ 00 -I ~ z a: m EXISTING CIP CO NCR WALL (TO REMAIN) S7, 17, 18 T23N ASE REPAIR EXISTING TIDEFLEX VALVE ll OHW EL +24.8' 8.0. DREDGE CUT EL VARIE 1.0' OVEROREDGE DETAIL ARMORFLEX WITH OUTFALL D 2 4 SCALE IN FEET REPLACEMENT TIDEFLEX VALVE LEXISTING BANK EXISTING RIPRAP --.~( ~-/' 2 [ ./)=_,l . OHW EL VARIES .. _J:£/ j\_j/ ~~J~ 1 1 1 //1111111111111111111 1 1;;fl/l/l////////f/llt1 "' // I/ / / / / / / / / / / / // / / / /·/ / / ----.. ----.. fl/ l/1//////////III///J/ 111 lll//////////////l/;J --....._/EXISTING RIVERBED ..... PIPE DIAMETER, SEE TABLE (THIS· SHEET} EXCAVATION, SEE NOTE 1 TYPICAL DETAIL OUTFALL WITH TlDEFLEX D 2 4 SCALE. IN FEET OlJTFALL PIPE LOCATION TABLE LEGEND PVC -POL Y\/INYL CHLORIDE C -CONCRETE DI -DUCTILE IRON CM -CORRUGATED METAL NO"TES . BANK LEFT LEFT LEFT LEFT LEFT LEFT LEFT LEFT LEFT LEFT LEFT LEFT RIGHT RIGHT RIGHT RIGHT RIGHT RIGHT 1. EXCAVATE LOCALIZED AREA TO -TEMPORARILY ACCESS TlDEFLEX VALVE AND ARMOR FLEX FOR REPAIR WORK AND BACKFILL W/GRAVEL TO PREDISTURBANCE CONDITIONS. RIGHT RIGHT PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I OCA]ON· 47· 29' 37.00~N. 122" 12· 48.02"W AO,JACENT PROPERTY OWNERS: OATIJM· NAVOBB 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INI/ESTEMENTS WILLIAMS AVE) fa. ~51:i~E,B~DEN, S CEDAR RIVER MAINTENANCE DREDGING OUTFALL REPAIR DETAILS APPLICATION BY: _CITY OF RENTON LEI/EE STATIONING 5+50 12+85 14+85 18+50 22+90 23+70 25+00 31+00 31+05 36+75 48+00 55+00 28+85 41+55 48+60 53+00 59+70 64+00 68+00 69+00 PROPOSED: PIPE MATERIAL DIAMETER (IN) PVC 12 C 18 C 18 C 12 C 4 PVC 12 PVC 12 PVC 12 C 12 C 18 PVC 12 DI 24 PVC 8 DI 24 CM 12 PVC B C 24 PVC 12 CMP 12 UNKNOWN 1B MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER· lli;_ CEDAR RIVER AL.. RENTON .rn.ttill'.;_ KING .s..IAIE;_ WASHINGTON SHEET 14 OF 29 DATIEc 2/3/14 ~ I II: "' "' ·~ le "' a: :, ~ ~ ~ '!i "' "' " w 0 w 0 " 0 w "' 0 l Cl "' " w z I-u; :J ~ " ~ ; ffi 3: ~ C: ·~~ " u "' Q. "' g§ ci a, fl; le ie e PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCA]ON: 4T 29' 37.00"N, 122· 12' 48.02DW AP,JACENT PROPERTY OWNERS· PATIJM· NAVDS8 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HE1Th1AN-B0DEN, S 10. AMBROSE, K (88CJAVN) .L.J ' V/\313 S7, 17, 18 T23N RSE " z ~ " w "' n 0 n ~ "' "' le "' :, ~ w > "' "' " 0 w " 0 w "' 0 " z u; " ~ ~ C: " u "' a, >-"' "' "' D Q. :, le 0 n "' N B z :J a: w ~ 9= w Q. Ioc CJD " Q. a, I >-w "'~ "' -ocl'c Ow a.w :,I iee "' N 0 N "''le 3::<( ~ w13: a:i ~II - -..11S:2 I i:,i, I I I I V, w "' "' w > " "' ~ "' w a, 3' "' I 0 D ~ u "' lo z, 81 I I I I I I I I I I I "' 2 I I I I I I I "' w I "' "' w I " 0 w I "' 0 I I I I I "' 0 2 0 m 0 00 0 ~ 0 "' t;: w au "'z "' 0 .. 0 n 0 N t;; i5 N 0 (88(]flVN) !.:I 'NOllliA313 CEDAR RIVER MAINTENANCE DREDGING TEMPORARY CONSTRUCTION ACCESS PLAN APPLICA TlON BY: CITf OF RENTON PROPOSfP· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REffRENCE NUMBER· Ht.. CEDAR RIVER AL RENTON COUNTY: KING SHEET 15 OF 29 .filAIE;_ WASHINGTON ll8lE;_ 2/3/14 (88CJA' I 'NOil V/\313 87, 17, 18 T23N R5E 0 ~ 0 ~ 0 :" ~ .. " " N N ~ m I I 0 ~ \ ro ro I ~ I • z I "' 0 + "' N I I ' ~ I w I I I I I I I ~ 0 w I u " z I ; 0 I/ ~ w u 0 w "' 0 ~ 0 0 :e ;. cl z • z l!I u 0 z"' N -B -:" "' s~ 0 >-ci >-u" w ,ri "-w"" I:' w " en~ "' ,; z ...J ilj "" ~ >-<(-' "' "" ~o Q~ " "' "' ~i'i ~ 0 ; ~ 0 ro • 0 ~ ~ _J 0 w >-z z °'i c,0.C oz:c ',j 0 '"""" N w~ac • • "o~ u :, ;i ~ c2 " ~i ~ F ac w Zo'" ~o affi le>->iii Oz:,S d<r:! ~j u..o~ ~~ :,w '2 ~ < Fu. ~-' iii~ ffi~ VJ~...J ~--~ ~f=~ g!:!. ~z ,s ~ ~~ ~~~ zZ ·" . " ~~ Wo<: I:: -~ [u~ W<,c, "' ~~ "'zw u ia::0 i5 0 "-=>8 u 0 oo« ci ~ "o" ~ "'ww >-N-' a_ :J 0 en WFZ """" 5 z :c oww "a,"' 0 ~ 0 ~ 0 :" 0 z .. " " N N (9801\VN) 1.:1 'NOl!V/1313 EUBEQSE· MAINTENANCE OF SECTION 205 FLOOD CEDAR RIVER EBQEQSE[:t MAINTENANCE DREDGING, REPAIR HAZARD REDUCTION PROJECT EXISTING BANK STABILIZATION, l OCATION· 47· 29' 37.00"N, 122· 12' 48.02"W MAINTENANCE DREDGING NEW BANK STABIUZA TION AND AQJACEN! EBQEEBn'. Q~NEBS· QAIUM: NA1'.J26:f! OUTFALL REP AIRS ,. CITY OF RENTON 5. RENTON HOUSING BEEEBE:t:~CE N!.!ME!EB: 2. THE BOEING COMPANY AUTHORITY TEMPORARY CONSTRUCTION ill;_ CEDAR RIVER 3. RENTON FACIUTIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK AI;_ RENTON ,. CONDOMINIUMS (55 8. F & K INl/£STEMENTS ACCESS PLAN COUNTY, KING STAJE: WASHINGTON WILLIAMS AVE) 9. HEITMAN-BODEN. S SHEET 16 OF 29 = 2/3/14 10. AMBROSE, K APPLICATION BY: CITY OF RENTON j: ' '' ' ' ' I I ' H ~+ ' "" 0 0 + ~ 45.o· PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I QCA]ON· 47" 29" 37.00"N, 122' 12' 48.02"W ADJACENT PROPERTY OWNERS· DATUM: NAYP88 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LElo YK I t 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN -BODEN, S 10. AMBROSE, K ' ' ' ' I /\1' I ·'"-I 1 , , ,, I I I I I ,, I i' 'I I I I I I ' I ' 45.o', I 00+9 ', oo+o; 0 0 >-w ~I I:' 0 " "' ".J < L> "' I 0 I I CEDAR RIVER MAINTENANCE DREDGING MITIGATION/ PLANTING PLAN (ST A o+oo-a+oo) APPLICATION BY: CITY OF RENTON 87, 17, 18 T23N R5E ;; ilj !JF ; ~~ "' i!ill!~ 3 ·o mmo ~ ::,::,z 11!11 ::I m~ . PROPOSED: MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK-STABILIZATION ANO OUTFALL REP AIRS REFERENCE NUMBER: ill;_ CEDAR RIVER AT: RENTON ~ KING SHEET 17 OF 29 ~ WASHINGTON QAIE:_ 2/3/14 : I ' \I :1 ' I ' ) I ' :1 :1 ' '1 ,, ' I I , I '· '· I: ,,. ' ' 'i 'i' 8 +-.-~-Y, "' ' . --: I 0 +:1 ~ 0' . +, I :! { / ' l / }, ' I ;·· !f/ r r ' ' I I 45:o• I o+ ol +' N/ -, / I ' I ' I I I ' 0 0 + ,:: I I I !:? I 8 -~ i ·, j; I \' ' I I I I I I ' 1, .... r-',\ ' ' ,' I ~+ I I I I I I ! 1\ \ ' < ~ i I "i 1 I 1, I I, ' ' ' I ' I I I ' I ._ OO+'i'l • I' , ,_ I ' "-, II OOHl _, ' ' I ' I ' I I I ', : ' IQO+Ol ' I I I I ,i;ls 3ii!' LO N 8 0 PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I OCATION· 4-7" 29' 37.00"N, 122' 12' 48.02"W AD,JACfNT PROPERTY OWNERS· DATUM· NAVD88 CEDAR RIVER MAINTENANCE DREDGING 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTl-iORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS C1R 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN -BODEN, S 10. AMBROSE, K MmGA TION/ PLANTING PLAN (STA 8t00-16tOO) APPLICATION BY: CITY OF RENTON S7, 17, 18 T23N R5E PROPOSED: MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMAER· lli;_ CEDAR RIVER AI;_ RENTON ~ KING SHEET 18 OF 29 .s.IAJL... WASHINGTON MIL 2/3/14 I ' (;: : \ i, ~:-: 0 \ 1 :~ 1: : : _: ;,-;j I' I . ,_.oo+gz -iii g_.j!' ' ' ' -+ VARIES VARIES , I I j '~'_, ' 0 +-, 'O . ;3;-\ N ' .1 I ' ' ' :,I 45.Q' I 45.0' i'• -~ t "'· -, 'I r~. I ~ f' i;.,,· 'o 0 +----~---'-', ~ ' ' ' 0 oo+oz ~ >-w ~I w ~ 0 ,; "' '!J <( " "' 0 00+6! · oa+s~ oo+n 00+9~ PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION: 4T 29' 37.00"N, 122" 12' 48.02nW ADJACENT PROPERTY OWNERS· DADlfk NAYPBB CEDAR RIVER MAINTENANCE DREDGING 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE} 9. HEITMAN -BODEN, S 10. AMBROSE, K MmGA TION/ PLANTING PLAN (STA 16t00-24t00) APPLICATION BY: CITY OF RENTON 87, 17, 18 T23N ASE j!;~ !l,F ~~ m l!!;f;l "' 0 mmo ~ iiz ~ ,. iliili!::! I~ 0: 0: z "' ~~ !:! ~ z ,nO ;ii m wF g ~ ~~ ""' zO "'~ 1 oz ~ [ID F <C ,. ::I ~~~ I ' ' ! i w,c I 3'w ' Iw O<n ~.,l PROPOSED· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER: lN.;_ CEDAR RIVER Af.;_ RENTON .QQ1!.1ili;_ KI NG SHEET 19 OF 29 TIA.IE.;_ WASHINGTON QAIE;_ 2/3/14 wa, if °'o go "'"" ww 0:"' cc~ :, . is~ .' I "i!c i I '-' ' ~:f I , : I i ' g+: ,, ' .m +' ' ':I m, ' NI / I Ii ' ' ' ' ' 40.0' I 40.Q' ' ,r I f ' ' 0 & 0 c ' ' + ' ,, "' , ' N J', I ' , ' /' :l ;'? a: ' :1,·', ~ o+ a: i~ I a: ~, <( NI 0 : I w ' )I 0 \: ':1 ' ( ' ' ' '~ I ' ,, ,!' t ' I ' ' ' ' \'. (,:c-: ,, , ( )~I I _, 1j:J, 0 /11•' 0 !1·!1 +, (,.,1 "' I )" N, I . ,, ' I \ -, ; ~, ' \ I,-. I '" ·. 'T I/' 1r:-i, ~ ~;. ' // ''''f" VARIES:· VARIES 1 / I '1 \1 · I , I/ I I/ I/ I I , / " '•\ , , ' 0 :ik , / / ;-1:7~, o, ', + I ' .. 1,;,:~5 C\J .. , ' / 'i ,I•' m, N, I i \ ' ,- PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I OCAJJON· 47" 29' 37.00~N, 122" 12' 4B.02"W AP,JACENI PROPERTY OWNERS· PAn.JM: NAYP88 1. CITY OF RENTON 5. RENTON HOUSING ,i!c lj!ci;J /1~0 3' ijj -11w~ w I 1fiir. Cl:'.;I: ·iii ga, 10° ~/ U)im ~~ ) ~~ -~~ 0 " ~ w ~I~ w "- ,; ".l < u "' 0 oo+LZ \r:: 1:! ~~ ~ ww 0:" z~ .,,o 00+9-Z: -,:F w< • ,' !1iN<n 1'11 :, "' is!§ : ' ., \ .,,o I ~ §"'1! (/)~~ ;o"'~ ow ~ffiz ~i~ 11: ,,, ;i ;oo+tZ \~ 1.''l1 1,l ,111 ,, ,1 }. j'C:: CEDAR RIVER MAINTENANCE DREDGING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 B. F & K INYESTEMENTS WILLIAMS AYE) 9. HEITMAN -BODEN, S 10. AMBROSE, K MmGA TION/ PLANTING PLAN (STA 24t00-32tOO) AP PUCA TION BY: CITY OF RENTON S7, 17, 18 T23N RSE PROPOSED· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER· ill.;_ CEDAR RIVER Al;_ RENTON ~ KING SHEET 20 OF 29 ill.JI;_ WASHJNGTON MIE;. 2/3/14 f oo+cigl .(~_ > 00+6t oo+LJ \ ' QO+<;t - --' ' I f.)': ' ' iJ I' ' ' 1\ '(. ;g+ ;J; n PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION: 4T 29' 37.00"N, 122" 12' 48.02"W ADJACENT PROPERTY OWNERS· DATIJM: NAYPBB 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR ANO OPERATIONS CTR 7. LEI; YK 4. CONDOMINIUMS (55 8. F & K /NVESTEMENTS W'!LLIAMS AVE} 9. HEITMAN -BODEN, S 10. AMBROSE, K ' ' ;ec le~ w ;o i'so ,_ a! l'.l w 0::, 0 0 00+9£' ,_ w ~I I±' i~ 0 ,; ~ 'cl W;o, < i'so u ,_ a! V, l'.lw 0 oo-+~~ :oo+z:r CEDAR RIVER MAINTENANCE DREDGING MlllGA TION/ PLANTING PLAN (STA 32t00-40tOO) APPLICATION BY: CITY OF RENTON 87, 17, 18 T23N R5E PROPOSED· MAINTENANCE DREDGING, REPAIR EXIS11NG BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER· ltl;.. CEDAR RIVER .AI;_ RENTON .c.Q.UJiit;_ KING SHEET 21 OF 29 WASHINGTON 2/3/14 I ' oo+zi; ' ' ' ii t ',I '' ' ·, I 0 'f'· O• + ~ " :, ' ' ' ' ·<y. ' ,, ,, '' ~I ' '" ;es l\\i 00+9t ~IIJ1 ;. Iii ~~ w,. "'o ·f, l,!c "'.: ' ww ; "':::, 1,,1: In 0 ~ .... w ~I I!' 0 " ~ ~ < u "' 0 ~m W3 !50 .... 5l i:3w "':::, • ·C\j. I ' .~· PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 4-T 29' .37.00~N. 122' 12' 48.02~W ADJACENT PROPERTY OWNERS· DATUM· NAVP88 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FAC!UTIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K 1NVEST£MENTS WILLIAMS AVE) 9. HEITMAN -BODEN, S 1 O. AMBROSE, K ' ' ' ' '/ CEDAR RIVER MAINTENANCE DREDGING MmGA TION/ PLANTING PLAN (STA 40t00-48tOO) APPUCA TlON BY: CITY OF RENTON S7, 17, 18 T23N RSE ~ z !'! PROPOSED: MAINTENANCE DREDGING. REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER: Ht_ CEDAR RIVER Al.. RENTON £Ql.illJ)'.;_ KING SHEET 22 OF 29 filAI.E;_ WASHINGTON M1l;_ 2/3/14 PIJRPOSF· MAINTENANCE 'OF SECTION ·205 FLOOD HAZARD REDUCTION PROJECT LOCATION· 47' 29' 37.00"N, 122· 12' 48.02nW AP,JACENT PROPERTY OWNERS: PADHr1" NAVDBB 1. CJTY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY J. RENTON FACIUTIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONOOMJNIUMS (55 B. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITMAN -BODEN, S 10. AMBROSE. K 0 0 >-w QO+l9 ~I ~ 0 :;; V, ".J < " V, 0 oo+1s CEDAR RIVER MAINTENANCE DREDGING MlllGA llON/ PLANTING PLAN (STA 48t00-S6t00) APPUCA TION BY: CITY OF RENTON S7, 17, 18 T23N ASE PROPOSED· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER: ill.;_ CEDAR RIVER A.I;_ RENTON .Q.Q!./1ilJ'.'. KING SHEET 23 OF 29 .sIA.IE;_ WASHINGTON Mil:.;_ 2/3/14 ' ' ' ' ' ( r: ' ' ' :~~ ,, ,, ' "-it' }I I 'r ,, ;!1 i I I ' ' ' " ' ' /! . ·J. ,. ~t) i ' ' i ' I ~ ' ' i ::::,., I /.'I ,, " I" '' 0 +\ 0 :j: ~ 1 r '' V, '' I .'c>' ··1· Z6+(9 0 + 0 + " ~ I f" 00+(9 I 0 t 0 + N ~ ~a.a' 1 30.0' oo+?.:9 PURPOSE· MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I OCATION· 4-7" 29' 37.00"N, 122" 12' 48.02"W ADJACENT PROPERTY OWNERS· PAilHA: NAVQB8 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON F AGILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 B. F & K JNYESTEMENTS WILLIAMS AVE)· 9. HEITMAN -BODEN, S 1 0. AMBROSE, K --' <( F z le! 0 Q. 0 Fis S' l'F I;; i~ ~I~ I;' :5f ;;; ~ <( u V, 0 / CEDAR RIVER MAINTENANCE DREDGING MmGA TION/ PLANTING PLAN (STA 56t00-64tOO) APPLICATION BY: CITY OF RENTON 87, 17, 18 T23N R5E PROPOSED· MAINTENANCE DREDGING, REPAIR EXISTING BANK STABIUZA TION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER· 1.N;_ CEDAR RIVER AI;.. RENTON ~ KING SHEET 24 OF 29 ill.If;_ WASHINGTON ll6IE;, 2/3/14 .. <"t"c" >-; ~ !!;;g~~1Q Ea o=ifTl~ ~ooom 0 . - Ul~~z~....., -"'IS:: )>Z;;o"TJZ::::O ---ll>> ~~~~G)~ ~~z '-'VJ orn--i (0 ;;o M z~oo ·oz UJUllTl:S::Z LJ:;o > fJloVl! 68~ ii z ocm -< zoo p~!:ll;--1?1 ~ ~g.,, :l>I"TJl:E:t>-::O ~z~ S::[!] !::l>CfTl ,"'U() ~~:~~~~i ;:;_[l~ f'iiZz ?j,:!!Z .J>,.8N -I ri1 j~I ~-lo ACDC/l Z §' . ~ (JI 8M o ~ i. ~ fT1"1: z z l> 0 Zrr, ;;o G) < 0 ·z o "'ui -u >-~ " " C: " z >- -I =l 0 z z <D c;) -< " en =i m -< () 0 ~ ~ "' "' z 6 z en ~if';r' "' " •• fT1 fT1 " zo ~ --< >->s O ou ~ z z ;o " - " cii ~ "' ~~ " " " >-"' u, '-I ~z ~ z s::: )> z nl () Zm )> 0 z )> () :a m :a ~~ m :a 0 c;) z c;) I QZ("T]!!:: Crtl;>:'5)> ::;:J:E~z ::t,.wzM F~0~ ;;oAwz fTIU)>o -U-;Zm ~)>AO ;;o~Vl:.:O <.nc~~ ~Q:19 =lcz ON" z:,.· )>g~ Zz-u O• >- Si 35 30 "' "' §! 125 >- ~ z ~ 20 " w ~ L ~ w w 15 ~ 15' VEGETATION FREE ZONE 3' (VFZ) r TOP DRESS \\lTH I TOPSOIL AND i HYSROSEED IN VFZ ARMOR STONE (VOIDS FILLED 'MTH GRAVEL AND COBBLE) RIPARIAN BENCH PLANTING BENCH WIOlH VARIES -\GEOTEXTILE FABRIC ~~~~~TREES ~~~--SHRUBS ~---PLACE GRAVEL/ SOIL MIX ON BENCH r----PLANTING +19.0" sz OHW EL 23.4' NAVDBB ,---APPROXIMATE SUMMER WATER EL+1a.6' DREDGE AREA 1' OVERDREOGE ALLOWANCE]-- 35 30 ;;;- ~ 2s 3. >- ~ g 20 ~ 15 70 120 130 10 ·-~ ]4ll BO 90 100 DISTANCE. FT 110 10 SECTION A: SECTION AT RIPARIAN BENCH WITH TREES AND SHRUBS SCALE: 1" = 10' 35 30 25 20 15' VEGETATlON FREE ZONE 10· 3' (VFZ) TOP DRESS WITH TOPSOIL AND HYSROSEED IN VFZ ~----IUVE STAKE PLANTING - 'MLLOW AND REDT'MG DOGWOOD SPECIES ~----GRAVEL/ SOIL MIX ~ OHW EL 23.4' NAVD88 ical 0 5 SCALE IN FEET .-----APPROXlMA lE SUMMER WATER EL+18.6' cJ ~I I EXISTING CONCRETE SLABS TO BE REMOVED 8.0. DREDGE CUT El. VARIES _{ELt~-~'.6' SHOYIN) 15 BEDDING STONE 10 70 BO 90 100 DISTANCE. FT 110 SECTION B: SECTION AT BENCH WITH LIVEST AKE PLANTING (t SCALE: 1" = 10' 120 130 ical 0 5 SCALE IN FEET 10 140 10 35 30 "' "' §! 2s _g_ t g 20 ~ ;;J 15 10 ' Cl) _"'1 3i co -I I\) ~ :n OI m 0 " "' N (880flVN) 1.:1 'NOUVA313 0 N "' ------~---------~:a " z <= "' x w g V, z 0 a; < " " z <= "' x w ~ 0 " w " OW w~ "-a, "-a, -,:O [E !(_ ~ ~~ ""' a, " .1: " oc8 " a, o~. ow Zic "' V, a " " 0 w "' "' "' §! < z " " I I ~ ~ I I g I I " z Bi x w 0 N I _l~! uf:Ja~~ ~~c::fd::E ~ti;oBi8 :'i~~~"' iF'~ g! iEi:J8~ '-' m 3:oe> " a, < "- 0 w a, ::, < w lo i!J "'"' "'a, '-'~ -~ '°« . " <O" (88MVN) 1.:1 'NOl!VA313 0 " a <O 0 "' t ui 0 C, ... z 0 " ;'.': "' iS w ::.:::: ~ Cl) w > :::J 0 z <( (!) z 0:::: w ; I Cl) => 0:::: co I I-s: I (.) z w co z <( 0:::: a: 0:::: ~ z 0 t5 2 "' 0 w C/)0 (.)~ II Z= o~ -LU I-...J (.) <( WU Cl) U) >-w I!' " ".J < C, V, PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT LOCATION: 4T 29' 37.00"N, 122· 12' 48.D2~W ADJACENT PROPERTY OWERS· DATUM· NAVD88 CEDAR RIVER MAINTENANCE DREDGING 1. CITY OF RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F &: K INVESTEMENTS WILLIAMS AYE) 9. HE1Th1AN -BODEN, S 10. AMBROSE, K PLANTING SECTIONS APPLICATION BY: CITY OF RENTON S7, 17, 18 T23N R5E PROPOSED: MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER: ll:t_ CEDAR RIVER AI;_ RENTON 1Q!J1iit_ KING SHEET 26 OF 29 STATE: WASHINGTON M.[E;_ 2/3/14 f-"'"''" ,.; ~ :§ 8 ~Rl:r!f2 > > EzoZJTJ~ ~8obro 0 . · Vl~~Z~"TJ .,._IS: >~~~~RI ~F,'j~ <3::=JQ z N>z .5(1locn--1 m::or:;:\ ~z_::::10~ 0 oz (J1 Vlrr1:S:::: (.,j :::u J> (Jl(')Vl~ ;-JJT1~ ;tj ~ :t&~(Tl zc1 0 Q!D?J;-J?' !-JI • g"T'I ~I"'Tlr;:E>::O ~zg:i S:::JT1 l'Tl)>Cl'TJ .-un !)lj/::'f','__,ozi ,:;~6 o> :;,;;:zo -~ z ~zz ,;-.,2':!z > -"'nN . I;;;; d~6 b--18 A(IJUl z C" N @;;i O \l! i ~ rri3: Z Z > 0 .z~ ::o o < 8 ,. ~ ~ C: \; =' 0 z rn " C, ~ 0 ~ "' !;! ci z "'vi ""U s;: ~ r ~ ~ m !!l ...... ~;~r' "'n •. JT1 JT1 N ZO " ---< ,. 03~::oz "'Tl z ;u C " -"' N w ~~ N ,S ~~ '-I ~; iii rn "'"' ~ ~o Zm ~CJ 0~ m:n 0< :n m m :n 8 z C> I QZJT13: C:rTJX> :;f:evi z :i:-cog;:;i :=~Qt: ;:oAcoz ca~~~ ~>;;,:::o ::O!;!!(/J:;o VlC-if"Tl N>O ,. me> ::::1EZ ON<> z,-· ,. =loo zOCfJ O•z> a; CONIFER TREES SYMBOL SCIENTIFIC NAME PCL PJNUS CONTORTA 'LATIFOLIA' PM PSEUOOTSUGA MENZESII TP THUJA PLICATA DECIDUOUS TREES SYMBOL SCIENTIFIC NAME AGm ACER GLABRUM FL FRAXINUS LATIFOLIA MF MALUS FUSCA SL SALIX LUCIDA SHRUBS SYMBOL SCIENTIFIC NAME AA AMELANCHIER ALNIFOLIA cs CORNUS STOLONIFERA HO HO~ODISCUS DISCOLOR LI LONICERA INVOLUCRATA PN PHYSOCARPUS CAPITATUS RS RIBES SANGUlNEUM RN ROSA NUTKANA RP ROSA PISOCARPA RSS RUBUS SPECTABILIS ss SALIX SCOULERLANA GAUL THERLA SHALL ON MA MAHONIA AQUIFOLIUM SYMPHORICARPOS ALBUS ATHYRIUM FILlX-FEMINA COMMON NAME LODGEPOLE PINE DOUGLAS FIR I WESTERN RED CEDAR COMMON NAME DOUGLAS MAPLE OREGON ASH PACIFIC CRABAPPLE PACIFIC \MLLOW COMMON NAME SERVICEBERRY REDOSIER DOGVvOOD OCEANSPRAY TWINBERRY PACIFIC NINEBARK RED FLOWERING CURRANT NOOTKAROSE CLUSTERED WILD ROSE SALMONBERRY SCOULER'S WILLOW SALAL TALL OREGON-GRAPE SNOWBERRY LADY FERN SIZE CONDITION SGAL CONTAINER SGAL CONTAINER SGAL CONTAINER SIZE CONDITION - 5GAL CONTAINER 5GAL CONTAINER 5 GAL CONTAINER 5GAL CONTAINER SIZE CONDITION 1 GAL CONTAINER LIVESTAKE 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER LNESTAK.E 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER 1 GAL CONTAINER NOTES 1. IN PROXIMITY OF THE AIRPORT RUNWAY USE ONLY AIRPORT APPROVED NATIVE PLANTS. SPACING AS SHOVJN AS SHO\r'v'N AS SHO\NN SPACING AS SHOWN AS SHOWN AS SHOWN AS SHOWN SPACING 6'0.C. 6'0.C. 6'0.C. 6'0.C. I 6'0.C. 6' o.c. I 6'0.C. 6' o.c 6'0.C. B' O.C. 3' O.C 6' o.c 3' O.C. 3'0.C ~ ~ _::::i iii g z ~ I I ~ ~~~~1 ~ . ~8~~:c!Q> > != z oz(T'I::;! ;;godcao~ ·· ·· SEED MIX 1 [YVET MEADOI/V) -APPLY AT A RATE OF 112 LBS/ 1000 SQ.FT ~~~Z~"TJ ~:r:~ Z:;u"TJZ:;u ...J>> ~ ~~~G)~ ~~z COUNT SCIENTIFIC NAME COMMON NAME .._,l/)oEo-i IC!,:::O;:rl z::100 Oz ~UllTl:i::Zi,. ul:;o> 15% CAREX OBNUPTA SLOUGH SEDGE "'n"':;! I ~l')ii ;d z ocm -< z() o 25% JUNCUS ENSIFOLIUS BULRUSH O~!J:1:-J?J ~ • 6...., · . ;::;zw i:~,,G~~~ ~" 8 5% FESTUCA RUBRA RUBRA VAA. MOLETA RED FESCUE ,1;,,,,r1, MOLETA cnz~ G13!Z>_.,..0N 10% SCIRPUS MICROPCARPUS SMALL FRUITED P1 2 --1::;(r f:D-io BULRUSH I~ 0 o o l11 ;>;;roC/l z c··~ "TJ 8;:.l o !:!! ~ r 15% GLYCERIA GRANDI$ REED tMNNAGRASS f'Tl3: Z Z 0 ,?!'.rr, ::0 G) < g z "'vi 15% AGROSTIS EXARATA SPIKE BENTGRASS 15% HORDUM BRANCHYANTHERUM MEADOW BARLEY s::: ""CJ )> SEED MIX 2 (UPLAND MEADO\N)APPL Y AT A RATE OF 4 LBS/ 1000 SQ. FT. >-~ () " ~ " COUNT SCIENTIFIC NAME COMMO~ NAME C . " ~ >-=i Zm 10% AGROPYRON RIPARIUM STREAMBANK 0 )> 0 WHEATGRASS z r . <D z )> . ,< ~ () ::0 20% BROMUS CARINA TUS CALIFORNIA BROME C, m ::o :l Cl) o-10% DESCHAMPSIA TUFTED HAIRGRASS 0 I ::0 < CAESPITOSA .,, m mm "' ~ ~ 0 ::0 30% EL YMUS GLAUCUS BLUE WILDRYE z ---< 0 0 z I\) _30% FESTUCA RUBRA RUBRA NATIVE RED FESCUE z 0 SEED MIX 3 {LAW'N) APP.LY AT A RATE OF B LBS/ 1000 SQ. FT ~~~Fq ~ COUNT SCIENTIFIC NAME COMMON NAME ---< g . ~ ~ ~ 70% 3 WAY TURF TYPE PERENNIAL RYE N Z O (") OJ --i > rr, . "0 "' 15% CREEPING RED FESCUE oz z z ozrri;:: "Tl 0 ~ '.§ cm~> N ~ rn :;:j:::Ewz ' <D ~ ~ ~ro~;;:j 15% CHEWING FESCUE .. r~(;)5; ;;oAroz ~ fTIU)>(") ~ ""IJ--iZfTI ~~ ;e:>:;,i:;:o ~~~~ _:::::i N>O >-'"" iio N 0e =Jez ON" " >-z,-· -t "' V, ,,_=J,u ~ "-I -z z~C8 .... " o. ,. z d a; 6l z m 0 z "i ::, 0 :,· " < ~ w ~ > Cc, ~....J : ~ C, 5 ::i:-~ =a: ;! C.J ~ ~ PURPOSE: MAINTENANCE OF SECTION 205 FLOOD HAZARD REDUCTION PROJECT I OCATION: 47" 29' 37.00"N, 122· 12' 48.02nW ADJACENT PROPERTY OWNERS· QATIJM· NAYP88 1. CJTY Of RENTON 5. RENTON HOUSING 2. THE BOEING COMPANY AUTHORITY 3. RENTON FACILITIES 6. WASHINGTON DNR AND OPERATIONS CTR 7. LEI, YK 4. CONDOMINIUMS (55 8. F & K INVESTEMENTS WILLIAMS AVE) 9. HEITh1AN -BODEN. S 10. AMBROSE, K ...J ~ ~ uJ ~ ~~ ~. <o Zz w< >-<9 w ~fil Oo D Ow w wO "J: " ilJ u. "' ,.:: Oz J: <( :'.;"' §, ii: '-' w ~ . J: " I-~ wz rw ::,>< r-r-"z ;: " (f) 0 wr . r J: fu ~ w ~a."' ~~ "' w 0 ~~i1i " ::, > r er wr wo r o~~ 0;: "' " '-'=> :J 0 0 =>z z '-'u, "'z J: " ~~ w1o~m s' ~ '-' u. s~ " is b s :s ~ :5w ::, i " " z == a.. :::i: a. "2 o. ~< u. ~ CEDAR RIVER MAINTENANCE DREDGING PLANTING DETAILS AP PUCA TION BY: CITY OF RENTON w i <!) J: "' z C: S7, 17, 18 T23N ASE ...J <( I-w 0 u. l') 0 z ~ i= z X :::i 0.. m :::, er: <!) • z<!l :c ~~ (f) z~ :s ~ 0 z a. "' ~ u. " <( oilj w "'o w 0 Q~ r er: ti "'o I-~.~ z ~"' '-' cc "' a. PROPOSED: MAINTENANCE DREDGING, REPAIR EXISTING BANK STABILIZATION, NEW BANK STABILIZATION AND OUTFALL REPAIRS REFERENCE NUMBER: J!t.. CEDAR RIVER AI;__ RENTON ill!.!t:l1r;_ KING SHEET 29 OF 29 lli.IE;_ WASHINGTON JlAIL 2/3/14 Leslie Betlach - • Plan Review Routing Slip Plan Number: LUAlS-000185 Name: Cedar River Maintenance Dredging Project Site Address: Cedar River from the mouth of the river to Williams Ave. Bridge. Description: The applicant has requested concurrence with a previous issued NEPA and SEPA under file number LUA 97-192 and a Shoreline Exemption for the Cedar River maintenance dredging project. The maintenance dredging is required for the existing Lower Cedar River Section 205 Flood Hazard Reduction Project as required per the USACE Project Cooperation Agreement and project operation and maintenance manual to maintain the flood protection benefits of the federally construction flood control project. The maintenance dredge would occur from the mouth of the Cedar River at Lake Washington upstream 1.23 miles to the Williams Ave. Bridge. The project is located in both Reach A and B of Cedar River which is designated Shoreline High Intensity. The maintenance dredges would remove up to four feet of sediment deposition with a 1 foot over dredge allowance at the maximum and is estimated to remove 125,000 cubic years of sediment. An additional 10,840 cubic yards of material would be needed for bank stabilization and SS,000 cubic yards would be needed for temporary construction berms. In addition to the dredging the project also in cu des maintenance and repair of existing bank stabilization structures and stromwater outfalls and new stabilization as necessary to conduct the dredge. Two wetlands would be impacted which are proposed to be mitigated through mitigation bank credits . In addition compensatory mitigation to offset impacts to fisheries and associated habitat resources are included in the proposal . Vegetation would be removed where necessary in the river and on river banks, including 6 trees. All temporary construction impacts to riparian vegetation would be replanted upon project completion. Review Type: Community Services Review-Version 1 Date Assigned: 04/08/2015 Date Due: 04/21/2015 Project Manager: Vanessa Dolbee Environmental Impact Earth Animals Light/Glare Historic/Cultural Preservation Air Envi ronmenta I Hea I th Recreation Airport Environmental Water Energy/Natural Resources Uti I iti es 10,000 Feet Plants Housing Transportation 14,000 Feet Land/Shoreline Use Aesthetics Public Service Where to enter your comments: Manage My Reviews Which types of comments should be entered: A1 /0 ~ ~//i:rc.Jre o/ Recommendation -Comments that impact the project including any of the Enivornmental Impacts above. rq~ Correction -Corrections to the project that need to be made before the review can be completed and /or requesting submittal of additional documentation and/or resubmittal of existing documentation,~-----------------------... What statuses should be used: ti) a ~O:>d /l?/)(_'t-m__/nc/ud~ a ;5,np// ,i<.rce;-J c. ,jf~'Jj/~ l"a.6.5' ' ,..J..,_,_../_/ ~~Rey,~~ ~ . • . ··-.. ·-·. - . :" P£J ,e_ -CXCA ~/fi.---U tf.c:-z;G£ .. .. ... . ......... ········ ........... . ... -/?.eMt/\ll>t:fP.-1 IP S171/:>t.iiM J¥tf2-i<IIJG loT ~5 lS N~; . . f!.ca;u,;;sr 15 MA:'!:::G· 7D /<ENTON ~/ft.t;1.-7>1STJ2.ICT. -:-~~p oN RIG#rRANK.ur11.--12£D pP--r'stitt+U.i' IJJO~ .~ ON'-'( .. . • J . ::l}wt~(/J~~ s811' s;,UVtMA-flt( .. J>~tt-1& ~~ ! . . . • Au., ~ Nfi7c'l> -pop... 1ut<p R.~ P-/ f?.e;;@P.Jd tMI vJ / ~£> o{).. HtfDP-,o~ · ~ 1;:p Ncr LL% 1M.@tD<;lJJf ~''. plb-~ /43Jl,€7V -({~'5C.U..iG/F-yG /BLtlt=Glaf5S MIX.1 • 1 •• 'fye:!-1fLCM1w> /5.uppuEt<. w1u., ~ 7>1J.otJ1DE"{) By ~s; aV/9/lt}. -ptvv '7Dll-¥,-{flCNrlMl> W/U, @G'f)@vf'J::ED~(Z..Tt/€5€MGA-s ~ ~ lXl/1~01\.I, s-1~ Is\~: Mt11Gl'm~ MONl~~ R€5pr¥1Bll-lT1jOF e1ryop /2-eNTri'-i . . . ~AfltGe 1Jl'\'rtqL 1)i IJ6/ ~N .. ..... . . . ...... . .r Vanessa Dolbee From: Sent: To: Cc: Subject: Excellent! Thank you. Leslie Ledu:A. i',~ Leslie A Betlach Tuesday, April 28, 2015 9:04 AM Hebe Bernardo; Vanessa Dolbee; Kelly Beymer; Vicki Grover Shane Phillips (shane.phillips@hatchmott.com); Joe Callaghan Ucallaghan@geoengineers.com); Ronald Straka RE: [LUAlS-000185-Cedar River Maintenance Dredging Project] SWU Responses to comments Parks Planning and Natural Resources Director City of Renton 1055 South Grady Way Renton, WA 98057 lbetlach@rentonwa.gov Phone: 425-430-6619 From: Hebe Bernardo Sent: Tuesday, April 28, 2015 6:51 AM To: Vanessa Dolbee; Kelly Beymer; Leslie A Betlach; Vicki Grover Cc: Shane Phillips (shane.phillips@hatchmott.com); Joe Callaghan (jcallaghan@geoengineers.com); Ronald Straka Subject: [LUA15-000185-Cedar River Maintenance Dredging Project] SWU Responses to comments Good morning. Thank you for the comments provided on the Cedar River Maintenance Dredge Project. Please see our responses below in red. I believe a meeting is no longer needed, therefore a meeting cancelation will follow this email. Please contact me directly with any questions that you may have. From: Sandra J Pilat Sent: Wednesday, April 22, 2015 10:31 AM To: Vanessa Dolbee; Jennifer T. Henning; Leslie A Betlach Subject: LUA15-000185-Cedar River Maintenance Dredging Project Revise all construction access points to be re-seeded with seed mix 3 (lawn) or a reused mix 3 to include a small percentage of bluegrass-no meadow mix or meadow mix 2. (Sheets 5, 6, 7 and 9 and sheets 19, 20, 21 and 23.) Clarify type of meadow mix (1 or 2) to be used in 'new bank stabilization area" (pg 5) "Mitigation area (pg6) New bank stabilization area (page 7). 1 We will revise the 60-percent construction plans and construction specifications to require bluegrass mix in all disturbed areas as specified above. Cedar River Dredge Comments Page 7 -"Geoengineers SEPA Summary" Floating dredge -remove use of boat ramp right bank to launch barge. Already discussed this would damage ramp and surroundings. Agreed, no launching of barge. We would want to keep open its use for launching work boats though. These would be smaller trailerable boats. Page 8 -Excavator dredge Reminder, if stadium parking lot access is needed, request is made to Renton School District. Boat ramp on right bank utilized for "small" work boats only We will coordinate with Renton School District prior to construction GEOENGINEERS SEPA Summary Drawing index All areas noted for turf repair/restoration with seed or hydroseed. Do not use "Meadow Seed." Please revise to "Fescue/Rye/Bluegrass mix." Specifications/Supplier will be provided by parks division. Fill soil specifications will be provided for these areas by parks division. We will revise the 60-percent construction plans and construction specifications to require bluegrass mix in all disturbed areas as specified above. Side note: Mitigation monitoring responsibility of City of Renton Surface Water Division. 2 ,., Xerox WorkCentre 5875 SMTP Transfer Report Job Status: FAILED Job canceled by user. Job Information Device Name: Sutmissioo Dote: Sul:missioo Time: Images Scanned: Size: Attachment Name: Format Encrypted E-mail Message Settings: Subject From: Reply To: To: 1. _psneros@rentonwJ.gJII CED-Econ-Dev1 04128/15 D8:23AM 4 0 Image-Only PDF No Scan from CED-Econ-Dev-1 nwgdemo@nwghelpdesk.com nwgdemo@nwghelpde9C.com (02013 Xerox Corporation. All Rights Reserved. SMTP Server Address: Xerox@ and XEROX and Design© are trademarks of Xerox Corporation ,n the Un,ted States and/or other countries 10.1.1.2ID25 Vanessa Dolbee From: Sent: To: Cc: Subject: Attachments: Karen and Misty, Vanessa Dolbee Friday, April 10, 2015 9:19 AM 'Karen Walter'; 'mbla461@ECY.WAGOV' Hebe Bernardo Cedar River Maintenance Dredge OS-Site Plan -JARPA + Drawings.pdf /))A[S -CCYJ/9:S I know you both recently received a letter from the City of Renton's Storm water Division related to the Cedar River Maintenance Dredge Project, which included the Division's proposed mitigation plan. I am sending you this e-mail to inform you that the Stormwater Division has requested concurrence from the City's Environmental Review Committee that the existing NEPA/SE PA EIS for the dredge project is still applicable to the maintenance dredge and they have requested a Shoreline Exemption for the project. I am sure you both are aware, that the SEPA concurrence and SM£ does not have any officio/ public/agency comment periods. However, I want' to make sure you both were aware that this application has been submitted. I have attached the JAR PA materials for your reference. If you have any questions please let me know. Thank you, 'Vanessa '1Jo[6ee, Current Planning Manager Community & Economic Development Department Planning Division 1055 S Grady Way Renton, WA 98057 {425)430-7314 1 Vanessa Dolbee From: Hebe Bernardo Sent: To: Thursday, April 09, 2015 12:57 PM Vanessa Dolbee Subject: FW: Notice of Application and Acceptance; Cedar River Maintenance Dredging Project- LUA15-000185, SME Attachments: Acceptance Letter_15-000185.pdf; NOA_Cedar River 205 Dredge and Leves_ 15-000185.pdf Follow Up Flag: Flag Status: Hi Vanessa) Follow up Completed Following up with our conversation from this afternoon related to the amount of materials included in the NOA. The proposal is to utilize some of the dredged material (approximate 125,000 cubic yards) for the construction of the temporary berms. Thanks a lot Vanessa. From: Sabrina Mirante Sent: Thursday, April 09, 2015 11:15 AM To: Hebe Bernardo; Gregg A. Zimmerman; Ronald Straka Cc: Vanessa Dolbee; Jennifer T. Henning Subject: Notice of Application and Acceptance; Cedar River Maintenance Dredging Project-LUAlS-000185, SME Please see letter of acceptance and notice of application for: Cedar River Maintenance Dredging Project, LUA15-000185, SME. Please let me know if you have any questions. Sabrina Mirante, Pfanning Secretary City of Renton I CED I Planning Division 1055 S Grady Way I 6th Floor I Renton, WA 98057 Phone: 425.430.6578 I Fax: 425.430.7300 I smirante@rentonwa.gov 1 On the 8th day of April, 2015, I deposited in the mails of the United States, a sealed envelope containing Notice of Application and Acceptance documents. This information was sent to: Hebe Bernardo Contact Gregg Zimmerman City of Renton Parties of Record See Attached (Signature of Sender): STATE OF WASHINGTON ------------------------,~,_ '\·,-,'.\·,·, .• .:..-'' -;._'-y Poli,: ) .::--,..o......t''''"\\'\'1• (> __ ::-"'<.. ,7.t,lO/ti i:_'11,, ~ ) SS ;· fo +OT~-t ti\ If, COUNTY OF KING ) ;<., -• _,. i~ -uii j ; ; ..-4 ~ "'°c, e,. = - I certify that I know or have satisfactory evidence that Sabrina Mirante · ~ \,,,f;29~\1/ J · signed this instrument and acknowledged it to be his/her/their free and voluntary act for fl(Djl!l!!9'9'1'1~'1p0ses mentioned in the instrument. WAS\'\ . • Dated: v\: '1bd 8' .10/5" ' I Notary (Print): ____ Uw~.£.J.J,1+--''P----""l'J)U-"'-'efi;:......_ ___________ _ My appointment expires: ,-l.4' ~ ix q 1 [).O (9 CEDAR RIVER MAINTENANCE DREDGING PROJECT LUAlS-000185, SME template -affidavit of service by mailing Mark Pywell 200 Mill Ave S Renton, WA 98055 Paul B Crane The Boeing Company PO Box 3707, MS 63-01 Seattle, WA 98124 Ross Hathaway 200 Mill Ave S Renton, WA 98055 Mary Martz US Army Corps of Engineers Environmental Resources Section PO Box 3755 Seattle. WA 98124 Denis Law C' -----~M:a:yo:r ___ ................ r Ity O t April 7, 2015 Hebe Bernardo City of Renton 1055 S Grady Way Renton, WA 98057 -1~~trW'tl Community & Economic Development Department C.E."Chip"Vincent, Administrator Subject: Notice of Complete Application Cedar River 205 Dredge and Leves, LUAlS-000185, SM Dear Mr. Bernardo: The Planning Division of the City of Renton has determined that the subject application is complete according to submittal requirements and, therefore, is accepted for review. Prior to that review, you will be notified if any additional information is required to continue processing your application. Please contact me at (425) 430-7314 if you have any questions. Sincerely, Vanessa Dolbee Current Planning Manager cc: Ron Straka, Surface Water Utility Engineering Manager Renton City Hall • 1055 South Grady Way • Renton,Washington 98057 • rentonwa.gov () NOTICE OF APPLICATION A Master Application has been filed and accepted with the Department of Community & Economic Development (CED) -Planning Division of the City of Renton. The following briefly describes the application and the necessary Public Approvals. DATE OF NOTICE OF APPLICATION: April 7, 2015 PROJECT NAME/NUMBER: Cedar River 205 Dredge and Levees/ LUAlS-000185, SME PROJECT DESCRIPTION: The applicant has requested concurrence with a previous issued NEPA and SEPA under file number LUA97-092 and a Shoreline Exemption for the Cedar River maintenance dredging project. The maintenance dredging is required for the existing Lower Cedar River Section 205 Flood Hazard Reduction Project as required per the USACE Project Cooperation Agreement and project operation and maintenance manual in order to maintain the flood protection benefits of the federally constructed flood control project. The maintenance dredge would occur from the mouth of the Cedar River at Lake Washington upstream 1.23 miles to the Williams Ave. Bridge. The project is located in both Reach A and B of Cedar River which is designated Shoreline High Intensity. The maintenance dredges would remove up to four feet of sediment deposition with a 1-foot over dredge allowance at the maximum and is estimated to remove 125,000 cubic years of sediment. An additional 10,840 cubic yards of material would be needed for bank stabilization and 55,000 cubic yards would be needed for temporary construction berms. In addition to the dredging the project also includes maintenance and repair of existing bank stabilization structures and stormwater outfalls, and new stabilization as necessary, to conduct the dredge. Two wetlands would be impacted which are proposed to be mitigated through mitigation bank credits. In addition, compensatory mitigation to offset impacts to fisheries and associated habitat resources, are included in the proposal. Vegetation would be removed where necessary in the river and on river banks, including 6 trees. AH temporary construction impacts to riparian vegetation would be replanted upon project completion. PROJECT LOCATION: Cedar River from the mouth of the river to Williams Ave. Bridge. PERMITS/REVIEW REQUESTED: Shoreline Exemption APPLICANT/PROJECT CONTACT PERSON: Hebe Bernardo/City of Renton/1055 S Grady Way Renton, WA 98057 / 425-430 7264 If you have questions about this proposal, or wish to be made a party of record and receive additional notification by mail, contact the Project Manager Vanessa Dolbee, Current Planning Manager, at (425) 430-7314. Anyone who submits written comments will automatically become a party of record and will be notified of any decision on this project. If you would like to be made a party of record to receive further information on this proposed project, complete this form and return to: City of Renton, CED, Planning Division, 1055 South Grady Way, Renton, WA 98057. File Name/ No.: Cedar River 205 Dredge and Levees/ LUAlS-000185, SME NAME:-------------------------------- MAILING ADDRESS: ________________ City/State/Zip:----------- TELEPHONE NO.: ------------- ' '" --·---~~~ ,.,;.'-"'"'""'"'''"""~ ( ' ) _r PLEASE INCLUDE THE PROJECT NUMBER WHEN CALLING FOR PROPER FILE IDENTIFICATION DATE OF APPLICATION: NOTICE OF COMPLETE APPLICATION: MARCH 23, 2015 APRIL 7, 2015 If you would like to be made a party of record to receive further information on this proposed project, complete this form and return to: City of Renton, CED, Planning Division, 1055 South Grady Way, Renton, WA 98057. File Name/ No : Cedar River 205 Dredge and Levees/ LUAlS-000185, SME NAME:---------------------------------- MAILING ADDRESS: _________________ City/State/Zip:----------- TELEPHONE NO.: --------------- City of Renton RECEIVED MAR 2 3 2015 CITY OF RENTON LAND USE PERMIT MASTER APPLICATION PLANNING DIVISION PROPERTY OWNER(S) PROJECT INFORMATION PROJECT OR DEVELOPMENT NAME: NAME: City of Renton Cedar River Maintenance Dredging Project ADDRESS: 1055 S Grady Way PROJECT/ADDRESS(S)/LOCATION AND ZIP CODE: Starting at upstream side of the North Boeing Bridge (47.500048 N/-122.21589 W) going upstream on the Cedar CITY: Renton, WA ZIP: 98057 River approximately 1.23 miles to the Williams Ave Bridge (47.484361 N/-122.206477 W). Renton, WA 98057 TELEPHONE NUMBER: 425-430-7248 KING COUNTY ASSESSOR'S ACCOUNT NUMBER(S): 072305-HYDR, 182305-HYDR, 172305-HYDR APPLICANT (if other than owner) EXISTING LAND USE(S): NAME: Watercourse and ffood control PROPOSED LAND USE(S): COMPANY (if applicable): Watercourse and ffood control EXISTING COMPREHENSIVE PLAN MAP DESIGNATION: ADDRESS: Employment Area Ind., Urban Center No., Urban Center Downtown, Resid. Multifamily, Resid. Medium Densitv PROPOSED COMPREHENSIVE PLAN MAP DESIGNATION CITY: ZIP: (if applicable): NIA EXISTING ZONING: Urban Center -North 2, Industrial- TELEPHONE NUMBER: Medium, Industrial-Light, Resid. 10 dulac, Resid. 8 dulac, Center Downtown, Residential Multi-Familv Urban Center CONTACT PERSON PROPOSED ZONING (if applicable): NIA NAME: Hebe C. Beranardo SITE AREA (in square feet): -1,300,000 SF SQUARE FOOTAGE OF PUBLIC ROADWAYS TO BE COMPANY (if applicable): City of Renton DEDICATED: NIA SQUARE FOOTAGE OF PRIVATE ACCESS EASEMENTS: ADDRESS: 1055 S Grady Way NIA PROPOSED RESIDENTIAL DENSITY IN UNITS PER NET CITY: Renton, WA ZIP: 98057 ACRE (if applicable): NIA TELEPHONE NUMBER AND EMAIL ADDRESS: NUMBER OF PROPOSED LOTS (if applicable): NIA 425-430-7264; hbernardo@!entonwa.g_ov NUMBER OF NEW DWELLING UNITS (if applicable): NIA H:\File Sys\SWP -Surface Water ProjectsiSWP-27 -Surface Water Projects (CIP)\27-3634 Cedar River Maintenance Dredge\1400 PERMITS\COR _ SHORELINES\masterapp-FIJ\AL -20150317.doc -I -03/l I PR.CT INFORMATION conti NUMBER OF EXISTING DWELLING UNITS (if applicable): PROJECT VALUE: $7,800,000 NIA SQUARE FOOTAGE OF PROPOSED RESIDENTIAL BUILDINGS (if applicable): NIA IS THE SITE LOCATED IN ANY TYPE OF ENVIRONMENTALLY CRITICAL AREA, PLEASE INCLUDE SQUARE FOOTAGE (if applicable): SQUARE FOOTAGE OF EXISTING RESIDENTIAL BUILDINGS TO REMAIN (if applicable): NIA SQUARE FOOTAGE OF PROPOSED NON-RESIDENTIAL D AQUIFIER PROTECTION AREA ONE D AQUIFIER PROTECTION AREA TWO BUILDINGS (if applicable): NIA SQUARE FOOTAGE OF EXISTING NON-RESIDENTIAL BUILDINGS TO REMAIN (if applicable): NIA NET FLOOR AREA ON NON-RESIDENTIAL BUILDINGS (if applicable): NIA D FLOOD HAZARD AREA D GEOLOGIC HAZARD D HABITAT CONSERVATION -1.300,000 sq. ft. ___ sq.ft. -750.000 sq. ft. D SHORELINE STREAMS & LAKES -750,000 sq. ft. NUMBER OF EMPLOYEES TO BE EMPLOYED BY THE NEW PROJECT (if applicable): NIA D WETLANDS 2,710 sq. ft. LEGAL DESCRIPTION OF PROPERTY (Attach legal description on separate sheet with the following information included) SITUATE IN THE _ QUARTER OF SECTION 7 17 & 18 , TOWNSHIP 23 N , RANGE 05 E , IN THE CITY OF RENTON, KING COUNTY, WASHINGTON AFFIDAVIT OF OWNERSHIP I, (Print Name/s) ;R/1,,/,,' J ~--k , declare under penalty of perjury under the laws of the State of Washington that I am (please check one) __ the current owner of the property involved in this application or_)/.__ the authorized representative to act for a corporation (please attach proof of authorization) and that the foregoing statements and answers herein contained and the information herewith are in all respects true and correct to the best of my knowledge and belief. Signature of Owner/Representative STATE OF WASHINGTON ) COUNTY OF KING ) ss ) Date I certify that I know or have satisfactory evidence thatj<,.:;, N"'-'--b ".\' , c:;,J l>,,.A)';...J\ signed this instrument and acknowledge it to be his/her/their free and voluntary act for the uses and purpose mentioned in the instrument. Notary Public in and for the S ::,frq I 1,;-• Notary (Print):~-._ SJ/\ 3: ' r \\..~ !, f;) N My appointment expires: _(_0_-+}_l_'\--'-+\~(~S~---------- H:\File Sys\SWP -Surface Water Projects\SWP-27 -Surface Water Projects (CIP)\27-3634 Cedar River Maintenance Dredgc\1400 PERMITS\COR_SHOREUNES\masterapp (2).doc -3 -03/1 I i Project Narrative Cedar River Maintenance Dredging Project City of Renton Public Works-Surface Water Utility Fair Market Value of Project: $7,800,000 Anticipated Dates of Work: June 15 through August 31, 2016 RECEIVED MAR 2 3 2015 CITY OF RENTON PLANNING DIVISION Project Location: The project is located in Renton, Washington, on the Cedar River from the mouth at North Boeing Bridge (47.50048 N lat./ -122.21589 W long.) upstream (south) to the Williams Avenue Bridge (47.484361 N lat. /-122.206477 W long.). The project site is approximately 1.23 miles in length along the Cedar River and is located within Sections 7, 17 and 18 of Township 23 N and Range 05 E of the Willamette Meridian. Project activities will take place primarily on publicly owned properties (King County Tax Parcel Numbers 072305-HYDR, 182305-HYDR, 172305-HYDR). Permits: The City of Renton is requesting a Shoreline Exemption for the project because the proposed maintenance dredge is considered normal maintenance and repair of existing structures or developments. The City is also coordinating with the following regulatory agencies to obtain other environmental permits: U.S. Army Corps of Engineers for Section 404 of the Clean Water Act, National Environmental Policy Act (NEPA) approval, Section 106 of the Historic and Cultural Preservation Act, and Section 7 of the Endangered Species Act; Washington Department of Ecology for Section 401 of the Clean Water Act; Washington Department of Natural Resources for an Aquatic Lands Lease; Washington Department of Fish and Wildlife for Hydraulic Project Approval; and City of Renton for State Environmental Policy Act (SEPA) approval, Critical Areas Ordinance, and other local construction permits. Project Description: The proposed project is maintenance of the US Army Corps of Engineers (USACE) Lower Cedar River Section 205 Project (the project) for Flood Hazard Reduction in and along the lower 1.23 miles (2000 m) of the Cedar River in Renton, Washington. The project consists of an actively maintained (dredged) river channel, and system of levees and floodwalls that provide protection to the lower river and its extensive industrial and commercial development, including the Renton Municipal Airport and the Boeing Company facility. Following the most recent dredging operation performed in 1998 by USACE, the river bed has continued to fill with native river sediment composed primarily of gravel. This proposed maintenance project was identified in the original 1998 project permitting and design. Continued deposition in the river channel is expected to reduce the level of flood protection below the required 100-year flood recurrence event of the project flood protection system in the next two to three years, or sooner. Therefore, the City has initiated the planning and preliminary design for maintenance dredging of the river and other necessary maintenance actions to obtain construction permits with sufficient time to maintain the 100-year flood protection. Maintenance dredging will take place within the limits and grades of previous dredging work as permitted within the original National Environmental Policy Act (NEPA) Environmental Impact Statement (EIS). Maintenance dredging will be performed to maintain the project flood protection benefits, as required in the Project Cooperation Agreement (PCA) Operation & Maintenance Manual between the City of Renton and the U.S. Army Corps of Engineers. The threshold for periodic maintenance dredging is based on ensuring flood protection against the 100-year recurrence interval event, with at least 90 percent reliability. As the bed approaches the specified allowable elevation, anywhere within the project, provisions are to be made for channel dredging to maintain the design level of protection. During maintenance dredging actions, the Cedar River channel within the project area will be excavated to a depth of approximately 4 feet on average below the "Allowable Average Channel Bed Profile" as defined in the PCA. The transition slope area will extend from Logan Ave. upstream to Williams Avenue. The maximum transition area slope will be approximately 0.63%. Transition slope will gradually reduce the dredge cut from the designed dredged channel bottom at Logan Avenue upstream to Williams Avenue where it will meet the existing river bed level. The proposed maintenance dredge action is similar in scope (depth and plan extents) to the Corps of Engineers 205 project that was permitted in 1998, which also analyzed maintenance dredging. The project extents (width and depth of the dredge cut) along the river (North Boeing Bridge to Williams Avenue, or Station 0+00 to 64+85) will be slightly smaller than the 205 project proposed and constructed in 1998 (dredging will actually terminate downstream of Williams Avenue, at Station 64+37.65). The dredge depth will strictly adhere to the average depth of 4 feet (below allowable average channel bed profile) with a 1-ft over-dredge allowance and will not exceed the depths permitted in the 1998 project. The total volume of dredged material is estimated to be approximately 125,000 cu yds including contingency for sediment accumulation between the May 2013 channel survey and the conditions at the time of the proposed dredging in 2015 (average accumulation of 9,700 cy per year in project area). For discussion purposes, the river is segmented into three reaches: 1. North Boeing Bridge to South Boeing Bridge (Stations 0+00 to 39+00) 2. South Boeing Bridge to Logan Ave. (Stations 39+00 to 56+00) 3. Logan Ave. to Williams Ave. (Stations 56+00 to 64+85) Width of the maintenance dredging will vary depending on location within the project area. The channel bottom cut will be 90 feet wide at the north in Reach 1, narrowing in intervals along the project length to 60 feet channel width at the upstream limit in Reach 3. Dredge widths have been narrowed relative to the 1998 dredge to prevent undermining of existing flood control structures and river banks. Dredged side slopes will be 3H:1 V unless otherwise required for local bank stabilization maintenance work or if required for geotechnical or structural stability of existing infrastructure (Bridges and I-Walls). Bank stabilization work is proposed as an element of maintenance of the USACE 205 Flood Control project. Bank stabilization is limited to those areas of the flood control project requiring stabilization (levees and floodwalls) based upon engineering analysis and design standards set forth by USACE. Bank stabilization for non-essential flood control project features are not proposed as part of this project. Bank stabilization work is composed of the following types of work: • Maintenance -Minor restoration of portions of displaced rock on existing bank stabilization features while access to the areas is provided during the dredging work. • Repair -Replacement and reconstruction of existing deteriorated and failing bank stabilization features. ' • New Stabilization -Installation of new stabilization measures to ensure protection of flood control I-Walls and levees. Numerous stormwater outfalls (both active and abandoned) are located within the project area and consist of various sizes and types including concrete, plastic, and corrugated metal. Of these outfalls, approximately 20 are fitted with backflow prevention devices (tideflex valves) to protect upland areas against river flooding. As part of the work and in conjunction with dredging and bank stabilization, repair to damaged outfalls will occur. Because the river has continued to accumulate sediment some existing outfalls are buried and may require local excavation to uncover, assess, and refit damaged backflow prevention valves and pipes. Maintenance of existing outfalls will included in-kind replacement of existing damaged or deteriorated systems including tideflex valves and sections of outfall pipe. Removal of accumulated sediment from active outfalls may be performed as needed. It is estimated that up to 30 outfalls may require some level of repair and maintenance, but this number will not be known until during construction. Where active outfalls pass through bank stabilization (repair, maintenance, or new) modifications of the outfall location may be required by extending or cutting off outfall pipe to match proposed site conditions. Damaged pipes that penetrate through the existing flood walls will require replacement and refitting as necessary. Abandoned exposed outfalls extending into the river will be cut-off and disposed of offsite, as feasible, when encountered. Due to the accumulation of sediments along the lower reach of the river, the exact number of damaged and exposed outfalls will not be known until construction begins. Baseline Conditions: Several riverine wetlands (vegetated sand and gravel bars) that have formed since the last dredge in 1998 have been identified in shallow areas below the OHWM of the Cedar River within the project reach. One additional depressional wetland has been identified within the floodplain but is above the OHWM and will not be impacted by the project. The wetland report contains additional details. Vegetation below the OHWM is generally limited to riverine wetland areas at the channel margin, which are dominated by reed canarygrass with some yellowflag iris. Riparian vegetation includes Japanese knotweed, Himalayan blackberry, Scotch broom, tansy, butterfly bush, field bindweed, English ivy, native willows, bigleaf maple, red alder, and horsetails. Much of the riparian buffer on the east bank (river right) is affected by park landscaping including mowed grass and native shrubs such as Nootka rose, black twinberry, Oregon grape, Pacific ninebark and other species. The river within the project reach has levees and floodwalls on both sides for flood protection. Banks have been armored with a flood wall, riprap, concrete rubble, and/or gabion baskets. Much of the armoring is currently failing. Riverbed sediment consists primarily of cobbles, gravels and with a small fraction of finer materials (sand and silt). Project Impacts: Riverine areas will be affected by project activities. Impacts to riparian habitat are addressed in the project Mitigation Plan. Estimated dredge and fill quantities are provided in the table below. Table 1. Dredge and Fill Quantities Activity Duration of impact' Amount of material (cubic yards) Dredge Temporary (8 weeks) Approximately 125,000 removed Temporary Construction Berms Temporary (8 weeks) 55,000 CY Bank Stabilization (maintenance) Permanent 740CY Bank Stabilization (repair) Permanent 8,630 CY Bank Stabilization (new) Permanent 1,470 CY Fill material for the temporary construction berms will include excavated gravel material from the channel and may also include a limited amount of imported gravel/cobblefill. Fill for bank stabilization activities will include geotextile fabric, small bedding stone (quarry spalls), and armor rock. Voids in the rock will be filled with native gravel cobble and then a soil/gravel mixture will be placed at the final grade to provide a substrate for native riparian vegetation plantings. Wetlands within the project area consist of seasonally vegetated sand and gravel bars in shallow areas below OHWM and one depressional wetland within the floodplain, but above the OHWM. Where possible, the dredge prism has been designed to avoid riverine wetlands. Only two of the seven wetlands identified in the project area will be impacted by the dredging operation. The two wetlands that will be impacted (dredged) consist of vegetated gravel bars that are transient in nature and contain sparse vegetation on a seasonal basis. These two wetlands (Wetlands D & E) are located near the left bank of the river upstream of South Boeing bridge. Mitigation for impacts to vegetated gravel will be through use of wetland and habitat mitigation bank credits at the Springbrook Creek mitigation bank site. See Mitigation Plan and Bank Use Plan for additional details. Approximately 6 trees will be removed as a result of site access and bank stabilization activities. Impacted trees range from 6" to 12" in diameter and generally consist of red alders and one cottonwood. , I " ~I w r ~' g i w g &l i ~ ) Legend LJ Project Boundary c::::J Parcels RECEIVED MAR 2 3 2015 CITY OF RENTON PLANNING DIVISJO Data Source: Imagery obtained from Microsoft Bing Maps 2013 Projection: WGS 1984 Web Mercator Auxiliary Sphere Notes: 1. The locations of all features shown are approximate. 1,000 0 1,000 -----Fe~ Vicinity Map Cedar River Maintenance Dredge Project Renton, Washington 2. This drawing is for information purposes. It is intended to assist in showing features discussed in an attached document. GeoEngineers, Inc. cannot guarantee the accuracy and content of electronic files. The master file is stored by GeoEngineers, Inc. and will serve as the official record of this communication. GEOENGINEERS CJ Figure 1 ~ ~L_----------------=================='.J PLANNING DIVISION WAIVER OF SUBMITTAL REQUIREMENTS FOR LAND USE APPLICATIONS RECEIVED MAR 2 3 2015 LAND USE PERMIT SUBMITTAL REQUIREMENTS: Calculations 1 Colored Maps for Display• Construction Mitigation Description 2 AND• Deed of Right-of-Way Dedication Density Worksheet 4 Drainage Control Plan 2 Drainage Report 2 Ele\/Btlons, Architectural 3 AMH Environmental Checklist 4 Existing Covenants (Recorded Copy) 4 Existing Easements (Recorded Copy) 4 Flood Hazard Data 4 Floor Plans >AND• Geotechnical Report, NE3 Grading Plan, Conceptual 2 Grading Plan, Detailed 2 Habitat Data Report • Improvement Deferral 2 Irrigation Plan 4 King County Assessor's Map Indicating Site, Landscape Plan, Conceptual• Landscape Plan, Detalled 4 Legal Description 4 Map of Existing Site Conditions 4 Master Application Form• Monument Cards (one per monument) 1 Neighborhood Detail Map 4 Parking, Lot Coverage & Landscaping Analysis 4 Plan Reductions (PMTs) • Post Office Approval 2 This requirement may be waived by: 1. Property Services 2. Public Works Plan Review 3. Building 4. Planning ,..,.,Tl., _I"'------... . WAIVED MODIFIED . . COMfilll!tff~ DIVISION BY: fill) . BY: f/o!Yl AIJ.!Jcy,hM ,........,r:l'-l . ~ . . ,, PRoJEcr NAME: ( c£'/Vb/,& ie/(;/f] ef 7 ;· Janri · DATE: Z/11:/ /5 H:\CEO\Oata\Forms-Templates\SeU-Hetp Handouts\Plannlng\waiverofsubmltlalreqs.Jds 06/09 PLANNING DIVISION WAIVER OF SUBMITIAL REQUIREMENTS FOR LAND USE APPLICATIONS LAND USE PERMIT SUBMITTAL WAIVED MODIFIED COMMENTS: REQUIREMENTS: BY: BY: Plat Name Reservation 4 Preapplication Meeting Summary 4 Public Works Approval Letter, Rehabilitation Plan 4 Screening Detail 4 Site Plan 2 AND• Stream or Lake Study, Standard 4 Stream or Lake Study, Supplemental 4 Stream or Lake Mitigation Plan 4 Street Profiles 2 Title Report or Plat Certificate , Topography Mapa Traffic Study 2 Tree Cutting/Land Clearing Plan 4 Urban Design Regulations Analysis 4 U1illties Plan, Generalized 2 Wetlands Mitigation Plan, Final 4 Wetlands Mitigation Plan, Preliminary 4 Wetlands ReporUDelineation 4 Wireless: Applicant Agreement Statement 2 AND 3 Inventory of Existing Sites 2 AND• Lease Agreement, Draft 2 AND 3 Map of Existing Site Conditions ,AND 3 Map of View Area 2 AND• Photosimulations 2 AND 3 This requirement may be waived by: 1. Property Services 2. Public Works Plan Review 3. Building 4. Planning H:\CED\Data\Fonns-TeJJllleles\Self-Help Handouts\PlannlnCl\walverofsubmiltalreas.xls 06/09