HomeMy WebLinkAboutSR_ERC Report_May_Creek_Trestle_Project_181022.pdfDEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT
Project Location Map
ERC Report_May_Creek_Trestle_Project_181022
ENVIRONMENTAL REVIEW COMMITTEE REPORT
ERC Meeting Date: October 22, 2018
Project File Number: PR18-000304
Project Name: May Creek Trestle Project
Land Use File Number: LUA18-000421, ECF, SMC
Project Manager: Clark H. Close, Senior Planner
Owner: Chris Erickson, King County Department of Natural Resources and Parks, Parks and
Recreation Division, 201 S Jackson St #700, Seattle, WA 98104
Applicant: See Owner above
Contact: Stephanie Modjeski, Otak, Inc., 2731 Westmore Ave, Ste. #300, Everett, WA 98201
Project Location: West of Lake Washington Blvd N near N 41st St (APN 3224059005)
Project Summary: The applicant, King County DNRP Parks Division, is requesting Environmental (SEPA)
Review and a Shoreline Administrative Conditional Use Permit to complete an
expansion of existing over-water trails at May Creek. The May Creek Trestle
Rehabilitation Project includes the repair and retrofit of the existing May Creek trestle
for use as a King County trail bridge. The May Creek trestle is located above May Creek,
approximately 300 feet north of N 41st St, just west of Lake Washington Blvd N. The
project is located in the Residential-10 (R-10) zone. The bridge was historically used as
a railroad bridge and currently still supports railroad tracks. The bridge is planned to
become a part of the multi-use Eastside Rail Corridor in Renton. The May Creek trestle
is approximately 60 feet long and 13 feet wide and is composed of timber
pilings/columns, steel pile caps, timber stringers, timber railroad ties and steel railroad
tracks. The site can be accessed by the trail connecting the trestle via N 41st St.
Site Area: 3,483 square feet
STAFF
RECOMMENDATION:
Staff Recommends that the Environmental Review Committee issue a
Determination of Non-Significance (DNS).
City of Renton Department of Community & Economic Development
May Creek Trestle Project
Staff Report to the Environmental Review Committee
LUA18-000421, ECF, SMC
Report of October 22, 2018 Page 2 of 6
ERC Report_May_Creek_Trestle_Project_181022
PART ONE: PROJECT DESCRIPTION / BACKGROUND
The applicant, King County Department of Natural Resources and Parks, Parks and Recreation Division, is requesting
Environmental (SEPA) Review and a Shoreline Administrative Conditional Use Permit (CUP) to complete an
expansion of existing over-water trails at May Creek. Prior to submitting a Shoreline CUP, King County Parks
prepared a combined Master Plan and Environmental Impact Statement (EIS) document for the Eastside Rail
Corridor Regional Trail Master Plan Project. The combined Draft Master Plan and EIS was published on February 29,
2016 and a combined Final Master Plan was published on July 18, 2016. The King County Parks and Recreation
Division Director selected the Master Plan’s Preferred Alternative alignment on August 1, 2017. As noted in the
“Notice of Action Taken” under SEPA, that trail design and construction would be the subject of future
environmental review and were not governed by the Notice of Action (Exhibit 20).
May Creek is a tributary to Lake Washington that drains the area north of the Cedar River and west of Issaquah
Creek (Exhibit 7). The May Creek Trestle Rehabilitation Project includes the repair and retrofit of the existing May
Creek trestles for use as a King County trail bridge in Renton. The May Creek trestle is located above May Creek,
approximately 300 feet north of N 41st St, just west of Lake Washington Blvd N and approximately 840 feet from the
waters of Lake Washington (Exhibit 2). The trail development project is located in the Residential-10 (R-10) zone.
The bridge was historically used as a railroad bridge and currently still supports railroad tracks. The bridge is planned
to become a part of the multi-use Eastside Rail Corridor in Renton. The Eastside Rail Corridor is a 42-mile rail
corridor that stretches from Renton to Snohomish, the Eastside Rail Corridor passes through Renton, Bellevue,
Kirkland, Woodinville, Redmond, and portions of unincorporated King and Snohomish counties (Exhibit 7). The May
Creek trestle bridge deck span is approximately 60 feet long, 13 feet wide, and 15 feet above the May Creek channel
and is composed of timber pilings/columns, steel pile caps, timber stringers, timber railroad ties and steel railroad
tracks. The site can be accessed by the trail connecting the trestle via N 41st St.
The May Creek Bridge has defects and is deteriorated and requires repairs and retrofits to provide an extended
lifespan and continued use. Trail approaches would be re-graded with existing material. The project would involve
approximately 21 cubic yards (CY) of excavation for removal of the timber back walls and wing walls and there
would be approximately 21 CY of replacement fill, consisting of new timber back walls and gravity block walls. There
would also be approximately 20 CY of temporary fill for the construction entrance. The project would occur above
the ordinary high water mark (OHWM) to repair portions of the trestle that span the stream. Up to four pilings are
proposed to be repaired, using only hand tools and personnel (no motorized equipment), within the OHWM. A small
crane/excavator would be positioned in the Eastside Rail Corridor right-of-way to allow for materials to be
transported to and from the bridge deck. Work would occur above the stream to remove timber ties and tracks and
to install new decking and railing. The May Creek trestle new bridge decking would be constructed of precast
concrete panels and would create approximately 840 square feet of new, non-pollution generating impervious
surface.
The project was originally anticipated to occur in July 2018 with a completion0 date in October 2018. The project is
840 feet from the shoreline of Lake Washington in May Creek Reach A and would not impact flood zones (Exhibit 3).
No wetlands are located within the immediate vicinity of the project site. No trees or woody shrubs would be
removed. The applicant has submitted a Geotechnical Memorandum (Exhibit 5), and Critical Areas Technical
Memorandum (Exhibit 6), and an Ecosystem Resources Inventory (Exhibit 7) with the application.
On April 13, 2018, the City issued a Shoreline Exemption to repair and retrofit two (2) recreational pedestrian trestle
bridges that are planned to become part of the multi-use Eastside Rail Corridor Regional Trail in the Kennydale area
(Exhibit 9).
PART TWO: ENVIRONMENTAL REVIEW
In compliance with RCW 43.21C.240, the following environmental (SEPA) review addresses only those project
impacts that are not adequately addressed under existing development standards and environmental regulations.
City of Renton Department of Community & Economic Development
May Creek Trestle Project
Staff Report to the Environmental Review Committee
LUA18-000421, ECF, SMC
Report of October 22, 2018 Page 3 of 6
ERC Report_May_Creek_Trestle_Project_181022
A. Environmental Threshold Recommendation
Based on analysis of probable impacts from the proposal, staff recommends that the Responsible Officials:
Issue a DNS with a 14-day Appeal Period.
B. Exhibits
Exhibit 1: Environmental Review Committee (ERC) Report
Exhibit 2: Neighborhood Detail Map
Exhibit 3: Flood Hazard Map
Exhibit 4: May Creek Trestle Plan Set (9 Sheets)
Exhibit 5: Geotechnical Memorandum prepared by Otak, Inc.
Exhibit 6: Critical Areas Technical Memorandum (dated February 7, 2018)
Exhibit 7: Ecosystem Resources Inventory, Eastside Rail Corridor Regional Trail Master Plan Project
prepared by Parametrix (dated May 12, 2015)
Exhibit 8: Shoreline Tracking Worksheet
Exhibit 9: Certificate of Exemption (dated April 13, 2018)
Exhibit 10: Muckleshoot Indian Tribe Fishery Division Comments (dated July 9, 2018)
Exhibit 11: Staff Response Letter to Muckleshoot Indian Tribe Fisheries Division (dated July 17,
2018)
Exhibit 12: Project On Hold Notice Letter (dated July 17, 2018)
Exhibit 13: King County Responses to Muckleshoot Concerns (dated October 1, 2018)
Exhibit 14: Off Hold Letter (dated October 2, 2018)
Exhibit 15: Muckleshoot Indian Tribe Fishery Division Additional Comments (dated October 9, 2018)
Exhibit 16: Staff Response Letter to Muckleshoot Indian Tribe Fisheries Division (2) (dated October
16, 2018)
Exhibit 17: Construction Mitigation Description
Exhibit 18: Conditional Use Permit Justification
Exhibit 19: Flood Insurance Rate Map
Exhibit 20: Notice of Action Taken, Eastside Rail Corridor (ERC) Trail Master Plan (dated August 1,
2017)
C. Environmental Impacts
The Proposal was circulated and reviewed by various City Departments and Divisions to determine whether the
applicant has adequately identified and addressed environmental impacts anticipated to occur in conjunction
with the proposed development. Staff reviewers have identified that the proposal is likely to have the following
probable impacts:
1. Earth
Impacts: The applicant submitted a geotechnical memorandum prepared by Otak, Inc. (Otak) that
provides a summary of the May Creek Bridge (bridge) components that interface with the soil (Exhibit
5). According to the memorandum, the existing bridge is founded on timber pilings which would not be
modified in a way that affects their capacity to support the bridge (e.g. embedment depth or bearing
City of Renton Department of Community & Economic Development
May Creek Trestle Project
Staff Report to the Environmental Review Committee
LUA18-000421, ECF, SMC
Report of October 22, 2018 Page 4 of 6
ERC Report_May_Creek_Trestle_Project_181022
capacity). The structure is supported by transverse bents. Each of the five (5) timber pile bents vary in
size from twelve to fourteen inches in diameter. The area of bents is approximately 30 square feet
(Exhibit 8). The existing soils located behind the end bents of the bridge consist of granular material
originally used to support a railroad. The anticipated loads for the trail use are less than the original
railroad loading and would not compromise the approach soils. The applicant is proposing to replace the
rotting timber end walls, which support the approach embankment, in kind. The existing timbers have
been in place for many decades and the new timbers are expected to meet the design life of the interim
trail improvements. Temporary excavation slopes would not exceed the slope of the existing stable
slopes at the sides of the approach embankment. Rotting timber wing walls, which support the
approach embankment, would also be replaced with precast concrete blocks. The concrete blocks would
be more stable than the existing condition and would meet the design life of the interim trail
improvements.
The surface over the bridge and the bridge approaches are flat and the majority of the project area is
flat. The May Creek bridge deck spans 60 feet across and 13 feet wide and the bridge is approximately
15 feet above the water surface elevation of the stream (Exhibit 4). There is a moderate slope from the
bridge approaches to the stream banks below on the north and south sides of the trestle. The steepest
slope at the project site occurs at the north end of the May Creek trestle. The slope is approximately
fifteen percent (15%) from the slope adjacent to the bridge deck surface to the stream bank below. No
fill or excavation would take place below the Ordinary High Water Mark (OHWM) of May Creek. The
pilings are proposed to remain in place. The project would include approximately 21 cubic yards (CY) of
excavation for removal of the timber back walls and wing walls. There would be approximately 21 CY of
replacement fill, consisting of new timber back walls and gravity block walls. Also, the applicant is
proposing approximately 20 CY of temporary fill for the construction entrance.
The majority of the repairs would be conducted using hand tools and a generator would be required for
welding. A small crane would be used within the Eastside Rail Corridor right-of-way for movement of
materials to and from the bridge deck. Minor vegetation disturbance and some temporary erosion could
occur due to exposed soils. The applicant is proposing a temporary erosion and sediment control (TESC)
plan with measures for appropriate construction best management practices (BMPs), such as working
during the dry season, installing silt fencing along the stream bank and installing other flow barriers to
avoid and minimize erosion during construction. Cleared areas would be limited to the stabilized
construction entrance, access road and wheel wash area and high visibility fencing would be used to
protect existing vegetation (Exhibit 16).
It is anticipated that compliance with the City’s critical areas regulations, Shoreline Master Program and
building codes would adequately mitigate for impacts to the construction of structures on this site;
therefore no further mitigation is recommended at this time.
Mitigation Measures: None recommended.
Nexus: Not applicable.
2. Air
Impacts: It is anticipated that some temporary air quality impacts from motorized equipment, such as a
generator for a welder and a small crane and/or excavator for lifting materials to the top of the bridge
deck would occur. Maintenance of the equipment to meet State and Federal air quality emission
requirements and standards would serve to mitigate the potential adverse impacts. After project
completion, there would be no new emissions from the bridge. No further site specific mitigation for the
identified impacts from typical vehicle and construction exhaust is required.
Mitigation Measures: None recommended.
Nexus: Not applicable.
City of Renton Department of Community & Economic Development
May Creek Trestle Project
Staff Report to the Environmental Review Committee
LUA18-000421, ECF, SMC
Report of October 22, 2018 Page 5 of 6
ERC Report_May_Creek_Trestle_Project_181022
3. Water
a. Wetland, Streams, Lakes
Impacts: The applicant submitted a Critical Areas Technical Memorandum prepared by Otak (dated
February 7, 2018; Exhibit 6) with the project application. The submitted memorandum identifies
May Creek below the May Creek trestle with a westerly stream flows. May Creek is a perennial
stream and is classified as a Type S (Shoreline of the State) watercourse per Washington State
Department of Natural Resources (DNR) and the City. The trestle is located above the special flood
hazard area for the 100-year flood event as well as the floodway for May Creek. According to the
applicant, the project would not result in any changes to the floodplain. The proposed work is
associated with installing steel banding on the existing bridge pilings using hand tools, in order to
improve structural integrity of the trestle.
Biologists from Otak conducted a site inspection on November 13, 2017 and no wetlands were
observed onsite or in the immediate vicinity of the project site. Per Renton Municipal Code (RMC) 4-
3-090.B.3.a the jurisdictional area for regulated shorelines includes lands within two hundred feet
(200’), as measured on a horizontal plane, from the OHWM, or lands within two hundred fee (200’)
from floodways, whichever is greater. Repairs to the May Creek trestle would occur over May Creek.
The repairs include retrofitting up to four pilings with steel banding, removing the existing walkway,
tracks, ties, and fencing, and replacing the existing walkway with new timber decking and railings.
Construction equipment would also be located above the stream channel. No fill material would be
placed in any surface water, no dredge material would be removed from any surface water and no
surface water would be withdrawn or diverted as a component of the proposed project.
Any impacts to the stream or buffer areas would be adequately mitigated by the City’s adopted
Shoreline Master Program; therefore, no further mitigation is recommended.
Mitigation Measures: None recommended.
Nexus: Not applicable.
b. Ground Water
Impacts: According to the applicant, no groundwater would be withdrawn and no water would be
discharge to groundwater as a result of the project.
Any impacts to the stream or buffer areas would be adequately mitigated by the City’s adopted
Critical Areas Regulations; therefore, no further mitigation is recommended.
Mitigation Measures: None recommended.
Nexus: Not applicable.
c. Storm Water
Impacts: Under existing conditions, stormwater runoff from the bridge deck of the trestle flows to
May Creek. During construction and repair activities, the applicant is proposing to install erosion
control methods such as temporary silt fencing or other flow barriers to protect water quality in
streams from sediment during stormwater runoff. According to the applicant, upon completion of
the project there would be in no change in stormwater runoff and the project would not alter or
affect drainage patterns in the vicinity of the site.
Any impacts to the stream or buffer areas would be adequately mitigated by the City’s adopted
Shoreline Master Program; therefore, no further mitigation is recommended.
Mitigation Measures: None recommended.
Nexus: Not applicable.
City of Renton Department of Community & Economic Development
May Creek Trestle Project
Staff Report to the Environmental Review Committee
LUA18-000421, ECF, SMC
Report of October 22, 2018 Page 6 of 6
ERC Report_May_Creek_Trestle_Project_181022
4. Wildlife
Impacts: According to The Washington Department of Fish and Wildlife (WDFW) interactive map, known
as Priority Habitat and Species (PHS) on the Web, May Creek includes Fall Chinook (Oncorhynchus
tshawytscha) (federally-listed threatened), Coho (Oncorhynchus kitsutch), and winter steelhead
(Oncorhynchus mykiss) (federally-listed threatened). The project is not expected to have an effect on
instream habitat due to no in-water work being proposed. The project work intends to retrofit existing
pilings of the trestle and replace the decking above May Creek. No impact to wildlife is anticipated as a
result of this project.
Mitigation Measures: None recommended.
Nexus: Not applicable.
5. Environmental Health
a. Noise
Impacts: Noise impacts would primarily result from muffled motorized equipment from a small
crane or excavator and the typical sounds of carpentry. Handheld equipment would be used for
piling repair. Temporary noise would occur from a generator needed for onsite welding. The
equipment noise would be regulated through the City’s adopted noise level regulations per Chapter
8-7, RMC. The City’s noise regulations limit haul hours between 8:30 am to 3:30 pm, Monday
through Friday unless otherwise approved by the Development Services Division. Permitted work
hours in or near residential areas are restricted to the hours between seven o’clock (7:00) a.m. and
eight o’clock (8:00) p.m. Monday through Friday. Work on Saturdays is restricted to the hours
between nine o’clock (9:00) a.m. and eight o’clock (8:00) p.m. No work is permitted on Sundays. The
applicant indicates that all the construction noise impacts are anticipated to occur during daylight
hours. No unusual noise impacts are proposed, which would require further levels of mitigation.
Mitigation Measures: None recommended.
Nexus: Not applicable.
D. Comments of Reviewing Departments
The proposal has been circulated to City Department and Division Reviewers. Where applicable, their comments
have been incorporated into the text of this report and/or “Advisory Notes to Applicant.”
Copies of all Review Comments are contained in the Official File and may be attached to this report.
The Environmental Determination decision will become final if the decision is not appealed within the 14-day
appeal period (RCW 43.21.C.075(3); WAC 197-11-680).
Environmental Determination Appeal Process: Appeals of the environmental determination must be filed in
writing together with the required fee to: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA
98057, on or before 5:00 p.m. on November 9, 2018. RMC 4-8-110 governs appeals to the Hearing Examiner and
additional information regarding the appeal process may be obtained from the City Clerk’s Office, Renton City Hall –
7th Floor, (425) 430-6510.
CITY OF RENTON
DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT
STAFF REPORT TO THE ENVIRONMENTAL REVIEW COMMITTEE
EXHIBITS
Project Name:
May Creek Trestle Project
Land Use File Number:
LUA18-000421, ECF, SMC
Date of Meeting
October 22, 2018
Staff Contact
Clark H. Close
Senior Planner
Project Contact/Applicant
Chris Erickson, King County
Department of Natural
Resources and Parks, Parks
and Recreation Division, 201
S Jackson St #700, Seattle,
WA 98104
Project Location
West of Lake Washington Blvd N
near N 41st St (APN 3224059005)
The following exhibits are included with the ERC Report:
Exhibit 1: Environmental Review Committee (ERC) Report
Exhibit 2: Neighborhood Detail Map
Exhibit 3: Flood Hazard Map
Exhibit 4: May Creek Trestle Plan Set (9 Sheets)
Exhibit 5: Geotechnical Memorandum prepared by Otak, Inc.
Exhibit 6: Critical Areas Technical Memorandum (dated February 7, 2018)
Exhibit 7: Ecosystem Resources Inventory, Eastside Rail Corridor Regional Trail Master Plan Project
prepared by Parametrix (dated May 12, 2015)
Exhibit 8: Shoreline Tracking Worksheet
Exhibit 9: Certificate of Exemption (dated April 13, 2018)
Exhibit 10: Muckleshoot Indian Tribe Fishery Division Comments (dated July 9, 2018)
Exhibit 11: Staff Response Letter to Muckleshoot Indian Tribe Fisheries Division (dated July 17, 2018)
Exhibit 12: Project On Hold Notice Letter (dated July 17, 2018)
Exhibit 13: King County Responses to Muckleshoot Concerns (dated October 1, 2018)
Exhibit 14: Off Hold Letter (dated October 2, 2018)
Exhibit 15: Muckleshoot Indian Tribe Fishery Division Additional Comments (dated October 9, 2018)
Exhibit 16: Staff Response Letter to Muckleshoot Indian Tribe Fisheries Division (2) (dated October 16,
2018)
Exhibit 17: Construction Mitigation Description
Exhibit 18: Conditional Use Permit Justification
Exhibit 19: Flood Insurance Rate Map
Exhibit 20: Notice of Action Taken, Eastside Rail Corridor (ERC) Trail Master Plan (dated August 1, 2017)
FNeighborhood Detail MapColored MapMay Creek Trestle Rehabilitation Project
Date: 4/27/2018
0 400200
Feet1 in = 200 feet
1,128
94
City of Renton Print map Template
This map is a user generated static output from an Internet mapping site and
is for reference only. Data layers that appear on this map may or may not be
accurate, current, or otherwise reliable.
None
5/3/2018
Legend
64032
THIS MAP IS NOT TO BE USED FOR NAVIGATION
Feet
Notes
64
WGS_1984_Web_Mercator_Auxiliary_Sphere
Information Technology - GIS
RentonMapSupport@Rentonwa.gov
Floodway
Special Flood Hazard Areas (100
year flood)
Streams (Classified)
Type S
Type F
Type Np
Type Ns
COVER SHEETC-1Department of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #11/20/17RDRD32499EMAY CREEK & RIPLEY LANE TRESTLESEASTSIDE RAIL CORRIDOR, BELLEVUE, WA.KING COUNTY, WACONTRACT NO. E00341E14OF XRHC ENGINEERINGWWW.RHCENGINEERING.COM720 3RD AVE SUITE 1607SEATTLE WA 98104PH:206.623.5984Department Of NaturalResources and ParksERC - MAY CREEK TRESTLEEASTSIDE RAIL CORRIDORParks and RecreationCITY OF RENTONDivisionVICINITY MAPPROJECTLOCATIONMAY CREEKLOCATIONLOCATION MAPDRAWING INDEX19
MAY CREEK TRESTLE TESCPLANC-22Department of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #8/21/18JLRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 1811241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.comRHC ENGINEERINGWWW.RHCENGINEERING.COM720 3RD AVE SUITE 1607SEATTLE WA 98104PH:206.623.5984 SILT FENCE DETAIL SCALE: N.T.S.SEE CITY OF RENTON SURFACE WATER STD. DETAIL 214.00PROVIDE SILT FENCE IN ACCORDANCE WITH CITY OF RENTONSURFACE WATER STANDARD (SWS) DETAIL #214.00.PROVIDE STABILIZED CONSTRUCTION ENTRANCE INACCORDANCE WITH CITY OF RENTON SWS DETAIL #215.10.INSTALL AND MAINTAIN EROSION CONTROL MEASURES INACCORDANCE WITH CITY OF RENTON SWS DETAILS.THE CITY OF RENTON 2017 SURFACE WATER DESIGN MANUAL.AS DIRECTED BY THE CITY OF RENTON.OCT. 1ST - APRIL 30TH, NO SOILS SHALL BE EXPOSED MORE THAN TWO CONSECUTIVE WORKING DAYS. EXPOSED SOILS SHALL BE STABILIZED AT THE END OF THE WORKDAY, PRIOR TO THE WKND, HOLIDAY OR PREDICTED RAIN EVENT. WKLY MAINT. REPORT TO REQUIRE TO BE SUBMITTED TO CITY OF RENTON.WET SEASON EROSION AND CONTROL MEASURES SHALL BE APPLICABLEFROM OCT. 1 - APRIL 30.*WHERE APPROPRIATE SANDBAGS OR AN EQUIVALENTBARRIER SHALL BE CONSTRUCTED BETWEEN THE PROJECTAREA AND THE SURFACE WATER IN ORDER TO ISOLATE THECONSTRUCTION AREA FROM HIGH WATER THAT MIGHTRESULT DUE TO PERCIPITATION.*113171810/11/18CETO10/11/18
E-1MAY CREEK TRESTLEEXISTING BRIDGE LAYOUTDepartment of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #3/22/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com4K:\project\32400\32499E\CADD\ACAD\Dwg\32499E-SHEETS - EXISTING.dwg, 3/22/2018 12:59:26 PM, DWG To PDF_No_Merge.pc3
E-2MAY CREEK TRESTLETYPICAL BENT ELEVATIONDepartment of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #3/22/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com5K:\project\32400\32499E\CADD\ACAD\Dwg\32499E-SHEETS - EXISTING.dwg, 3/22/2018 12:59:27 PM, DWG To PDF_No_Merge.pc3
S-1MAY CREEK TRESTLELAYOUTDepartment of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #8/21/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com10
S-2MAY CREEK TRESTLE REPAIR AND RETROFIT SEQUENCE1 OF 2Department of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #3/22/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com11K:\project\32400\32499E\CADD\ACAD\Dwg\32499E-SHEETS.dwg, 3/22/2018 2:17:15 PM, DWG To PDF_No_Merge.pc3
S-3MAY CREEK TRESTLEREPAIR AND RETROFIT SEQUENCE2 OF 2Department of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #3/22/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com12K:\project\32400\32499E\CADD\ACAD\Dwg\32499E-SHEETS.dwg, 3/22/2018 2:17:16 PM, DWG To PDF_No_Merge.pc3
S-8PRECAST CONCRETEBRIDGE DECK PANELDETAILSDepartment of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #3/22/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com17K:\project\32400\32499E\CADD\ACAD\Dwg\32499E-SHEETS.dwg, 3/22/2018 2:17:22 PM, DWG To PDF_No_Merge.pc3
S-9BRIDGE RAILING AND FENCEDETAILSDepartment of Natural Resources andParks - Parks and Recreation DivisionCapital Planning and Development201 S. Jackson St, Suite 700Seattle, Washington 98104Tel (206) 296-4232 | Fax (206) 263-6217FILE #REVISIONCHECKEDDRAWNDATEPROJ #3/22/18RPDRPD32499EERC - MAY CREEK / RIPLEY LANETRESTLE REHABILITATIONRENTON, WAKING COUNTY, WA, CONTRACT NO. C01234C18OF 18XX% SUBMITTAL - NOT FOR CONSTRUCTION11241 Willows Road NE, Suite 200Redmond, WA 98052425.822.4446www.otak.com18K:\project\32400\32499E\CADD\ACAD\Dwg\32499E-SHEETS.dwg, 3/22/2018 2:17:24 PM, DWG To PDF_No_Merge.pc3
2731 Wetmore Avenue, Suite 402, Everett, WA 98201 Phone (425) 493-5221 Fax (425) 374-5152 otak.com
Geotechnical Memorandum
A geotechnical report is not necessary for this project. Below is a summary of the bridge components that
interface with the soil and a description of how the design is not dependent on geotechnical investigation.
The existing bridge is founded on timber piles which will not be modified in a way that affects their
capacity to support the bridge (e.g. embedment depth or bearing capacity). In addition, loads to the piles
will be less than for the previous railroad use.
Existing soils behind the end bents of the bridge consist of granular material originally used to support a
railroad. Loads for the trail use are less than the original railroad loading and will not compromise the
approach soils.
Rotting timber end walls, which support the approach embankment, will be replaced in kind. The existing
timbers have been in place for many decades and the new timbers are expected to meet the design life of
the interim trail improvements. Temporary excavation slopes will not exceed the slope of existing stable
slopes at the sides of the approach embankment.
Rotting timber wing walls, which support the approach embankment, will be replaced with precast
concrete blocks. The concrete blocks will be more stable than the existing condition and will meet the
design life of the interim trail improvements.
11241 Willows Road, NE, Suite 200, Redmond, WA 98052 Phone (425) 882-4446 Fax (425) 827-9577 otak.com
Technical Memorandum
To: Chris Erickson, King County Department of Natural Resources and Parks
From: Stephanie Modjeski, Wetland Scientist
Kevin O’Brien, Senior Ecologist
Copies: Bob Doherty, File
Date: 2/7/2018
Subject: May Creek and Ripley Lane Critical Areas Update
Project No.: 32499.E
Introduction
King County (County) Department of Natural Resources and Parks (DNRP) is proposing the May Creek and Ripley
Lane Trestle Rehabilitation Project. The project intends to repair and retrofit two trestle bridges located in the
City of Renton to the east of Lake Washington. The trestles are currently used as recreational pedestrian bridges
and are planned to become part of the multi-use Eastside Rail Corridor Regional (ERC) Trail in Renton. The
trestles are deteriorated and have defects and are in need of repairs to provide continuous use of the trail
system. In addition to repairs and rehabilitation of existing components of the trestle bridges, existing timber
railroad ties and steel railroad tracks will be removed, and new decking and railing will be installed.
The County has requested a site inspection to verify the presence of critical areas on the subject property. Otak,
Inc. Critical areas have been previously identified in the project area in the Ecosystem Resources Inventory—
Eastside Rail Corridor Regional Trail Master Plan Project prepared for King County by Parametrix, dated May 12,
2015. Otak biologists conducted a site visit on November 14, 2017 to verify the presence of critical areas as
documented in the 2015 ERC report. Critical areas reviewed include wetlands, streams, and habitat conservation
areas as regulated by Renton Municipal Code (RMC) Chapter 4-3-050 (Critical Areas Regulations).
The project is located in the City of Renton, King County, Washington. The May Creek trestle is located
approximately 300 feet north of N. 41st Street, west of Lake Washington Boulevard. The Ripley Lane trestle is
located west of and adjacent to Ripley Lane N., west of Interstate 405. The project is located in Sections 32 and
29, Township 24 North, Range 05 East of the Public Land Survey System.
ECOSYSTEM RESOURCES INVENTORY
EASTSIDE RAIL CORRIDOR REGIONAL TRAIL MASTER PLAN PROJECT
2015-05-12
DEPARTMENT OF COMMUNITY
AND ECONOMIC DEVELOPMENT
1
K:\project\32400\32499E\ProjectDocs\Permits\Shoreline Exemption\Shoreline Tracking Worksheet.docx Rev: 08/2016
SHORELINE TRACKING WORKSHEET
Planning Division
1055 South Grady Way, Renton, WA 98057
Phone: 425-430-7200 | www.rentonwa.gov
The City of Renton is required by the Washington State Department of Ecology to track and evaluate the effectiveness of
the Shoreline Master Program at achieving no net loss of shoreline ecological functions with respect to shoreline
projects. The City will use shoreline development tracking information to prepare a Shoreline Master Program report
every eight years to comply with the Shoreline Management Act requirements.
SHORELINE STABILIZATION
1. Is there currently a bulkhead on your site? Yes No; If yes, fill out table below.
If no, see “Site Conditions”, Section 2 below.
What Type of Materials is Your Bulkhead Made of? Linear Feet of Hard Materials:
Linear Feet of Soft Materials:
Examples of Types of Bulkheads: Hard (e.g. rocks, wood); Soft (e.g. sand, plants); Combination-soft
materials at the water with hard materials further inland, or a combination of hard and soft materials at
the water.
SITE CONDITIONS
2. List the size (in square feet) and type of all structures (1st floor only) on your property (e.g. 2,000 sq. ft.
house, 125 sq. ft. greenhouse).
The structures are two trestle bridges spanning 60 linear feet (LF) and 406 LF. The bridges are supported
by transverse bents. The May Creek trestle is supported by 5 timber pile bents and the Ripley Lane
trestle is supported by 27 timber pile bents. Each bent has 5 round piles per bent that vary in size from
12-14 inches in diameter. Area of combined bents is approximately 150 square feet.
3. List distance (in feet) from the water to the closest point of each structure. List each building separately
(e.g. shed, dock, carport).
The May Creek trestle is approximately 880 feet from the waters of Lake Washington.
The Ripley Lane trestle is approximately 200 feet from the water.
DEPARTMENTOFCOMMUNITYANDECONOMICDEVELOPMENT“RentonPLANNINGDIVISIONCERTIFICATEOFEXEMPTIONFROMSHORELINESUBSTANTIALDEVELOPMENTDATE:April13,2018PROJECTNUMBER:LUAJ8-000214,SMEPROJECTNAME:MayCreekandRipleyLaneNTrestlesProjectPROJECTMANAGER:ClarkClose,SeniorPlannerOWNER:KingCountyDNRPParksDivisionChrisErickson201SJacksonSt,#700Seattle,WA98104CONTACT:Otak,Inc.StephanieModjeski2731WestmoreAve,#300Everett,WA98201PROJECTLOCATION:EastsideRailCorridorRegional(ERC)TrailatMayCreekandRipleyLaneNPROJECTDESCRIPTION:TheapplicantisrequestingaShorelineExemptiontorepairandretrofittworecreationalpedestriantrestlebridgesthatareplannedtobecomepartofthemulti-useEastsideRailCorridorRegional(ERC)TrailintheKennydalearea.Theprojectsiteareaisapproximately19,880squarefeet.TheMayCreekandRipleyLanetrestlebridgesarelocatedintheResidential-8(R-8)andResidential-lO(R-10)zoningdistricts.TheMayCreektrestleislocatedapproximately300feetnorthofN41stSt(westofLakeWashingtonBlvdN)andtheRipleyLanetrestleislocatedadjacenttoRipleyLnN(westof1-405).TheRipleyLanetrestleislocatedapproximately220feetfromtheshorelineinLakeWashingtonReachB.TheMayCreektrestleislocatedaboveMayCreekandisapproximately840feetfromtheshorelineofLakeWashingtoninMayCreekReachA.Theshorelineusetable,RMC4-3-090E.1requirestheMayCreektrestleportionoftheworktoundergoanadministrativeconditionalusepermitwithintheUrbanConservancyOverlayDistrictforexpansionofexistingover-watertrails.TheshorelinedesignationfortheRipleyLanetrestleisShorelineResidential.Shorelineinthevicinityoftheprojectareaisborderedbysingleandmulti-familyresidences,privatedocks,andbulkheads.TheMayCreektrestlemeasuresroughly60feetlongand13feetwide,andtheRipleyLanetrestleisapproximately406feetlongand14feetwide.BothtrestleshavedefectsanddeteriorationintimberandsteelmembersandtrestlerepairsareneededtoprovidecontinuoususeoftheERCtrailsystem.Workunderthebridgeswouldbelimitedtopersonnelandhandequipmentforrepairofthepilesandrepairofpilecapbeams.Workattheendsofthebridgeswouldincluderemovalofexistingrottentimberwingwallsandendwalls,andgradingforaccesstothetopsofthebridges.Inaddition,existingtimberrailroadtiesandsteelrailroadtrackswouldberemovedandnewdeckingandrailingwouldbeinstalled.Thenewbridgewouldhaveasmallerfootprint,somorelightshouldbeabletopenetratebelow.BMPswouldbeusedwherelargerequipmentisusedanddisturbedareawouldbeseededand/orplantedasrequired.Debrisplatformswouldbeplacedunderthebridgestocatchfallingdebrisandlimitgrounddisturbance.ComponentsremovedfromthetrestlebridgerepairsPage1of3
1
Clark Close
From:Karen Walter <KWalter@muckleshoot.nsn.us>
Sent:Monday, July 09, 2018 11:52 AM
To:Clark Close
Subject:King County DNRP, PR18-000304 May Creek Trestle Project, LUA18-000421, Notice of
Application/ODNS
Clark,
We have reviewed the available materials for King County’s May Creek Trestle Project NOA/ODNS referenced
above. This project is a component of the larger Eastside Rail Corridor Project. We offer the following comments in the
interest of protecting and restoring the Tribe’s treaty-protected fisheries resources:
Project Scope
The project is proposing to expand the existing trail over May Creek through the repair and retrofit of the May Creek
trestles as part of the Eastside Rail Corridor project. As part of this work, some of the existing trestle piles will be repaired
including piles in Bent 3 which is located within the OHWM and 100-year floodplain of May Creek. Bents 2 and 4 also
appear to be within the OHWM and certainly the 100-year floodplain of May Creek (per the photo available on Map
Number R4 and likely within the 100-year floodplain per the photo available on Map Number R4 from the Eastside Rail
Corridor Regional Trail Master Plan’s Ecosystem Resources Inventory Report. The trestle piles all appear to be creosote
piles. Unfortunately, the project’s limited repair work misses an opportunity to provide significance environmental and
salmon habitat benefits by removing the creosote piles from the stream channel and associated floodplain. The
retrofitting of the existing bridge will maintain the current degraded environmental condition and may have further impacts
if the bridge piles experience scour, which will result in the addition of scour protection, generally in the form of rip-rap
which will further degrade salmon habitat. By keeping the pile bents as shown, there is also the potential for any wood
from upstream and adjacent streambank sources that threaten the bridge piles will be removed to ensure protection of the
bridge and trail. May Creek currently lacks wood and the lack of high quality wood was noted as a reason for continued
streambed downcutting and sediment deposition at the mouth (King County; May Creek Basin Action Plan 2001) which
has resulted in dredging of the May Creek delta to the detriment of juvenile Chinook and other salmon in Lake
Washington. These existing and continued impacts could be avoided if the bridge were replaced with a structure that
eliminates piling within the OWHM and floodplain areas of May Creek. If not now, when will this bridge structure be
replaced with a more-fish habitat friendly structure?
Project impacts
The new bridge will have a solid concrete deck surface (see Sheet S-8) which will created 840 square feet of solid surface
overwater coverage to May Creek. There is no assessment or consideration that the bridge will create shade conditions
such to affect juvenile salmon migration behaviors and potential increases in predation. This is an important consideration
because juvenile Chinook are documented in this stretch of May Creek per WDFW’s Salmonscape.
We appreciate the opportunity to review this proposal and look forward to the City/applicants’ written responses. We may
have further comments subsequently.
Thank you,
Karen Walter
Watersheds and Land Use Team Leader
Muckleshoot Indian Tribe Fisheries Division
Habitat Program
39015-A 172nd Ave SE
Auburn, WA 98092
253-876-3116
July 17, 2018
Karen Walter
Muckleshoot Indian Tribe Fisheries Division
Habitat Program
Phillip Starr Building
39015-A 172nd Ave SE
Auburn, WA 98092
SUBJECT: May Creek Trestle Project Comment Response Letter
LUA18-000421, ECF, SMC
Dear Ms. Walter:
Thank you for your initial comments and questions related to the May Creek Trestle Project, dated
July 9, 2018, wherein you’ve requested additional information regarding the subject project. More
specifically, as it pertains to when the May Creek bridge structure would be replaced with a more
fish habitat friendly structure. The City of Renton has placed the project on hold and has asked
the applicant to address your questions and comments. A full response to your questions will be
forthcoming.
Your letter has been included in the official project file and the reviewing official will consider your
concerns and requests as part of their review. You have been made a party of record and if you
have any additional questions please feel free to contact me at (425) 430-7289.
Sincerely,
Clark H. Close
Senior Planner
July 17, 2018
Stephanie Modjeski
Otak, Inc.
2731 Westmore Ave, Ste. #300
Everett, WA 98201
SUBJECT: "On Hold" Notice
May Creek Trestle Project, LUA18-000421, ECF, SMC
Dear Ms. Modjeski:
The Planning Division of the City of Renton accepted the above master application for review on
June 25, 2018. During our review, staff has determined that additional information is necessary in
order to proceed further.
The following information will need to be submitted before October 11, 2018 so that we may
continue the review of the above subject application:
1. On July 9, 2018, Karen Walter with the Muckleshoot Indian Tribe Fisheries Division
provided agency comments and questions regarding the subject application. These
comments and questions have been modified slightly to give you an opportunity to
comment on each question.
a. The proposed project’s limited repair work misses an opportunity to provide
significance environmental and salmon habitat benefits by removing the creosote
piles from the stream channel and associated floodplain. The retrofitting of the
existing bridge would maintain the current degraded environmental condition and
may have further impacts if the bridge piles experience scour, which would result
in the addition of scour protection, generally in the form of rip-rap which would
further degrade salmon habitat. By keeping the pile bents as shown, there is also
the potential for any wood from upstream and adjacent streambank sources that
threaten the bridge piles to be removed to ensure protection of the bridge and
trail. May Creek currently lacks wood and the lack of high quality wood was noted
as a reason for continued streambed downcutting and sediment deposition at the
RECEIVED
Clark Close 10/01/2018
PLANNING DIVISION
October 2, 2018
Stephanie Modjeski
Otak, Inc.
2731 Westmore Ave, Ste. #300
Everett, WA 98201
SUBJECT: "Off Hold" Notice
May Creek Trestle Project, LUA18-000421, ECF, SMC
Dear Ms. Modjeski,
Thank you for submitting the additional materials requested in the July 17, 2018 on hold letter
from the City. Your project has been taken off hold and the City will continue review of the May
Creek Trestle Rehabilitation Project.
The Shoreline Administrative Conditional Use Permit has been rescheduled for SEPA
Environmental Review on October 22, 2018. If you have any questions, please contact me at
(425) 430-7289.
Sincerely,
Clark H. Close
Senior Planner
cc: Chris Erickson / Owner
Karen Walter / Muckleshoot Indian Tribe Fisheries Division
1
Clark Close
From:Karen Walter <KWalter@muckleshoot.nsn.us>
Sent:Tuesday, October 09, 2018 6:04 PM
To:Clark Close
Cc:Kyle Wunderlin
Subject:RE: King County DNRP, PR18-000304 May Creek Trestle Project, LUA18-000421, Notice
of Application/ODNS
Attachments:Eastside Rail Corridor Regional Trail Master Plan, Determination of Significance and
Request for Comments on Scope of EIS; RE: Eastside Rail Corridor Draft Master Plan and
EIS
Clark,
Thank you for sending us the applicant’s responses to our comments. We have reviewed them and offer additional
comments as noted:
1. Trestle replacement
We understand that King County Parks did not budget to replace the trestle and repairing it would be
cheaper. The response does not adequately address the issues we raised in our comments to the Trail’s Master
Plan DS via an email dated July 17, 2015 (attached), which were:
“The planning and environmental review documents need to characterize all of the existing stream crossings for
fish passage and fish habitat processes to determine if any crossing that is blocking passage for adult and
juvenile salmon or adversely affecting fish habitat processes. To address this concern, we recommend that King
County complete a water-crossing passage survey that considers the upstream migration of adult and juvenile
salmons for all species, as well as, the adequacy of these structures to pass wood, water, and sediment through
them, without maintenance. Using the results of this information, then the identified water-crossing structures
should be replaced and restored as part of this regional trail construction and implementation. The survey work,
results of the survey work and the water-crossing replacement needs should be coordinated closely with us.”
To our knowledge this work has never been completed as we recommended and if it was, it was not shared with
us.
In our May 19, 2016 EIS comments to the trail, we specifically noted that:
“As we noted in our previous comments, one of the biggest issues for this project is how it will be crossing
streams; the nature of existing crossings (i.e. undersized culverts and bridges); opportunities to remove
obstructions and creosote pilings in water (see pages 2-5 and 4-12 showing creosote piles from existing trestles
in the water); and the potential to preclude future culvert repair or replacements projects up and downstream of
the trail. For example, WSDOT is currently designing road expansion work, including culvert replacements,
extensions, etc. along I-405 from Renton to Bellevue. This road project includes several existing fish passage
barriers on potential fish bearing streams that need to be made fish passable under the Federal injunction from
U.S. v. Washington proceedings (culvert case). See
http://www.wsdot.wa.gov/Projects/FishPassage/CourtInjunction.htm
The rail corridor as shown on page 2-9 in the Lakefront segment is downstream of I-405 and near the mouths of
several existing streams that could support salmon if they had access to them. This project cannot result in any
new or continued fish passage barriers. This may occur as a result of the trail location, the retention of existing
fish barriers where the trail crosses and the construction of fill and retaining walls. Now is the time for effective
planning that deals with these issues instead of later phases or segments that result in the continuation of fish
passage barriers without mitigation. Perpetuating these existing impacts by non [sic] touching poorly designed
and harmful structures will continue the cumulative effect of habitat degradation. From the information available
2
on pages 6-13 and 6-23, this issue has not been adequately assessed. There likely more than 7 streams (page
6-13) that have the potential to provide habitat for salmon if they were accessible.
A list of the known state-owned fish passage barrier culverts with potential habitat upstream near the trail corridor
can be found at:
http://www.wsdot.wa.gov/NR/rdonlyres/B056189E-6326-40F5-AD2D-
B76720B267F6/0/2015FishPassageReport.pdf
This revised planning effort should be coordinated closely with the Tribal Fisheries Division to ensure that we
concur with the approach, methods, and outcomes, and avoid permitting delays”.
We again asked for a larger planning effort to remove and replace crossings, including the creosote trestle. These
concerns have largely been ignored to date.
The responses rely on in part to the Preliminary Design Report (Otak 2017). We don’t have a copy of this report
and we should have received copy for our review since we have expressed concerns with this project and its
crossings. Please have the applicant send us this report so we may review it accordingly.
2. Creosote and Water Quality
Creosote-infused wood can leach PAH’s and cause adverse impacts to salmon. If this wasn’t the case, then
applicants wouldn’t get mitigation credit for removing creosote wood piles, etc. Please see the attached paper
from WDFW regarding treated wood and impacts to salmon
(https://wdfw.wa.gov/publications/00053/wdfw00053.pdf).
3. Scour concerns- Please have the applicant send us the Otak November 2017 Preliminary Design Report.
4. Woody debris concerns- The applicant’s responses regarding the trestle’s ability to interfere with wood transport
is short-sighted. The I-405 crossing of May Creek will be improved and reduce hydraulic restrictions. We are
unaware of existing structures that would interfere with the transport of wood upstream of the trestle. If the
stream gauge weir is a problem, then it should be modified so that it doesn’t interfere with wood transport. Also,
given the forested conditions upstream of the trestle and the City’s intent to keep it that way with the May Creek
trail, then it is logical that trees will mature and recruit to May Creek over time. The enhancements to the trestle
will extend its design life, thus increasing the chances that trees will end up in the stream and need to be
removed, in part because of the trestle’s in-water piers that restrict flows and wood transport.
5. Shading impacts
The applicant’s responses ignored the impacts of having a solid structure at this location will create a sharp edge
from shading which will likely affect juvenile salmon behaviors and may increase salmon predator habitat. This
issue has been studied and is regularly considered for new, replaced and repaired structures when projects
undergo environmental review and permitting. WDFW has published two documents on the topic:
https://wdfw.wa.gov/publications/00052/wdfw00052.pdf
https://wdfw.wa.gov/publications/00995/wdfw00995.pdf
In addition, shading impacts to juvenile salmon are noted in the WRIA 8 Synthesis report (see
http://www.govlink.org/watersheds/8/pdf/LWGI_SalmonSyn123108.pdf
The solid trail structure proposed does not address the concern nor provide any mitigation.
We appreciate the opportunity to continue coordination with the City of Renton to address our concerns. Please let me
know if you have any questions.
Thank you,
Karen Walter
Watersheds and Land Use Team Leader
Muckleshoot Indian Tribe Fisheries Division
Habitat Program
3
39015-A 172nd Ave SE
Auburn, WA 98092
253-876-3116
From: Clark Close [mailto:CClose@Rentonwa.gov]
Sent: Tuesday, October 02, 2018 9:59 AM
To: Karen Walter
Cc: Kyle Wunderlin
Subject: FW: King County DNRP, PR18-000304 May Creek Trestle Project, LUA18-000421, Notice of Application/ODNS
Karen,
Please find attached off hold letter and response letter from KC Parks. Let me know if you have any further questions or
comments by October 9, 2018.
Thanks,
Clark H. Close
Senior Planner
City of Renton
425-430-7289
1
Clark Close
From:Karen Walter <KWalter@muckleshoot.nsn.us>
Sent:Friday, July 17, 2015 11:48 AM
To:Brown, Kevin
Cc:erctrail@kingcounty.gov
Subject:Eastside Rail Corridor Regional Trail Master Plan, Determination of Significance and
Request for Comments on Scope of EIS
Mr. Brown,
We have reviewed the Scoping Notice for the proposed Eastside Rail Corridor Regional trail Master Plan. As you know,
this trail is proposed for 42 miles along the former “Lake Washington Belt” rail line that stretches from Renton to
Snohomish County. Both the Master Plan and the Draft EIS should address the following comments that we offer in the
interest of protecting and restoring the Tribe’s treaty-protected fisheries resources:
Stream identification and classification
The planning and environmental review documents need to identify all potential streams in the entire corridor and classify
them using all available known fish use data. The Ecosystems Resources Inventory Report (May 2015) appears to be a
good start; however, from our knowledge of the project area, there appears to be streams missing from this
inventory. For streams where there is no known fish use data, the streams should be classified using the physical criteria
from WAC 222-16-031 and Forest Practices Board Manual 13 which considers natural barriers and potential fish habitat.
Stream crossings
With the information gathered for all of the project area streams, the planning and environmental review documents need
to characterize all of the existing stream crossings for fish passage and fish habitat processes to determine if any crossing
that is blocking passage for adult and juvenile salmon or adversely affecting fish habitat processes. To address this
concern, we recommend that King County complete a water-crossing passage survey that considers the upstream
migration of adult and juvenile salmons for all species, as well as, the adequacy of these structures to pass wood, water,
and sediment through them, without maintenance. Using the results of this information, then the identified water-crossing
structures should be replaced and restored as part of this regional trail construction and implementation. The survey
work, results of the survey work and the water-crossing replacement needs should be coordinated closely with us.
Riparian, Wetland and Lakeshore vegetation impacts and mitigation needs
The trail construction and operations will likely require the removal of vegetation and/or the permanent preclusion of trees
that would other provide riparian functions to streams, wetlands, and lakes in the project area. The trail plan and DEIS
need to identify these potential impacts and describe mitigation measures to address impacts to riparian functions. One
issue we see routinely with these kinds of projects is the idea that groundcover and shrubs are somehow functional
equivalent to trees when they are not. If the trail corridor results in tree removal and the permanent preclusion of trees
because of the trail and utility features, then these impacts must be fully mitigated. This discussion and analysis should
also include future hazard trees that will likely need to be removed over time.
Trail ditch/stream maintenance
As we have seen with other regional trails, there are several areas where streams are conveyed through managed ditch
systems which require regular maintenance. These areas should be identified as part of the stream classification process
identified above and where there will be regular maintenance the plan and DEIS should discuss these actions and how
they will be fully mitigated.
All of these issues need to be addressed in the planning documents and the DEIS. Where there are actions described as
occurring in phases and later dates, a process needs to be identified and set up to ensure there is early and frequent
coordination with us to ensure early resolution and avoiding permitting delays.
We appreciate the opportunity to review this scoping notice and look forward to reviewing documents that address these
issues. If you have any questions, please contact me.
Thank you,
Karen Walter
2
Watersheds and Land Use Team Leader
Muckleshoot Indian Tribe Fisheries Division
Habitat Program
39015 172nd Ave SE
Auburn, WA 98092
253-876-3116
1
Clark Close
From:Karen Walter <KWalter@muckleshoot.nsn.us>
Sent:Thursday, May 19, 2016 1:47 PM
To:'Jacobs, Erica'
Cc:'Peterson, Bob'; 'lmurphy@muckleshoot.nsn.us'
Subject:RE: Eastside Rail Corridor Draft Master Plan and EIS
Erica,
Thank you for sending us directly a copy of the Eastside Rail Corridor Draft Master Plan and EIS. In addition to our
previous scoping comments (dated July 17, 2015), we offer the following comments in the interest of protecting and
restoring the Tribe’s treaty-protected fisheries resources.
1. This project is within the Muckleshoot Tribe’s Usual and Accustomed Fishing Area. The salmon populations in
WRIA 8 are in dire straits and fishing opportunities in this Basin are significantly reduced for Muckleshoot Tribal
members. There is no discussion about potential impacts to salmon that can affect fishing opportunities in the
Master Plan or DEIS. Further, this trail is a new trail that will connect to existing and proposed trails elsewhere in
WRIA 8 and beyond adding to cumulative impacts to streams and wetlands by the location and management of
these trails.
The Eastside Rail Corridor Regional Trail and all of the existing and planned trails (i.e. Lake to Sound; Cedar
River; SR 520 trail; Sammamish River trail, etc) anticipated to connect to it need to address the primary fact that
the location and existing nature of the rail corridors proposed for trails are often located within streams and
wetlands and/or their buffers creating adverse conditions for habitat processes. The railroads filled wetland
areas, re-routed streams into ditches and channelized streams, dredged these areas; removed vegetation, and
crossed streams using undersized culverts and bridges. These existing conditions should be rectified to the
fullest extent possible as part of these trail projects. Just as trail corridors and connections are important for
people to use non-motorized means to travel, streams are corridors for salmon that need both quality and quantity
habitat throughout to ensure their productivity, distribution, and diversity. From our review of the County’s
responses and our experiences with other regional trails in the area, these issues are not fully considered. For
example, the DEIS states: “Minimal impacts are expected for the May Creek, Coal Creek, Stream SR6, and
Kelsey Creek aquatic habitats because all work would take place on the existing trestles that cross over
them”. This approach will not lead to the environmental improvements needed for salmon and their
habitats. Once the trails are in and actively used, it is very difficult and nearly impossible to make changes
needed to improve salmon habitat conditions. The time to address these concerns is now.
2. As we noted in our previous comments, one of the biggest issues for this project is how it will be crossing
streams; the nature of existing crossings (i.e. undersized culverts and bridges); opportunities to remove
obstructions and creosote pilings in water (see pages 2-5 and 4-12 showing creosote piles from existing trestles
in the water); and the potential to preclude future culvert repair or replacements projects up and downstream of
the trail. For example, WSDOT is currently designing road expansion work, including culvert replacements,
extensions, etc. along I-405 from Renton to Bellevue. This road project includes several existing fish passage
barriers on potential fish bearing streams that need to be made fish passable under the Federal injunction from
U.S. v. Washington proceedings (culvert case). See
http://www.wsdot.wa.gov/Projects/FishPassage/CourtInjunction.htm
The rail corridor as shown on page 2-9 in the Lakefront segment is downstream of I-405 and near the mouths of
several existing streams that could support salmon if they had access to them. This project cannot result in any
new or continued fish passage barriers. This may occur as a result of the trail location, the retention of existing
fish barriers where the trail crosses and the construction of fill and retaining walls. Now is the time for effective
planning that deals with these issues instead of later phases or segments that result in the continuation of fish
passage barriers without mitigation. Perpetuating these existing impacts by non touching poorly designed and
harmful structures will continue the cumulative effect of habitat degradation. From the information available on
pages 6-13 and 6-23, this issue has not been adequately assessed. There likely more than 7 streams (page 6-
13) that have the potential to provide habitat for salmon if they were accessible.
2
A list of the known state-owned fish passage barrier culverts with potential habitat upstream near the trail corridor
can be found at:
http://www.wsdot.wa.gov/NR/rdonlyres/B056189E-6326-40F5-AD2D-
B76720B267F6/0/2015FishPassageReport.pdf
This revised planning effort should be coordinated closely with the Tribal Fisheries Division to ensure that we
concur with the approach, methods, and outcomes, and avoid permitting delays.
3. Another issue is the location of the proposed trail segments to streams and wetlands and how these sensitive
areas will be avoided and impacts minimized and fully mitigated where impacts are unavoidable. The existing
railbed corridor is often located adjacent to streams and wetlands in very close proximity limiting channel
migration, wood recruitment, shading, etc. The adjacent buffer areas are typically full of invasive plant species
that reduce stream and wetland functions and require mowing to maintain. This regional trail presents an
opportunity to reduce some of these impacts and provide mitigation in places where the trail will not be relocated
as needed to restore stream, wetland and riparian functions. The project needs to locate all existing mitigation
sites near the corridor, as well as, any proposed restoration sites. These mitigation and restoration areas should
be avoided by the project so that the mitigation sites are protected and the restoration sites are available for those
future actions. An example is the substantial mitigation that WSDOT has done in Yarrow Creek as part of the SR
520 Eastside HOV project. A portion of this project overlaps with the Wilburton segment of the trail. The trail
should avoid the mitigation areas from the highway project and provide the opportunity for further stream
restoration to provide additional ecological lift.
4. Another important consideration is the extent and location of the rail corridor where the trail will be located with
either option. While the trail right-of way is only 100 feet wide, the areas where the trail corridor parallel streams
for substantial lengths has reduced riparian functions over large areas. For example, the Valley Segment (North
Kirkland and Woodinville) notes that 56 percent of the mainline corridor is adjacent to a wetland or stream and 43
percent of the Spur is adjacent to a wetland or stream. The Master plan is contemplating limitations on restoring
native trees and shrubs as described on page 3-22. The location and management of the corridor for the trail and
other potential uses (rail) means that these areas will not be restored to provide full riparian functions and should
be mitigated to offset impacts to salmon habitat so that there is a net gain from this project and not continued
degradation.
5. Artificial lighting also needs to be carefully planned and located to not add further impacts to juvenile salmon
seeking to outmigrate where lighting can cause delays and increased predation risk. The Lakefront Segment is
an example where the lower Cedar River and adjacent Lake Washington shoreline already creates lighting
conditions that adversely affect salmon (see Tabor et al. 2004: The Effect of Light Intensity on Sockeye Fry
Migratory Behavior and Predation by Cottids in the Cedar River Washington). These potential impacts are not
considered in the master plan on page 3-23.
In summary, this project needs to provide for a net gain in salmon habitat and functions and access to these areas. This
regional project needs to set the example by providing substantial improvements to salmon habitat not merely providing
mitigation for project impacts.
We appreciate the opportunity to continue coordination and provide input to King County on this project. Please let me
know if you have any questions.
Thank you,
Karen Walter
Watersheds and Land Use Team Leader
Muckleshoot Indian Tribe Fisheries Division
Habitat Program
39015 172nd Ave SE
Auburn, WA 98092
253-876-3116
From: Jacobs, Erica [mailto:Erica.Jacobs@kingcounty.gov]
Sent: Wednesday, April 27, 2016 12:30 PM
To: Karen Walter; lmurphy@muckleshoot.nsn.us
Cc: Peterson, Bob
Subject: Eastside Rail Corridor Draft Master Plan and EIS
3
Good afternoon Karen and Laura,
I spoke with Bob Peterson and learned that you had not received a copy of our Draft Master Plan and EIS for the Eastside
Rail Corridor Regional Trail. I’m sorry to hear they didn’t make it to your attention, our courier receipt, attached,
indicates delivery was made to the Muckleshoot Tribal Offices on 2/26 but I apologize if our transmittal did not clearly
address the documents to your attention as intended. Today I am sending two hard copies by courier with one
addressed to each of you, under the attached cover letter. As noted in the letter, King County values your comments and
would like to extend the opportunity for you to provide comments to May 25th. Bob and I would also be happy to meet
with you if that would be helpful.
Sincerely,
Erica Jacobs
Project Manager, Eastside Rail Corridor Regional Trail Project
King County Parks
Department of Natural Resources and Parks
201 South Jackson Street, M.S. KSC-NR-0700
Seattle, WA 98104
e-mail: erica.jacobs@kingcounty.gov
phone: 206.477.5539
October 16, 2018
Karen Walter
Muckleshoot Indian Tribe Fisheries Division
Habitat Program
Phillip Starr Building
39015-A 172nd Ave SE
Auburn, WA 98092
SUBJECT: May Creek Trestle Project Comment Response Letter (2)
LUA18-000421, ECF, SMC
Dear Ms. Walter:
Thank you for your additional comments and questions related to the May Creek Trestle Project,
dated October 9, 2018, wherein you’ve requested additional information regarding the subject
project. The City of Renton has asked the applicant to address your questions and comments and
a full response to your questions will be forthcoming. Please note that this land use application is
for a Shoreline Administrative Conditional Use Permit to convert a former railway to a multi-use
regional trail and recreation trails are a supported use under the City’s Shoreline Master Program
provided that the use does not degrade the ecological functions or natural character of the
shoreline area.
Your letter has been included in the official project file and the reviewing official will consider your
concerns and requests as part of their review. If you have any additional questions please feel free
to contact me at (425) 430-7289.
Sincerely,
Clark H. Close
Senior Planner
2731 Wetmore Avenue, Suite 402, Everett, WA 98201 Phone (425) 493-5221 Fax (425) 374-5152 otak.com
Construction Mitigation Description
Construction is proposed to begin in July 2018 and end in October 2018. Construction will occur during daylight
hours, Monday through Friday. Transportation and access to the project site will be from North 41st Street and
Lake Washington Boulevard North. No fill or excavation will take place below the ordinary high water mark of
May Creek. All proposed repair and retrofit work will occur to existing trestle structures and no change in the
bridge footprint will occur. Cleared areas will be limited to the stabilized construction entrance, access road and
wheel wash area. High visibility fencing will be installed to protect existing vegetation. Temporary erosion and
sediment control measures (TESC) and appropriate construction best management practices (BMPs) such as silt
fencing, will be used during construction to minimize erosion. Potential stormwater runoff from the construction
activity will be intercepted by installed erosion control methods.
2731 Wetmore Avenue, Suite 402, Everett, WA 98201 Phone (425) 493-5221 Fax (425) 374-5152 otak.com
Conditional Use Permit Justification
Appropriate Location: The proposed project intends to repair and retrofit an existing trestle bridge, that has
deteriorated and is need of repairs to allow for continued use of the bridge as a pedestrian trail and for the
future use as a multi-use trail as part of the ERC trail system.
Effect on adjacent properties: The project will occur within the same footprint of the existing bridge and will
have no effect on adjacent properties.
Compatibility: The proposed project is compatible with the existing use of the trestles as a trail system.
Parking: No parking will be created or removed as part of this project. Parking does not exist currently, and
repair of the trestle will not create an increased need for parking in the project vicinity.
Traffic: The project is not anticipated to increase new traffic trips for AM and PM times. There will be no change
in roadways or access to the trail system. No long-term impacts to traffic are anticipated as a result of this
project. Temporary changes in traffic may occur along Lake Washington Boulevard N and N 41st Street during
project construction. The repaired trestle will allow for long-term pedestrian use of the trail. A 6-foot tall chain-
link fence will be installed on each side of the walkway as a safety measure.
Noise, Light, and Glare: There will be no noise, light, or glare impacts as a result of the project.
Landscaping: No trees or woody shrubs will be removed for this project and adjacent vegetated areas will be
protected with high visibility fencing during construction. No landscaping is proposed for this project. Two,
approximately 200-square foot areas on the north east and south east ends of the bridge will be cleared for an
access road/wheel wash area. These areas will be re-seeded with native vegetation after repairs are completed.
D
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NOTE: TH IS AREA IS SHOWN AS BEINGPROTECTED FROM THE 1-PERC EN T-ANNUAL-CHANCE OR GREATER FLOOD H AZARD BY ALEVEE SYSTEM THAT HAS BEEN PROVISIONALLYACCREDITED. OVERTOPPING OR FAILURE OFANY LEVEE SYSTEM IS POSSIBLE. FORADDITIONAL INFORMATION SEETHE"PROVISIONALLY ACCREDITED LEVEE NOTE" INNOTES TO USERS. AVENUERTTUUVSNNM M
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122° 13' 07.5"47° 31' 52.5"
122° 11' 15"
ZONE AE
31
RENTONMUNICIPALAIRPORTPROFILE BASELINE
N RIVERSIDE DRIVE
5262000mN .
ZONE X
561000mE
7
560000mE
7
559000mE
JOIN S PANEL 0977
JOIN S PANEL 0675
JOINS PANEL 0668JOINS PANEL 06635264000mN .
5263000mN .
7
47° 30' 00"
122° 11' 15"47° 30' 00"
122° 13' 07.5"
47° 31' 52.5"
COMMUNITY NUMBER PANEL SUFFIX
CONTAINS:
(SEE MAP INDEX FOR FIRM PANEL LAYOUT)
Federal Emergency Management Agency
FLOOD INSURANCE RATE MAPFIRM
MAP REPOSITORIESRefer to Map Repositories list on Map Index
EFFECTIVE DATE OF COUNTYWIDEFLOOD INSURANCE RATE MAPSeptember 29, 1989
EFFECTIVE DATE(S) OF REVISION(S) TO THIS PANELMay 16, 1995 - to update map format.(Date of Revision) - to change Base Flood Elevations, to update corporate limits, to add roads and road names, to update the effects of wave action, to change Special Flood Hazard Areas, to change zone designations and to incorporate previously issued Letters of Map Revision.
For community map revision history prior to countywide mapping, refer to the CommunityMap History table located in the Flood Insurance Study report for this jurisdiction.
To determine if flood insurance is available in this community, contact your insurance agentor call the National Flood Insurance Program at 1-800-638-6620.
Notice to User: The Map Number shown belowshould be used when placing map orders; theCommunity Number shown above should beused on insurance applications for the subject community.
MAP REVISED
MAP NUMBER53033C0664G
KING COUNTY,WASHINGTONAND INCORPORATED AREAS
KING COUNTY 530071 0664 G
MERCER ISLAND, CITY OF 530083 0664 G
NEWCASTLE, CITY OF 530134 0664 G
RENTON, CITY OF 530088 0664 G
NFIP
NATIONAL FLOOD INSURANCE PROGRAMPANEL 0664G
PANEL 664 OF 1700
250 10000FEET
150 3000METERS
MAP SCALE 1" = 500'500
150
NOTES TO USERS
This map is for use in ad ministering the Na tio nal Flood Insuran ce Pro gram. It doe snot necessarily identify all areas subje ct to floodin g, pa rticu larly fro m local drainagesources of small size. The community map repository should be consulted forpossible updated or addition al flood hazard in formation .
To obtain more detailed in formation in are as where Base Flood Elevations (BFEs)and/or floodways have been determined, users are encouraged to consult the FloodProfiles and Floodway Data and/or Su mmary of Stillw ate r Eleva tio ns tables con tainedwithin the Flood Insurance Study (FIS) Repo rt that a cco mp anie s th is FIRM. Usersshould be aware that BFEs shown on the FIRM represent rounde d w hole -footelevations. These BFEs are intende d for floo d in surance ra ting p urposes o nly a ndshould not be used as the sole source of flo od elevation in formation . Acco rd ingly,flood elevation data presente d in the FIS Re port sh ould b e utilize d in conjunction withthe FIRM for purposes of constru ctio n a nd/or floo dpla in ma nage me nt.
Coastal Base Flood Elevations shown on this map apply only landward of 0.0’North American Vertical Datum of 19 88 (NAVD 8 8). Users of th is FIRM sho uld b eaware that coastal flood eleva tio ns are also provided in th e Summary of Stillwa te rElevations table in the Flood Insuran ce Stud y R eport fo r this jurisdiction . Eleva tio nsshown in the Summary of Stillw ate r Ele va tions tab le should be used for constru ctio nand/or floodplain manageme nt p urposes whe n they are higher than the elevatio nsshown on this FIRM.
Boundaries of the floodways were computed at cross sections and interpolatedbetween cross sections. The flo odways were b ased o n hydra ulic co nsidera tio ns withregard to requirements of th e National Flo od In su rance Program. Flood way widthsand other pertinent floodwa y data a re provided in the Flood Insura nce Study Re portfor this jurisdiction.
Certain areas not in Special Flood Hazard Are as may b e pro tected by flood controlstructures. Refer to Section 2.4 "Flood Protection Measures" of the Flood InsuranceStudy Report for information on flood con trol structure s for this jurisd iction.
Provisionally Accredited Le vee Notes to Users: Check with yo ur localcommunity to obtain more information, such as th e estimated le vel of protectionprovided (which may exceed the 1-pe rcen t-an nual-ch ance level) an d Emerge ncyAction Plan, on the levee syste m(s) shown as providing protection fo r area s onthis panel. To maintain accreditation , the levee ow ner or co mmun ity is requiredto submit the data and documentation ne cessary to comply with Section 6 5.1 0 ofthe NFIP regulations by Nove mb er 0 1, 20 18. If the commu nity o r own er doesnot provide the necessary data a nd docu me nta tio n or if the da ta anddocumentation provided indica te the levee syste m d oes not comply withSection 65.10 requireme nts, FEMA will revise the flood hazard and riskinformation for this area to reflect de-accredita tio n of th e levee system. Tomitigate flood risk in residua l risk areas, prope rty own ers and residents areencouraged to consider flood in surance an d floodp roofing or o the r prote ctivemeasures. For more informa tion on flood insura nce, interested p arties shou ldvisit the FEMA Website a t http://www.fe ma .go v/na tio nal-floo d-insuran ce -program.
The projection used in the preparation of this map was Universal TransverseMercator (UTM) zone 10. The horizontal datum was NAD 83, GRS 1980spheroid. Differences in d atu m, sp heroid , proje ctio n o r UTM zone s used in theproduction of FIRMs for adjace nt jurisd ictions may result in slig ht positio naldifferences in map features across ju risdiction b ound aries. These d iffere nces do n otaffect the accuracy of this FIRM.
Flood elevations on this ma p are referenced to th e No rth American Ve rtica l Da tum o f1988. These flood elevations mu st be compared to structure and groun d ele vationsreferenced to the same vertical datum. For information regarding conversionbetween the National Geodetic Vertica l Datum of 192 9 and the North America nVertical Datum of 1988, visit the Na tional G eodetic Survey we bsite athttp://www.ngs.noaa.gov or contact the National Geodetic Survey at the followingaddress:
NGS Information ServicesNOAA, N/NGS12National Geodetic SurveySSMC-3, #92021315 East-West HighwaySilver Spring, Maryland 20910 -3282(301) 713-3242
To obtain current elevation, d escription, and/or loca tio n information for bench marksshown on this map, please co ntact th e Information Services Bra nch of the Nationa lGeodetic Survey at (301) 713- 3242, or visit its website at http://www.ngs.noaa.gov.
Base Map information shown on the FIRM was derived from multip lesources. Base map files we re p ro vided in digital fo rma t by King County G IS, WADNR, WSDOT, and Pierce Co unty G IS. This information was compiled at scales of1:12,000 to 24,000 during the time period of 199 4-2012 .
The profile baselines depicted on this map represent the hydraulic modeling baselines that match the flood profiles in the FIS re port. As a result of imp ro ved to pograph ic data, the profile baseline, in some cases, may deviate significantly from the channel centerline or appear outside the SFHA.
Based on updated topogra phic in formation , this map refle cts more detailed an dup-to-date stream channel configurations and floodplain delineations thanthose shown on the previo us FIRM for this jurisdiction . As a re su lt, th e FloodProfiles and Floodway Data table s for multiple stre ams in the FloodInsurance Study Report (w hich co nta ins authoritative hydraulic da ta) may reflectstream channel distances th at differ fro m wha t is shown on the ma p. Also, the road to floodplain relationship s fo r unrevise d stre ams ma y differ fro m what isshown on previous maps.
Corporate limits shown on this map are based on the best data available at the timeof publication. Because cha nges d ue to ann exations or d e-anne xa tions may haveoccurred after this map w as p ublish ed, map use rs should contact app ro priatecommunity officials to verify current corpo rate limit loca tio ns.
Please refer to the separa tely printed Map Index for an overview map of thecounty showing the layou t of ma p pa nels; community map repo sito ry addresses;and a Listing of Communities tab le co nta inin g Na tio nal Flood In su ra nce Prog ra mdates for each community as w ell as a listin g of the pa nels o n which each co mmun ityis located.
For information on availab le p roducts associa ted with this FIRM visit th e MapService Center (MSC) website at http://msc.fema.gov. Available products mayinclude previously issue d Letters of Map Ch ange, a Flo od Insurance Stud y Report,and/or digital versions of this map. Man y of these prod ucts can be o rdered orobtained directly from the MSC we bsite.
If you have questions about this map, how to order products, or the NationalFlood Insurance Program in gene ral, ple ase call the FEMA Map InformationeXchange (FMIX) at 1-877-FEMA-MAP (1-877-336-2627) or visit the FEMAwebsite at http://www.fema.gov/business/nfip.
Zone D boundary
Floodway boundary
1% Annual Chance Floodplain Boundary
0.2% Annual Chance Floodplain Boundary
*Referenced to the North American Vertical Datum of 1988
D
!!!!!!!!!!!!!!LEGEND
SPECIAL FLOOD HAZARD AREAS (SFHAs) SUBJECT TOINUNDATION BY THE 1% ANNUAL CHANCE FLOOD
ZONE A
ZONE AE
ZONE AH
ZONE AO
ZONE AR
ZONE A99
ZONE V
ZONE VE
ZONE X
FLOODWAY AREAS IN ZONE AE
OTHER FLOOD AREAS
OTHER AREAS
ZONE X
ZONE D
The 1% annual chance flood (100-year flood), also known as the base flood, is the flood that hasa 1% chance of being equaled or exceeded in any given year. The Special Flood Hazard Area isthe area subject to flooding by the 1% annual chance flood. Areas of Special Flood Hazardinclude Zones A, AE, AH, AO, AR, A99, V, and VE. The Base Flood Elevation is the water-surfaceelevation of the 1% annual chance flood.
No Base Flood Elevations determined.
Base Flood Elevations determined.
Flood depths of 1 to 3 feet (usually areas of ponding); Base Flood Elevationsdetermined.
Flood depths of 1 to 3 feet (usually sheet flow on sloping terrain); averagedepths determined. For areas of alluvial fan flooding, velocities also determined.
Special Flood Hazard Areas formerly protected from the 1% annual chanceflood by a flood control system that was subsequently decertified. ZoneAR indicates that the former flood control system is being restored to provideprotection from the 1% annual chance or greater flood.Area to be protected from 1% annual chance flood by a Federal floodprotection system under construction; no Base Flood Elevations determined.
Coastal flood zone with velocity hazard (wave action); no Base Flood Elevationsdetermined.
Coastal flood zone with velocity hazard (wave action); Base Flood Elevationsdetermined.
The floodway is the channel of a stream plus any adjacent floodplain areas that must be kept free ofencroachment so that the 1% annual chance flood can be carried without substantial increases inflood heights.
Areas of 0.2% annual chance flood; areas of 1% annual chance flood withaverage depths of less than 1 foot or with drainage areas less than 1 squaremile; and areas protected by levees from 1% annual chance flood.
Areas determined to be outside the 0.2% annual chance floodplain.
Areas in which flood hazards are undetermined, but possible.
CBRS areas and OPAs are normally located within or adjacent to Special Flood Hazard Areas.
CBRS and OPA boundary
Boundary dividing Special Flood Hazard Area Zones and boundary dividing Special Flood Hazard Areas of different Base Flood Elevations, flood depths, or flood velocities.
Base Flood Elevation value where uniform within zone; elevation infeet*
Cross section line
Transect line
Geographic coordinates referenced to the North American Datum of1983 (NAD 83) Western Hemisphere
1000-meter Universal Transverse Mercator grid values, zone 104989000m N
Bench mark (see explanation in Notes to Users section of this FIRMpanel)
River Mile
Base Flood Elevation line and value; elevation in feet*
COASTAL BARRIER RESOURCES SYSTEM (CBRS) AREAS
OTHERWISE PROTECTED AREAS (OPAs)
513
(EL 987)
45° 02’ 08”, 93° 02’ 12”
DX5510
M1.5
A A
23 23