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HomeMy WebLinkAboutSWP273205(7)Y CITY OF RENTON u �y�� r, ♦ ' �.� . Kathy Keolker, Mayor November 9, 2006 Ms. Allison Ray Washington State Department of Transportation 600 1081h Avenue Northeast, Suite 405 Bellevue, Washington 98004 PlanningBuilding/PublicWorks Department Gregg Zimmerman P.E., Administrator SUBJECT: I-405 RENTON NICKEL IMPROVEMENT PROJECT, I-5 TO SR 169 ENVIRONMENTAL ASSESSMENT (OCTOBER 2006) COMMENTS Dear Ms. Ray: Thank you for the continued collaborative effort between WSDOT and the City on the planning and design of improvements to the I-405 corridor. The City of Renton submits the following comments for consideration in regards to the I-405 Renton Nickel Improvement Project, 1-5 to SR 169 Environmental Assessment. CHAPTER 1— SUMMARY On page 1-2, paragraph 5, and page 1-3, "Noise and Vibration", revise this section based on the following comments pertaining to Appendix Q. CHAPTER 4 — DESCRIPTION OF THE PROJECT On page 4-9, Exhibit 4-8 shows an open channel along Main Ave S/Benson Rd S from S 4th Street to the Sam's Club property. This does not seem accurate. On page 4-11, the text states that "the project will not affect the I-405 bridges over the Green River, Lind Avenue, or the Cedar River." 1-405 does not go over Lind Ave. On both pages 4-11 and 4-14, is the Lind Avenue Bridge impacted by the retaining wall on the south side of I-405 underneath Lind Avenue? The City has a water main attached underneath the Lind Avenue structure and wants to be sure this water main is not affected. On page 4-17 the City notes, "The new I-405 southbound and northbound bridges over Springbrook Creek and Oakesdale Avenue will also receive CSS treatments." 1055 South Grady Way - Renton, Washington 98055 This paper contains 50 % recycled material, 30 % post consumer RENTON AHEAD OF THE CURVE I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 9, 2006 Page 2 of 8 CHAPTER 5.1— NOISE AND VIBRATION On page 5-19, the City disagrees with the determination that only one noise wall is both reasonable and feasible. Please see the following comments pertaining to Appendix Q. Appendix Q — Noise and Vibration Discipline Report The City disagrees with the determination that Noise Barrier West 2 is not feasible or reasonable. This conceptual noise wall runs along the west side of I-405 between the Cedar Avenue overpass and Renton City Hall. Exhibit 12 states that a near source barrier for an elevated roadway is "very effective". The text on page 23 indicates even a short wall can be effective with a near source barrier and an elevated roadway. Such would be the case with Noise Barrier West 2. On page 31, first paragraph, the text states that the effectiveness of noise barriers was evaluated at the outermost boundary of the right-of-way. Certainly for Noise Barrier West 2, evaluating the noise barrier at the outermost boundary of the right-of-way would be erroneous, as the right-of-way line appears to be located at the base of the slope immediately adjacent to Main Ave S. On page 32, the DR states that the study area for the noise analysis extends approximately 1,000 feet from the project. The modeled noise receptors for Noise Barrier West 2 should have included the Spencer Court Apartments (334 Wells Ave S), a 72-unit, affordable housing apartment complex located less than 400 feet from the I-405 Renton Nickel project. The City agrees that Main Ave S contributes to noise. However, Main Ave S noise is not constant 24 hours a day like the I-405 corridor, and therefore the noise analysis should factor the I-405 noise when Main Ave S is quiet. On page 56, Noise Barrier West 2 is certainly feasible when Main Ave S has reduced traffic, such as during the late -night hours (12 a.m. — 5 a.m.). WSDOT policy elsewhere, such as the I-5 express lanes, is to reduce noise in these hours. The planning level costs used to evaluate noise barriers (Exhibits 30-33, 35) all use $32.31 per square foot of barrier, regardless of the location or situation. The exception is that the planning level cost for Noise Barrier East 3 was then almost doubled to account for existing conditions. No planning level cost was provided for Noise Barrier West 2, however the planning level cost should be significantly less than $32.31 per square foot because a retaining wall is already being constructed in this area, essentially already completing the substructure foundations/footings. To add an additional 8 feet in height above the jersey -type safety barrier above the retaining wall for approximately 1,300 linear feet would likely be less than $200,000. H:\File Sys\TRP - Transportation Planning & Programming\TRP-10 -Transportation Planning Projects\WSDOT I-405\Nickel Project\EA Discipline Reports\1 405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 9, 2006 Page 3 of 8 Therefore, the City's opinion is that the EA should be amended such that Noise Barrier West 2 is determined to be feasible and reasonable. The EA should then include additional analysis to determine that Noise Barrier West 2 will not, by way of deflection, introduce additional noise to the Renton Hill neighborhood. Also, note comments regarding retaining walls and noise walls made under Chapter 5.6 — Visual Quality. Barring any detrimental noise impacts to the Renton Hill neighborhood, Noise Barrier West 2 will provide great benefit to downtown Renton and the South Renton neighborhood. The pending construction of a retaining wall in the Renton Nickel project is a clear and present opportunity to include a rather short Noise Barrier West 2 at a very reasonable cost. CHAPTER 5.3 — WATER AND AQUATIC RESOURCES On page 5-28, Exhibit 5-11 shows an open channel along Main Ave S and Benson Rd S adjacent to Renton City Hall. Appendix M — Floodplains Discipline Report and Appendix V - Surface Water and Water Quali1y Discipline Report 1. The Floodplains Discipline Report states that any filling within the floodplain will be mitigated for by excavation of equivalent volumes and elevation at the Springbrook Early Environmental Investment Site which is now the City of Renton/WSDOT Springbrook Creek Wetland and Habitat Mitigation Bank (Bank). The City will allow the use of the Bank for floodplain fill that occurs in areas that are off the main channel of Springbrook Creek. Any fill that occurs within the main channel of Springbrook Creek must be mitigated at the same location in the channel. For project fills that are mitigated at the Bank, WSDOT must demonstrate (through hydraulic analysis) that there will be no drainage impacts upstream or downstream of the area to be filled. WSDOT can use their share of the surplus compensatory storage created by the Bank that is in excess of the flood storage needed to meet the City's flood hazard reduction requirements as defined in the approved Eastside Green River Watershed Project EIS hydraulic model. As previously stated in the City's EA Scoping Comments Letter, WSDOT must identify all existing culvert crossings (culverts that convey upstream flows through WSDOT right-of-way) impacted by the project, and perform the necessary hydrologic and hydraulic analysis to verify the culverts have adequate capacity and material condition to convey the 100-year storm for the total tributary basin assuming existing land use conditions. Any improvements to cross culverts necessary to meet the above conditions will be at WSDOT's expense. New culverts and storm systems must be designed to meet the 2005 KCSWDM and the DOT Highway Runoff Manual. If culvert improvements are needed under existing land use conditions, WSDOT shall determine tributary flows under future land use conditions. The City will then decide whether to pay the cost to increase culvert size to convey the 100- year future conditions flow. H:\File Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1-405\Nickel Project\EA Discipline Reports\I-405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 0, 2006 Page 4 of 8 Culverts that appear to be impacted by the project and may require improvements include: • Culvert crossing of I-405 that conveys runoff from the ditch that runs along the north side of I-405 to the ditch on the south side of I-405 (MP 1.95). • Culvert crossing of I-405 that conveys runoff from the west side of Lind Avenue north of I-405 to the ditch that runs along the south side of I-405 (MP 2.25). • Culvert crossing of I-405 that conveys runoff from the north side of Talbot Hill to Rolling Hills Creek at the Renton Village Shopping Center (MP 2.65). • Culvert crossing of I-405 that conveys Rolling Hills Creek to the pipe system along Talbot Road and east of Renton Village (MP 2.76). • Culvert crossing of I-405 that conveys Thunder Hills Creek to concrete flume behind Sam's Club (MP 3.05). 3. At the time the Scoping Report was completed, WSDOT had not yet identified what water quality retrofitting of existing pavement would be required under future projects. Does WSDOT now have a better understanding of what retrofitting is required, and if so, what will be the approach? If retrofitting is required for future improvements, will the facilities constructed as part of the Nickel Project be designed for future expansion? 4. What water quality facility is proposed for I-405 between Tukwila and SR-167? Exhibit 4 of the Surface Water and Water Quality Discipline Report does not show a treatment facility nor is one identified in the conceptual design plans. At one time, a facility using ecology embankments was proposed for the area southwest of the 1-405 crossing of Springbrook Creek. 5. Based on previous meetings with WSDOT storm water design staff, improvements were proposed for the existing ditch that runs along the south side I-405. However, the draft conceptual plans show no improvements to this ditch. This ditch currently conveys runoff from I-405 and the areas upstream of I-405 on the north side of the freeway. WSDOT also proposed to use the ditch to convey discharge from the proposed detention facility located between I-405 and SW 16th Street. CHAPTER 5.4 — PUBLIC SERVICES AND UTILITIES On page 5-40, "How will project construction affect public services and utilities?" The last major construction project related to the S-curves was in the mid 90's. Emergency crews responded to a variety of motor vehicle accidents (MVA) related to this construction project. Pavement transitions resulted in single unit motorcycle accidents. A lack of lighting at night combined with little or no pavement striping resulted in a number of improper lane change MVAs. A lack of emergency parking in the construction zone was also characteristic of this project and placed emergency response crews at risk after arrival at emergency scenes. HAFile Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1-405Wickel Project\EA Discipline Reports\1 405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 9, 2006 Page 5 of 8 For the duration of the construction of the Renton Nickel project, the Renton Fire Department makes the following recommendations: • Proper signage is needed to warn motorcyclists of pavement transitions. • Adequate lighting needs to be maintained at night in the construction corridor. • Adequate line striping to identify all lanes of travel needs to be maintained in the construction corridor. • Maintain emergency parking lanes during construction. Appendix T — Social Disci lip ne Report On page 39, the Narco property is listed as a 15-acre site. This parcel is a total of 57 acres, 15 of which can be developed into active recreational use. Parking is listed as 100 to 150 vehicles and should be revised to 358 as adopted in the City's Tri-Park Master Plan. On page 39, the text should be revised to reflect that the Cedar River Trail extends from Lake Washington southeast to Maple Valley for a total of 12 miles of paved trail. On page 42, the City concurs that local comprehensive plans and policies call for the proposed Oakesdale Trail, which "would extend the existing sidewalkibike lane in the middle section of the proposed route." On page 43, the Burnett Trail, Phase I trail construction was completed in 2006 in Burnett Linear Park; Phase II is expected to be constructed in 2007. On page 43, under "Narco and Panther Creek Sites", please note the adoption of the Tri-Park Master Plan by the City of Renton on September 25, 2006. On page 51, line 2-3, regarding the statement "The improvements will not prevent the city from completing this (Oakesdale) proposed trail." The statement is only accurate if the new I-405 Oakesdale/Springbrook Bridge provides a wider clearance over Oakesdale Ave than currently exists. On page 52, paragraph 1, the discipline report identifies that the City plans to extend the Thunder Hills Creek Trail north to intersect with the Benson Trail along Benson Road, on the west side of I-405. The report does not identify that such an extension will require crossing underneath I-405. The discipline report should address how the additional widening of I-405 will affect this future trail extension and 1-405 undercrossing, including possible recommendations and accommodations to ensure the future extension. Appendix W— Transportation Discipline Report On page 24, it appears that the title for this page should be Exhibit 11, not 10. H:`,File Sys TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects'.WSDOT 1-405\Nickel Project\EA Discipline Reports1-405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 9, 2006 Page 6 of 8 CHAPTER 5.5 — HISTORIC, CULTURAL, AND ARCHAEOLOGICAL, AND SECTION 4(F) EVALUATION Appendix S —Section 469 Discipline Report On page 24, the Narco community park property is identified as "not significant as a park." The City disagrees with this designation. Although not currently developed, this property is of significant size and is identified in the City's Tri-Park Master Plan as a significant park property with active and passive recreation features, including the regional Cedar River Trail. On page 41, clarification is needed regarding noise walls in the vicinity of Cedar River and Liberty parks. The Noise and Vibration DR indicates that a noise wall along Liberty Park is not feasible or reasonable. The City questions the "not feasible" determination, but acknowledges that this wall may not be reasonable in the context of this project because the extent of work in this area will be restriping only. The Noise and Vibration DR indicates that a noise wall along Cedar River Park is feasible but not reasonable. The City acknowledges that this wall may not be reasonable in the context of this project because the extent of work in this area will be restriping only. On page 41, the Section 4(f) DR states, "WSDOT determined that users of these parks represent a small number and that mitigation would not be feasible." The Liberty Park/Cedar River Park complex is second to Gene Coulon Park in the City of Renton in terms of annual usage. These two parks include a stadium, picnic shelter, community center with an outdoor event patio/lawn, community theater, and aquatic center. With the above statement, it would seem WSDOT would never build a noise wall for a park because parks do not have sufficient users. The City questions this reasoning. CHAPTER 5.6 — VISUAL QUALITY On page 5-53 in the margin text "How are Context Sensitive Solutions (CSS) used for this project?" the City notes that the CSS guidelines will be applied fully to permanent elements. On page 5-55 within the fifth paragraph, the Oakesdale/Springbrook I-405 Bridge should also be identified as a permanent project element that will receive the "full" CSS treatments. City officials have expressed their desire that visible elements of this project be aesthetically pleasant, even project elements that are not permanent master plan elements receiving the full CSS treatment. The more visible temporary project elements include noise walls and retaining walls. H:'File Sys TRP - Transportation Planning & Programming`,TRP-10 - Transportation Planning Projects\WSDOT 1-405\Nickel Project\EA Discipline Reports`.I-405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 9, 2006 Page 7 of 8 On page 5-55, the DR indicates that temporary project elements will receive "limited" architectural treatment consisting of textured concrete surfaces and darkened concrete surfaces. The City would appreciate some level of involvement or coordination with WSDOT regarding this "limited" architectural treatment, prior to design and construction. Appendix Y— Visual Quality Disc line Report On page 50, the DR states, "...the permanent project elements will have the "full" CSS guidelines applied where appropriate and practicable..." On page 52, the I-405 Oakesdale/Springbrook Bridge should also be identified as "a main project feature that will receive the "full" CSS treatments ... because it is a permanent project element." CHAPTER 5.7 — SOILS, GEOLOGY, AND GROUNDWATER On page 5-62 under Groundwater, because the additional lanes will begin/end at the SR 169 ramps, construction activities, even if only restriping, will occur over the City's sole -source aquifer recharge area and these activities will be subject to the Renton Municipal Code requirements for construction activities in the City's Aquifer Protection Areas. Appendix B — Avoidance, Minimization and Mitigation Measures On page B-6 second paragraph, the City anticipates coordinating with WSDOT regarding temporary closures and detours for all affected City streets and for the I-405 and SR 167 mainlines. Partial or full closures of I-405 and SR 167 mainlines will cause rerouting of traffic onto City streets. On page B-9, it should be noted under Social that the I-405 Oakesdale/Springbrook Bridge will be constructed in order to allow for the completion of the Oakesdale Trail bicycle lanes, as identified in the "Social Discipline Report." On page B-9, under Noise and Vibration, as a result of previous comments made on the "Noise and Vibration Discipline Report", a second noise wall should be noted in this section. On page B-12, the second paragraph should also identify the I-405 Oakesdale/Springbrook Bridge as a project feature that will receive the "full" CSS treatments because it also is a permanent project element. H:`File Sys'TRP -Transportation Planning & Programming\TRP-10 -Transportation Planning ProjectsWSDOT 1405\Nickel Project\EA Discipline Reports' 1405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 9, 2006 Page 8 of 8 Again, thank you for the opportunity to submit comments on this environmental assessment. Should you have any questions or concerns, please contact Peter Hahn, Deputy PBPW Administrator — Transportation, at (425) 430-7242. Sincerely, 'n dell olet�flolf^ Gregg Zimmerman, P.E., Administrator Planning/Building/Public Works Department cc: Jay Covington, Chief Administrative Officer Alex Pietsch, EDNSP Administrator Terry Higashiyama, Community Services Administrator Peter Hahn, Deputy PBPW Administrator — Transportation Stan Engler, Fire Marshal Lys Hornsby, Utility Systems Director Leslie Betlach, Parks Department Director Ron Straka, Surface Water Utility Supervisor Jim Seitz, Transportation Planning & Programming Supervisor Keith Woolley, Transportation Planning & Programming File H:\File Sys\TRP - Transportation Planning & Programming \TRP-10 - Transportation Planning Projects\WSDOT 1 405\Nickel Project\EA Discipline Reports\1405 Renton Nickel EA Comments.doc November 10, 2006 Allison Ray Washington State Department of Transportation 600 —108t' Avenue NE, Suite 405 Bellevue, WA 98004 SUBJECT: I-405 RENTON NICKEL IMPROVEMENT PROJECT, I-5 TO SR 169 ENVIRONMENTAL ASSESSMENT (OCTOBER 2006) COMMENTS Dear Ms. Ray: Thank you for the continued collaborative effort between WSDOT and the City on the planning and design of improvements to the I-405 corridor. The City of Renton submits the following comments for consideration with regards to the I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment. CHAPTER 1 — SUMMARY On page 1-2, paragraph 5, and page 1-3, "Noise and Vibration", revise based on following comments on Appendix Q. CHAPTER 4 — DESCRIPTION OF THE PROJECT On page 4-9, Exhibit 4-8 shows an open channel along Main Ave S / Benson Rd S from S 4"' Street to the Sam's Club property. This does not seem accurate. On page 4-11, the text states that "the project will not affect the I-405 bridges over the Green River, Lind Avenue, or the Cedar River." I-405 does not go over Lind Ave. On both page 4-11 and 4-14, is the Lind Avenue bridge impacted by the retaining wall on the south side of I-405 underneath Lind Avenue? The City has a water main attached to the underneath of the Lind Avenue structure and wants to be sure this water main is not affected. On page 4-17, the City notes "The new I-405 nouhbound and northbound bridges over Springbrook Creek and Oakesdale Avenue will also receive CSS treatments". I-405 Renton Nick 1 Improvement Project, I-5 to SR 169 Environmental Assessment, November 10, 200 Page 2 of 7 D d CHAPTER 5.1 — NOISE AND VIBRATION On page 5-19, the City disagrees with the determination that only one noise wall is both reasonable and feasible. Please see the following comments on Appendix Q. Appendix Q — Noise and Vibration Discipline Report The City disagrees with the determination that Noise Barrier West 2 is not feasible or reasonable. This, conceptual noise wall runs along the west side of I-405 between the Cedar Avenue overpass and Renton City Hall. Exhibit 12 states that a near source barrier for an elevated roadway is "very effective". The text on page 23 indicates even a short wall can be effective with a near source barrier and an elevated roadway. Such would be the case with Noise Barrier West 2. On page 31, first paragraph, the text states that the effectiveness of noise barriers was evaluated at the outermost boundary of the right-of-way. Certainly for Noise Barrier West 2, evaluating the noise barrier at the outermost boundary of the right-of-way would be erroneous, as the right- of-way line appears to be located at the base of the slope immediately adjacent to Main Ave S. On page 32, the DR states that the study area for the noise analysis extends approximately 1,000' from the project. The modeled noise receptors for Noise Barrier West 2 should have included the Spencer Apartments (334 Wells Ave S), a 72-unit senior living, affordable housing apartment complex located less than 400' from the I-405 Renton Nickel project. The City agrees that Main Ave S contributes to noise. However, Main Ave S noise is not constant 24 hours a day like the I-405 corridor, and therefore the noise analysis should factor the I-405 noise when Main Ave S is "quiet". On page 56, Noise Barrier West 2 is certainly feasible when Main Ave S has reduced traffic, such as during the late -night hours (12pm — 5am). WSDOT policy elsewhere, such as the I-5 express lanes, is to reduce noise in these hours. The planning level costs used to evaluate noise barriers (Exhibits 30-33, 35) all use $32.31 per square foot of barrier, regardless of the location or situation. The exception is that the planning level cost for Noise Barrier East 3 was then almost doubled to account for existing conditions. No planning level cost was provided for Noise Barrier West 2, however the planning level cost should be significantly less than $32.31 per square foot because a retaining wall is already being constructed in this area essentially already completing the substructure foundations/footings. To add an additional 8 feet in height above the jersey -type safety barrier above the retaining wall for approximately 1,300 linear feet would likely be less than $200,000. HAFile Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1405\Nickel Project\EA Discipline Reports\1-405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment" November 10, 2006 Page 3 of 7 Therefore, the City's opinion is that the EA should be amended such that Noise Barrier West 2 is determined to be feasible and reasonable. The EA should then include additional analysis to determine that Noise Barrier West 2 will not, by way of deflection, introduce additional noise to the Renton Hill neighborhood. Also, note comments regarding retaining walls and noise walls made under Chapter 5.6 — Visual Quality. Barring any detrimental noise impacts to the Renton Hill neighborhood, Noise Barrier West 2 will provide great benefit to downtown Renton and the South Renton neighborhood. The pending construction of a retaining wall in the Renton Nickel project is a clear and present opportunity to include a rather short Noise Barrier West 2 at a very reasonable cost. CHAPTER 5.3 — WATER AND AQUATIC RESOURCES On page 5-28, Exhibit 5-11 shows an open channel along Main Ave S and Benson Rd S adjacent to Renton City Hall. Appendix M — Floodplains Discipline Report and Appendix V — Surface Water and Water Quality Discipline Report l . The Flooplains Discipline Report states that any filling within the floodplain will be mitigated for by excavation of equivalent volumes and elevation at the Springbrook Early Environmental Investment Site which is now the City of Renton/WSDOT Springbrook Creek Wetland and Habitat Mitigation Bank (Bank). The City will allow the use of the Bank for floodplain fill that occurs in areas that are off the main channel of Springbrook Creek. Any fill that occurs within the main channel of Springbrook Creek must be mitigated at the same location in the channel. For project fills that are mitigated at the Bank, WSDOT must demonstrate (through hydraulic analysis) that there will be no drainage impacts upstream or downstream of the area to be filled. WSDOT can use their share of the surplus compensatory storage created by the Bank that is in excess of the flood storage needed to meet the City's flood hazard reduction requirements as defined in the approved Eastside Green River Watershed Project EIS hydraulic model. 2. As previously stated in the City's EA Scoping Comments Letter, WSDOT must identify all existing culvert crossings (culverts that convey upstream flows through WSDOT right-of- way) impacted by the project, and perform the necessary hydrologic and hydraulic analysis to verify the culverts have adequate capacity and material condition to convey the 100-year storm for the total tributary basin assuming existing land use conditions. Any improvements to cross culverts necessary to meet the above conditions will be at WSDOTs expense. New culverts and storm systems must be designed to meet the 2005 KCSWDM and the DOT Highway Runoff Manual. If culvert improvements are needed under existing land use conditions, WSDOT shall determine tributary flows under future land use conditions. The City will then decide whether to pay the cost to increase culvert size to convey the 100-year future conditions flow. Culverts that appear to be impacted by the project and may require improvements include: HAFile Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1405\Nickel Project\EA Discipline Reports\4405 Renton Nickel EA Comments.doc I 405 R N' k 1 I t P t I 5 t SR 169 Envir t 1 A m n enton Ic a mprovemen roJec o o, - nmen a ssess November 10, 2006 n� W nd, Page 4 of 7 • Culvert crossing of I-405 that conveys runoff from the ditch that runs along the northside of I-405 to the ditch on the southside of I-405 (MP 1.95). - • Culvert crossing of I-405 that conveys runoff from the west side of Lind Avenue north of I-405 to the ditch that runs along the south side of I-405 (MP 2.25). • Culvert crossing of I-405 that conveys runoff from the north side of Talbot Hill to Rolling Hills Creek at the Renton Village Shopping Center (MP 2.65). • Culvert crossing of I-405 that conveys Rolling Hills Creek to the pipe system along Talbot Road and east of Renton Village (MP 2.76). • Culvert crossing of I-405 that conveys Thunder Hills Creek to concrete flume behind Sam's Club (MP 3.05). 3. At the time the Scoping Report was completed, WSDOT had not yet identified what water quality retrofitting of existing pavement would be required under future projects. Does WSDOT now have a better understanding of what retrofitting is required, and if so, what will be the approach? If retrofitting is required for future improvements, will facilities constructed as part of the Nickel Project be designed for future expansion? 4. What water quality facility is proposed for I-405 between Tukwila and SR-167? Exhibit 4 of the Surface Water and Water Quality Discipline Report does not show a treatment facility nor is one identified in the conceptual design plans. At one time, a facility using ecology embankments was proposed for the area southwest of the I-405 crossing of Springbrook Creek. 5. Based on previous meetings with WSDOT storm water design staff, improvements were proposed for the existing ditch that runs along the south side I-405. However, the draft conceptual plans show no improvements to this ditch. This ditch currently conveys runoff from I-405 and the areas upstream of I-405 on the north side of the freeway. WSDOT also proposed to use the ditch to convey discharge from the proposed detention facility located between I-405 and SW Wh Street. CHAPTER 5.4 — PUBLIC SERVICES AND UTILITIES On page 5-40, "How will project construction affect public services and utilities? - The last major construction project related to the S-curves was in the mid 90's. Emergency crews responded to a variety of motor vehicle accidents (MVA) related to this construction project. Pavement transitions resulted in single unit motorcycle accidents. A lack of lighting at night combined with little or no pavement striping resulted in a number of improper lane change MVAs. A lack of emergency parking in the construction zone was also a characteristic of this project that placed emergency response crews at risk after arrival at emergency scenes. H:\File Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1405\Nickel Project\EA Discipline Reports\1405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 10, 2006 Page 5 of 7 d �t U , For the duration of the construction of the Renton Nickel project, the Renton Fire Department makes the following recommendations: • Proper signage is needed to warn motorcyclists of pavement transitions. • Adequate lighting needs to be maintained at night in the construction corridor. • Adequate line striping to identify all lanes of travel needs to be maintained in the construction corridor. • Maintain emergency parking lanes during construction. Appendix T — Social Discipline Report On page 42, the City concurs that local comprehensive plans and policies call for the proposed Oakesdale Trail, which "would extend the existing sidewalk/bike lane in the middle section of the proposed route." On page 51, line 2-3, regarding the statement "The improvements will not prevent the city from completing this (Oakesdale) proposed trail" The above statement is only accurate if the new I-405 Oakesdale / Springbrook bridge provides a wider clearance over Oakesdale Ave than currently exists. On page 62, paragraph 1, the discipline report identifies that the City plans to extend the Thunder Hills Creek Trail north to Benson Road S. The report does not identify that such an extension requires crossing (underneath?) I-405. The discipline report should address how the additional widening of I-405 will affect this future trail extension and I-405 crossing, including possible recommendations and accommodations to ensure the future extension. 4ppendix W — Transportation Discipline Report On page 24, it appears that the title for this page should be Exhibit 11, not 10. CHAPTER 5.5 — HISTORIC, CULTURAL, AND ARCHAEOLOGICAL, AND SECTION 4(F) EVALUATION Appendix S —Section 4 Discipline Report On page 24, the Narco community park property is identified as "not significant as a park". The City disagrees with this designation. Although not currently developed, this property is of significant size and is identified in the City's Tri-Park Master Plan as a significant park property with active and passive recreation features. On page 41, clarification is needed regarding noise walls in the vicinity of Cedar River and Liberty Parks. HAFile Sys\TRP - Transportation Planning & Program mi ng\TRP- 10 - Transportation Planning Projects\WSDOT 1405\Nickel Project\EA Discipline Reports\1 405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment ' November 10, 2006 0 Page 6 of 7 ,. _ � S The Noise and Vibration DR indicates that a noise wall along Liberty Park is not.feasible or reasonable. The City questions the "not feasible" determination, but acknowledges that.this wall may not be reasonable in the context of this project because the extent of work in this area will be restriping only. The Noise and Vibration DR indicates that a noise wall along Cedar River Park is feasible but not reasonable. The City acknowledges that this wall may not be reasonable in the context of this project because the extent of work in this area will be restriping only. On page 41, the Section 4(f) DR states that "WSDOT determined that users of these parks represent a small number and that mitigation would not be feasible". The Liberty Park / Cedar River Park complex is second to Gene Coulon Park in the City of Renton in terms of annual usage. These two parks include a stadium, picnic shelter, community center with an outdoor event patio/lawn, community theater, and aquatic center. With the above statement, it would seem WSDOT would never build a noise wall for a park because parks do not have sufficient users. The City questions this reasoning. CHAPTER 5.6 — VISUAL QUALITY On page 5-53 in the margin text "How are Context Sensitive Solutions (CSS) used for this project?", the City notes that the CSS guidelines will be applied fully to permanent elements. On page 5-55 within the fifth paragraph, the Oakesdale / Springbrook I-405 bridge should also be identified as a permanent project element that will receive the "full" CSS treatments. City elected officials have expressed their desire that visible elements of this project be aesthetically pleasant, even project elements that are not permanent master plan elements receiving the full CSS treatment. The more visible temporary project elements include noise walls and retaining walls. On page 5-55, the DR indicates that temporary project elements will receive "limited" architectural treatment consisting of textured concrete surfaces and darkened concrete surfaces. The City would appreciate some level of involvement or coordination with WSDOT regarding this "limited" architectural treatment, prior to design and construction. Appendix Y— Visual Quali Discipline Report On page 51, the DR states, "the permanent project elements will have the "full" CSS guidelines applied where appropriate and practicable. On page 52, the I-405 Oakesdale / Springbrook bridge should also be identified as "a main project feature that will receive the "full" CSS treatments ... because it is a permanent project element". HAFile Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1405\Nickel Project\EA Discipline Reports\I-405 Renton Nickel EA Comments.doc I-405 Renton Nickel Improvement Project, I-5 to SR 169 Environmental Assessment November 10, 2006 Page 7 of 7 A endix B — Avoidance Minimization and Mitigation Measures PP S 1, On page B-6 second paragraph, the City anticipates coordinating with WSDOT regarding temporary closures and detours for both affected city streets and for the I-405 and SR 167 mainlines. Partial or full closures of 1-405 and SR 167 mainlines will cause rerouting of traffic onto city streets. On page B-9, it should be noted under "Social" that the I-405 Oakesdale / Springbrook bridge will be constructed in order to allow for the completion of the Oakesdale Trail bicycle lanes, as identified in the Social Discipline Report. On page B-9, under "Noise and Vibration", as a result of previous comments made on the Noise and Vibration Discipline Report, a second noise wall should be noted in this section. On page B-12, the second paragraph should also identify the I-405 Oakesdale / Springbrook bridge as a project feature that will receive the "full" CSS treatments because it also is a permanent project element. Again, thank you for the opportunity to submit comments on this environmental assessment. Should you have any questions or concerns, please contact Peter Hahn, Deputy PBPW Administrator — Transportation, at (425) 430-7242. Sincerely, Gregg Zimmerman, P.E., Administrator Planning/Building/Public Works Department cc: Jay Covington, Chief Administrative Officer Alex Pietsch, EDNSP Administrator Terry Higashiyama, Community Services Administrator Peter Hahn, Deputy PBPW Administrator — Transportation Stan Engler, Fire Marshall Lys Hornsby, Director, Utility Systems Leslie Betlach, Director, Parks Department Ron Straka, Surface Water Utility Supervisor Jim Seitz, Transportation Planning & Programming Supervisor Keith Woolley, Transportation Planning & Programming File H:\File Sys\TRP - Transportation Planning & Programming\TRP-10 - Transportation Planning Projects\WSDOT 1405\Nickel Project\EA Discipline Reports\1 405 Renton Nickel EA Comments.doc I-405 Coordination City° i)esign 'Feam Meeting Meeting Agenda Conference Room 511 November 8, 2006 1:30-2:45 PM 1. I-405: 1-5 to SR 169 Widening Proje t ("Nickel") a. Environmental Assessment - Comments: 25 in due to Transportation yesterday, Nov 7th due to WSDOT Friday, Nov loth comments include 2° noise wall, visual treatment, maintenance of traffic, Oakesdale Ave - Public Hearing was on Oct 26th Conceptual Plans -- 6r,-r,r,,8 c yi n 0V t 3 c. - Memorandum of Agreement (not yet received from WSDOT) d. - Design -Builder's voluntary submittal meeting - Nov 301h e. - Property Negotiations 2. Task Force Updates: a. CSS (Context Sensitive Solutions) 15 in - Oakesdale Ave undercrossing - review of options b. Environmental Task Force 10 m - Springbrook "Splash" scheduled for Nov 30 3. Other: City / WSDOT / BNSF Update - "bF - 5. (—tom'` 10 m 4. Admin/Exec Meeting Dec 14 - Agenda Discussion loin 5. Potential topics for next week's (Nov 151) WSDOT/Renton coordination Mtg 5 in 6. Upcoming Meetings Nov 91h - Renton CEO Roundtable Meeting's Nov 15'h - Monthly Coordination Mtg with WSDOT staff Possibly - Utilities Task Force, Permitting Task Force Nov 301h - Springbrook "Splash", Voluntary Submitters Mtg Unscheduled - Traffic Task Force, Emergency Response Task Force Congestion Relief & Bus Rapid Transit Projects RECEIVED o C r o 3 2006 October 2, 2006 CITY OF RENTON UTILITY SYSTEMS TO: Citizens and Interested Parties FROM SUBJECT: Allison Ray, I-405 Environmental Manager s� Renton Nickel Improvement Project Environmental Assessment Please find enclosed a copy of the Renton Nickel Improvement Project Environmental Assessment for your review. The comment period for this document will be open from October 2, 2006 until November 10, 2006. Any comments should be postmarked or received by November 10, 2006 to the following address: Allison Ray, I-405 Environmental Manager Washington State Department of Transportation 600 108th Avenue NE Suite 405 Bellevue, Washington 98004 Or email rayalli@wsdot.wa.gov A public hearing on this environmental assessment will be held on October 26, 2006, at the Renton High School, 400 South Second Street, Renton, from 4 PM to 7 PM. Thank you for your participation in the I-405 Project. Enclosure Adw WrWashington State Department of Transportation Congestion Relief & Bus Rapid Transit Projects RECEIVED OCT 16 2006 CITY OF RENTON UTILITY SYSTEMS October 14, 2006 To: Resource Agencies/Tribal staff From: Allison Ray, 1-405 Project Enviromental Manager 600 — 108th Avenue NE, Suite 405 Bellevue, WA 98004 Main 425-456-8500 Fax 425-456-8600 RE: 1-405 Renton Nickel Improvement Project, SEPA DNS Comment Period The 1-405 Renton Nickel Improvement Project SEPA Determination of Nonsignificance (DNS) will be published on October 16fh. The comment period for the SEPA DNS extends from October 16, 2006, through October 29, 2006. All comments on the SEPA DNS can be sent to me via mail or email per the contact information below. The 1-405 Renton Nickel Improvement Project is adopting the 1-405 Renton Nickel Improvement Project Environmental Assessment (EA) as our SEPA checklist. You should have already received a copy of the EA. The comment period for the Environmental Assessment will close on November 10th. All comments must be received or postmarked by that date, and comments can be sent to me via mail or email per the contact information below. Please contact me if you have any questions. Thank you, Allison Ray 1-405 Project Environmental Manager 425.456.8610 rayalli@wsdot.wa.gov DETERMINATION OF NONSIGNIFICANCE (DNS) 1-405 Renton Nickel Improvement Project, 1-5 to SR 169 Description of proposal: WSDOT intends to improve Interstate 405 (I-405) from Interstate 5 (I-5) to SR 169. These improvements are a part of the I-405 Corridor Program. The Proposed Action includes the following improvements to support construction and operation of the facility: • Constructing one new northbound general-purpose lane and one new southbound general-purpose lane on I-405 from 1-5 to SR 167 and from SR 167 to SR 169; • Constructing one new southbound general-purpose lane on SR 167 from I-405 to the SW 41" Street off -ramp; • Extending the SR 167 southbound HOV lane north to begin at I-405; • Replacing the Benson Road Bridge on a new alignment that will include bike and pedestrian facilities; and • Replacing the I-405 bridges over Springbrook Side Channel and Oakesdale Avenue with new southbound and northbound bridges. Other features of the project include: • Replacing the bridge rails on the I-405 bridges over the Burlington Northern/Santa Fe (BNSF) and Union Pacific (UP) railroad tracks, and over SR 515 (Talbot Road); • Improving stormwater treatment, detention and conveyance; • Using design principles and adding architectural treatments to improve the highway's appearance; and • Incorporating numerous measures to avoid or minimize effects to the environment. The Renton Nickel Improvement Project will provide many short- and long-term benefits. Some of these benefits are: • Reducing travel times and improving operations in the project area; • Improving response time for emergency service vehicles along I-405 and SR 167; 0 Improving safety; • Building a noise wall along the north side of the Talbot Hill neighborhood to reduce highway noise; • Removing the existing box culvert at Springbrook Creek and improving the streambed; and • Mitigating for fill in lower -quality wetlands by using credits from Springbrook Creek Mitigation Bank, a higher -quality wetland complex. Location of proposal, including street address, if any: The Renton Nickel Improvement Project extends for approximately 3.6 miles along I-405 from I-5 to SR 169 and along SR 167 from I-405 to the SW 415t Street ramp off -connection. Proponent/Lead Agency: Washington State Department of Transportation Determination: The lead agency for this proposal has determined that it does not have a probable significant adverse impact on the environment. An environmental impact statement (EIS) is not required under RCW 43.21C.030 (2)(c). This decision was made after review of a completed environmental checklist and other information on file with the lead agency. This information is available to the public on request. Please note that our checklist document is titled I-405 Renton Nickel Improvement Project, I-5 to SR 169, Environmental Assesstnent and it was completed in October 2006. The document is available to view during normal business hours at: 1-405 Project Office, 600 -1081h Avenue NE, Suite 405, Bellevue; Bellevue Regional Library; Bellevue Community College; Foster Library; Highlands Public Library; Renton Public Library; Skyway Library; Tukwila Regional Library; and the University of Washington Library (Suzzalo and Bothell). The document is also available electronically at www.wsdot.�va.gov/1)rojects/i405/corridor/library/rentea ❑ There is no comment period for this DNS. 21 This DNS is issued tinder WAC 197-11-340(2); the lead agency will not act on this proposal for 14 days from the date below. Comments must be submitted by October 29, 2006. Responsible Official: Allison Ray Position/Title: WSDOT I-405 Project Environmental Manager Address: 1-405 Project Office 600 —1081h Avenue NE, Suite 405 Bellevue, WA 98004 Phone: 425-456-8610 * k Date: October 16, 2006 I Signature: s AGENCY COMMENTS 3.4. Written Comments Received by Mail from Agencies The following letter was received from the City of Renton. Responses to the letter are shown in the boxes along the right side of each page. February 10, 2005 Allison Ray, 1-405 Renton Nickel Project Environmental Manager Washington State Department of Transportation 1-405 Project Team Office 600 - 108th Avenue NE, Suite 405 Bellevue, WA 98004 Subject: 1-405 Renton Nickel Project Environmental Assessment Scoping Comments Dear Ms. Ray: The City of Renton submits the following comments for consideration with regards to the Renton Nickel Project Environmental Assessment (EA) Scoping. General: The City may request that WSDOT have an independent Environmental Coordinator while constructing these projects. One was used during the 1-405 Renton I/C to Sunset Boulevard (Renton "S" Curves) Project, and having this independent expertise worked very well and assured proper attention was given to these issues. Water Utility: The project will impact the City's existing drinking water wells and water treatment facilities. The City requests: 1. Geo-technical investigation and analysis of impact to groundwater quality and quantity from the construction of support structures penetrating the City's drinking water well field and the Cedar Valley Aquifer. Provide basis for all analyses and conclusions made in the evaluation. 2. Development of a detailed water quality monitoring plan for potential groundwater contamination from construction activities and from accidental spills of hazardous chemicals. 3. Development of an emergency response and recovery plan in the event of a hazardous chemical spill. Transportation: City Arterials and Local Streets The EA should address potential changed traffic patterns and mitigations on City streets due to the reduction in 1-405 capacity caused by reduced shoulders and lane shifts. Currently, backups on 1-405 approaching SR 167 result in increased traffic on Bronson, Main, Grady, Benson, and South 43rd Street. The EA should address potential traffic mitigation due to any short-term closures of 1-405 related to the Benson Road Overpass reconstruction. For example, the City Renton Nickel Improvement Project Scoping Report rA014561task fteoping meetings\scoping _final 0401 The size of the Renton Nickel Improvement Project does not warrant WSDOT providing staffing to the City of Renton. WSDOT will consider, on a case -by -case basis, providing the City of Renton with staff if a larger 1-405 project is funded. As stated in the Memorandum of Understanding, "WSDOT and the City will, on a case -by -case basis, negotiate costs associated with the staffing needs to assist City coordination, review, and comments." 1. Golder Associates is writing the Renton Nickel 'Geology, Soils and Groundwater' discipline report. In this report, the Cedar Valley Aquifer will be discussed. Golder Associates have also been retained to write the 'Soils and Groundwater' discipline report for the Renton -to -Bellevue project, and they have attended several coordination meetings with Renton city officials, as requested, to discuss the Cedar Valley Aquifer and potential effects. The Renton - to -Bellevue Geotechnical/Environmental discipline report is in draft form and will be released later this year. The Report discusses the aquifer and potential effects of construction. 2. The above mentioned Report indicates that the SPCC Plan will address fuel and chemical spills. 3. Comment noted. A Spill Control and Countermeasures Plan will be defined as deliverable in the Design/ Build RFP document. The EA will cover any effects associated with changes in travel patterns resulting from the Renton Nickel Improvements Project, The EA will cover construction impacts as they relate to traffic. 43 AGENCY COMMENTS anticipates Bronson/Main/Grady as the only potential detour option. Potential improvements to this route to accommodate 1-405 diverted traffic should be addressed, such as the SR-900/SR-515 intersection. The sign bridge for southbound (SB) SR 167 located north of 1-405 currently limits the northbound (NB) left -turn storage at Grady Way. The northward extension of the SB SR 167 HOV lane will trigger a review of SR 167 southbound signage south of Grady Way. As part of this EA, the City recommends WSDOT review the jersey barrier to c-curb SR 167 median transition in the vicinity north of I- 405. Pedestrian / Non -Motorized The EA should address continuous safe and convenient pedestrian access through the 1-405 work area, including Longacres Drive, Oakesdale, Lind, Talbot, and Benson. The Springbrook Trail also crosses under 1-405 in the vicinity of Oakesdale. The EA should address trail impacts, closures, details, etc., including appropriate notification to the public. A long-term desire of the City is to have pedestrian access from Benson Road to Talbot Road in the vicinity of 1-405. Traffic Modeling and Simulation Research has shown long-term construction zone impacts to freeway capacity and to diversion routes on arterials. Traffic modeling and simulation should be conducted using appropriate tools in order to fully identify and understand the impacts on local arterials, streets and intersections during construction. Benson Road Overpass WSDOT and the City will continue to analyze the traffic, non -motorized, and emergency response operations for two options for replacement of the Benson Road overpass — either, 1) replacement on new alignment to the west of the existing structure, or, 2) replacement on the existing alignment with a full closure for 6-8 months. The impact of increased truck traffic on Benson Road and any proposed haul routes should be addressed with special consideration given to appraising the impact of heavy dump trucks used to bring in fill (in the case of the 'parallel' option), or, hauling out materials (in the event the 'existing alignment' option is selected). The Benson Road Overpass site is flanked by apartments. WSDOT should address noise issues concerning, but not limited to, such activities as demolition, construction and hauling. City staff and officials must approve of either option before such option proceeds into the design -build contract. 44 Destination information contained on the subject sign bridge, which is beyond the limits of the Renton Nickel Improvement Project, will still apply after the project works are completed. Consequently, no changes to the existing sign bridge are expected at this time. The EA will address all effects on pedestrian access and Section 4(f) resources. The comment is noted, however, please provide the 1-405 team information on how the long-term desire of the City relates to the Renton Nickel Improvement Project. A staging concept will be developed to identify what the potential effects may be on both 1-405 and the local streets. This will be covered in the EA. Depending on the magnitude of the effects, additional modeling may be necessary but will be determined once the staging concept is developed. Only Option 1 (new alignment) will be examined in the EA. Option 1 and Option 2 (same alignment) were examined by the Renton Traffic Analysis Task Force that is comprised of City and 1-405 representatives. Option 2 was dropped from consideration because the impacts to local traffic operations during the closure of Benson Road could not be mitigated, either at the Talbot overcrossing or the intersection of Benson Road with Puget Drive. The team concluded that two additional lanes would be required along Talbot Road to cope with the expected traffic increase during construction of Option 2. Unfortunately, the position of existing bridge piers carrying 1-405 traffic over Talbot Road prevent widening of Talbot Road by two lanes without replacing the Talbot Road structure. Potential effects to City streets and infrastructure caused by construction activities will be evaluated during the Environmental process. In addition, the Design/Build Contractor will have an obligation to comply with all applicable State and City by-laws, weight and height restrictions, hours of operation, etc. while operating on adjacent streets, including Benson Road. WSDOT will address all noise effects, including construction and operation, in the Environmental Assessment. Renton Nickel Improvement Project Scoping Report r1014561task ftcoping meetingslscoping _final 0401 AGENCY COMMENTS Aesthetics / Landscaping Because the Benson Road Overpass replacement will install a "master plan" element, final recommendations of the Context Sensitive Solutions effort should be applied to this element. Aesthetics and landscaping should be addressed in the EA. Specifically, due to proposed extensive use of retaining walls, wall face treatment must be addressed. Motorized Freight Hazard Mitigation The EA should address potential enhancements to the shoulder barriers atop retaining walls to reduce the potential for hazardous materials either running or tipping off the roadway. There are numerous locations within the City where such an incident would have detrimental impacts to the natural environment and to valuable City resources, such as its sole source aquifer. STORMWATER: General Comments 1. Water quantity control (detention) and water quality improvements will be required for all existing and proposed right-of-way improvements. The quantity and quality controls should be designed using a standard equivalent to the most recent edition of the Washington State Department of Ecology Stormwater Management Manual for Western Washington (Ecology Manual). 2. If WSDOT storm systems currently, or are proposed to, discharge to City storm systems, the downstream system capacities should be analyzed and off -site improvements made as part of the project, as needed. The hydrologic and hydraulic analysis would need to account for the total tributary area under future land use conditions. 3. Water quality and quantity impacts should be mitigated for the same local drainage basin so there is no impact immediately downstream of the project. The mitigation will need to show that there are no temporary or long-term impacts due to increased peak rate and volume of runoff, along with changed water quality, downstream of the project. 4. Separate stormwater facilities must be provided for each sub -basin or threshold discharge area as defined in the Ecology Manual. Renton Nickel Improvement Project Scoping Report r.\01456\task 6\sloping meetings\sopping _final 0401 The nickel project is the first phase of the IA05 Master Plan. CSS elements in the nickel project will be examined for how well they transition between existing and new features, as well as temporary and permanent features. CSS will be applied in the nickel project whenever practicable. Comment noted. The Geology, Soils, and Groundwater Discipline Report will examine risks associated with hazardous material accidents. WSDOT Design Standards and mitigation identified in the discipline report will be applied. 1. The Renton Nickel Improvement Project proposes to add less than 10 percent new impervious area. The Master Plan will add more impervious surface and retrofit of existing pavement will be done under the implementation phase. Both the WSDOT and Ecology thresholds for retrofit are required when the project adds more than 50 percent new impervious area. We are investigating ways to add initial mitigation within the right-of-way, but these were not available at the time of the scoping meeting. The WSDOT Highway Runoff Manual is generally deemed equivalent with the Ecology manual but differences exist, and are being discussed between the two state agencies. These differences are primarily due to the linear nature of highway projects, target pollutants, and maintenance of highway corridors. 2. The WSDOT Highway Runoff Manual requires that flow control look at both the frequency of peak flows and the duration of peak flows from the highway corridor. By using this approach, the design can mitigate any potential impact on the downstream systems for flow frequencies between 50% of the 2-year and the 50-year recurrence interval. This is typical of the King County Level 3 flow control. In prior meetings with the City staff, we have agreed to additionally mitigate any potential impact during the 100-year event where practicable. 3. This request is consistent with the WSDOT Highway Runoff Manual requirements which we are following. 4. This request is consistent with the WSDOT Highway Runoff Manual requirements which we are following. 45 AGENCY COMMENTS Upstream flows that are currently being conveyed through WSDOT right-of-way will continue to be conveyed downstream after proposed improvements are constructed. A hydrologic and hydraulic analysis of all existing and proposed culverts and storm systems that cross 1-405 should be performed to verify that the systems have adequate capacity to convey the 100-year/24-hour storm event for the total tributary area under future land use conditions. If the analysis indicates that the system has insufficient capacity, then it should be replaced with a properly sized facility. This is needed to ensure that adequate stormwater conveyance can be provided across the I- 405 corridor and that the project will not create upstream drainage problems. Any City -owned structures that have to be relocated �-4y or are impacted by the project should be fully coordinated with the City as to sizing and location and provided at no cost to the City. If WSDOT proposes an exemption from providing detention and water quality for existing impervious surface (retrofitting), then it must show that the proposed new impervious area does not exceed 50% of the existing impervious surface, within the project limits, which is defined by the project length and width of the right-of-way. Although the redevelopment threshold may not be exceeded for the Nickel Project, it could very well be exceeded for the 1-405 Master Plan where an additional two lanes are proposed. How does WSDOT propose to address this issue? When applying the criteria to determine if the project is exempt from having to retrofit existing and new impervious surfaces for flow control and water quality treatment, the criteria should also include the northbound or southbound lanes where improvements are proposed. 46 SL ZVI` ,6. The 1-405 Team agrees that this is the appropriate time to address potential culvert replacement issues, and suggests that the City and the 1-405 Team initiate a process to identify culverts which need replacing due either to existing flow restriction or anticipated future flow conditions. Compliance with the HRM is presumed to address sizing needs for cross -culverts since provision of stormwater detention facilities mitigates for changes in peak flows. As a result, changes in peak flows and corresponding downstream impacts are not anticipated. Identification of future land uses and future stormwater capacity needs for City areas outside the 1-405 right-of- way is within the expertise of the City. The 1-405 team will, by necessity, look to the City to identify future flow conditions and the locations where culvert upsizing should be considered due to future flows. Once appropriate sizing for cross -culverts is identified, WSDOT and the City can discuss appropriate cost -sharing for these upgrades. The 1-405 Team is also concerned with removing existing cross -culverts that are currently restricting flows, as downstream drainage routes and stormwater facilities may be adversely affected by increased flows if these cross -culverts were to be upsized. While the 1-405 Team is willing to discuss where it can assist the City in obtaining appropriately sized cross -culverts to optimize operation of City systems, it is beyond the scope of project to provide downstream improvements that are required solely as a result of changes in City runoff. The 1-405 team would be happy to include potential downstream facility issues as part of a discussion on culvert sizing and replacement needs. WSDOT and the City can discuss appropriate cost -sharing for these upgrades. 6. Agreed - The 1-405 Project Team will continue to work with the City staff to assure that these concerns are addressed. The STATE will be responsible for replacement costs of drainage structures that need to be relocated due to the proposed widening unless a pre- existing franchise or agreement says otherwise. Responsibility for costs to increase City drainage system capacity will be considered on a case by case basis. 7. This comment is consistent with the 1-405 Project Team approach. The approach will be to combine the new impervious area of the Nickel project to the impervious area of future projects to remove the "piecemealing" influence as we test for the 50% threshold. We are looking at this issue with the expectation that it would be better to make progress toward practicable retrofit on each project to avoid delaying the retrofit until it is triggered by the threshold. When applying the percent of new impervious area criteria, we include all new impervious area proposed by the project. This includes all WSDOT highway pavements (the northbound or southbound lanes improvements) and Renton Nickel Improvement Project Scoping Report r:\01456\task 6\scoping meetings\scoping _final 0401 AGENCy CommENTS 8. If retrofitting of existing storm systems to provide flow control and water quality treatment for existing and new impervious surfaces is not proposed, then WSDOT will need to investigate whether it is technically feasible to separate the storm system serving the existing impervious area with the new impervious area requiring water quality treatment. 9. As part of the Nickel Project, design the proposed stormwater facilities in such a way as to allow for expansion for ultimate 1-405 improvements. 1405 Northbound This portion of the project proposes to add a general- purpose lane northbound from approximately 400 west of the Burlington Northern Santa Fe/Union Pacific (BNSF/UP) railroad tracks to the SR 167 interchange. The City has the following concerns: There is an existing ditch that runs along the south side of 1-405. This ditch receives runoff from the north side of I- 405 that is conveyed through WSDOT right-of-way and receives direct runoff from 1-405. Expansion of the roadway to the south will require the conveyance capacity of the ditch be analyzed by WSDOT to determine if improvements are needed. These improvements may include the widening of the ditch and/or a new pipe system down to the outfall to Springbrook Creek. The project will need to maintain the existing drainage patterns and ensure that tributary areas outside of WSDOT right-of-way have acceptable drainage and are not adversely impacted by the project. 1-405 Souhbound This section of the project proposes to add two general- purpose lanes on the north side of the freeway between the SR 167 interchange and Benson Road and a single general-purpose lane from Benson Road to approximately 500 feet south of the Maple Valley Highway (SR-169). In addition, Benson Road could potentially be realigned between Sam's Club and approximately 1,000 feet north of 1-405. The Benson Road overpass will be widened for future expansion of 1-405 under the ultimate project. The City's concerns are as follows: 1. Renton Village: Storm runoff generated from the additional two lanes is proposed to discharge to a stormwater facility which is tributary to Rolling Hills Creek. However, prior to discharging into Rolling Hills Creek, the facility will discharge into a flume behind Sam's Club, and then into a culvert across Talbot Road and into the storm system that serves the Renton Village Shopping Center. Portions of this storm system are undersized resulting in flooding of the parking area behind the Shopping Center and adjacent to Rolling Hills Creek. Additionally, Rolling Hills Creek is tributary to two large sub -basins that cross 1-405 from the south, the Thunder Hills Creek sub -basin and the North Talbot Hills sub -basin. Consequently, any proposed project discharge upstream of Rolling Hills Creek must be analyzed for potential downstream impacts. Renton Nickel Improvement Project Scoping Report r:\01456\task 6\scoping meetings\swping _final 0401 8. The design will follow the WSDOT Highway Runoff Manual, which allows collection and treatment of an "equivalent area." The manual defines an equivalent area as an existing impervious surface area for which stormwater runoff treatment and flow control can be provided in place of treatment and flow control for an area of new impervious surface. "Equivalent" means equal in size, located in the same drainage basin (threshold discharge area), and having similar use characteristics (for example, similar average daily traffic) to the new impervious surface." 9. In Renton, future highway reconstruction is considerable. The 1-405 Team is developing stormwater conceptual pond design for the future construction packages. Pond designs for the Renton Nickel Improvement Project will accommodate the future designs wherever possible. This request is consistent with the WSDOT Highway Runoff Manual requirements that we are following. The 1-405 Project Team will continue to work with the City staff to assure that these concerns are addressed. The WSDOT Highway Runoff Manual requires that flow control look at both the frequency of peak flows and the duration of peak flows from the highway corridor. By using this approach, the design can mitigate potential effects on the downstream systems for flow frequencies between 50% of the 2-year and the 50-year recurrence interval. In prior meetings with the City staff, we have agreed to additionally mitigate any potential impact during the 100-year event where practicable. 47 AGENCY COMMENTS 2. Downstream System: Flows from Rolling Hills Creek discharge into two culverts under the 1-405 interchange before recombining and entering the Panther Creek Wetlands on the southeast corner of the interchange. Flows continue west in a culvert across SR 167 and enter into a pipe system on East Valley Road and SW 19th Street before outfalling to Springbrook Creek. This entire downstream system will require hydraulic analysis to determine any potential conveyance problems. These pipe systems/culverts may require upgrades to eliminate potential flooding as a result of the Nickel Project improvements. SR 167 Southbound WSDOT proposes to add one general-purpose lane on the west side of the freeway from the 1-405/SR 167 interchange to SW 41 st Street. The City's concerns are as follows: 1. The runoff from the additional lane will discharge into an existing ditch that runs along the west side of the freeway. The ditch receives runoff from the backside of businesses along East Valley Road (EVR) and from SR 167 and conveys this runoff north to the SW 23rd Street drainage channel. The current proposal shows a proposed stormwater facility to be located in an undeveloped parcel between EVR and SR 167. If WSDOT plans to discharge to the ditch, a drainage capacity analysis must be performed to show the ditch can convey all tributary flows without creating flooding impacts to adjacent properties. Another alternative WSDOT may want to consider is to discharge runoff from the SR 167 improvements into the storm system on East Valley Road, which from a hydraulics standpoint, may be the only option. WSDOT would need to investigate the East Valley Road storm system capacity to see if improvements are warranted. 2. The existing ditch also provides storage and helps to attenuate runoff from adjacent parcels. This natural storage must be maintained or compensated for at another location within the same drainage system. 3. Capacity analysis will be required for the SW 23rd Street Drainage Channel due to the increase in runoff from the project. This channel receives runoff form a large tributary basin, which includes Panther Creek, on the east side of SR 167. The channel runs adjacent to a large wetland on the south side between East Valley Road and Lind Avenue SW. 4. On the southern limit of the SR 167 improvements, flows from Panther Creek on the east side of the freeway become divided. Some of Panther Creek crosses SR 167 in a culvert which discharges into an open channel on the west side of the freeway and then into the storm system on East Valley Road which continues down SW 34th Street before outfalling to Springbrook Creek. The proposed additional lane will require that the culvert be extended to the west into the open channel. A hydraulic analysis will be required to determine the impacts of extending the culvert, as well as a capacity analysis to determine if the runoff from the project will require improvements to the channel and/or storm system in East Valley Road. To potentially minimize downstream impacts in this area, the City would like WSDOT to consider the possibility of redirecting Panther Creek flows into the Panther Creek Wetlands and allow it to flow to the north and 48 2. By providing the WSDOT Highway Runoff Manual required level of flow control, affects on the downstream system are not expected. See response to general stormwater comment #5 above for more detail. 1. This comment is consistent with the WSDOT Highway Runoff Manual requirements which we are following. Most likely we will mitigate changes in flow and discharge along the existing flow path as required to maintain existing wetland hydrology. WSDOT will continue to work with the City staff to identify the best discharge alternative. 2. Agreed — We will investigate this issue. 3. By providing the WSDOT Highway Runoff Manual required level of flow control, the project methodology assures that there will not be an impact on the downstream system. 4. The widening will be accomplished with retaining walls. We will evaluate the need for culvert extensions once we have the survey data. WSDOT is considering changes to the Panther Creek channel and wetland system on the east side of SR-167 as part of a future project. The permitting process is expected to take longer than the schedule would allow for it to be included in the Nickel Project. WSDOT will continue to work with the City staff to identify the best design considering flooding issues and the need to avoid impacts to wetland hydrology downstream of this culvert. Renton Nickel Improvement Project Scoping Report rA01456\task 6\scoping meetings\scoping _final 0401 AGENCY COMMENTS into the SW 23rd Street Channel. This concept was identified by the City as a way to reduce flooding in the East Valley Road storm system and to increase wetland function. The resulting increase in flow in the wetland would provide additional water recharge for migratory fish that use the wetlands for rearing and refuge. WETLANDS: General Comments At a minimum, the project should be held to a "no net loss" of wetland area, function, and value. Replacement ratios for wetland mitigation should satisfy Renton's wetland replacement ratios for wetland impacts in Renton. The Department of Ecology or the Army Corps of Engineers' replacement ratios should be acceptable if they are equal to, or more stringent, than Renton's. Wetland mitigation should be done in the same local drainage basin and as close as possible to where the impact occurs. The City is working with WSDOT to develop the Springbrook Creek Wetland and Habitat Mitigation Bank that, if approved and implemented, could be used as a mitigation site for the Renton Nickel Project impacts. 1-405 Northbound There may be wetlands along 1-405 Northbound between Springbrook Creek and SR 167. Wetland investigation and delineations should be conducted in this area to determine if the project improvements will result in any impacts to the wetlands. 1405 Southbound No comments at this time. SR 167 Southbound The west side ditch may contain wetlands. Wetland delineation will be required to determine class and function so appropriate mitigation can be applied for any wetland impacts resulting from the filling for the additional lane. STREAM BUFFERS/FISH HABITAT: General Comments 1. The project should provide mitigation to provide for "no net losses" of stream buffer area, function, and value. In addition, the project's impacts to fish habitat (spawning, rearing, and passage) should be held to the same standard. Replacement ratios (2:1) for impacts to stream buffers and fish habitats should be required. 2. Mitigation should be incorporated at the location of the impact to the maximum degree possible, but the additional mitigation could be done offsite within the same drainage basin within Renton. A mitigation fund could be established for acquisition, restoration, or enhancement of stream buffer and/or prime fish habitat sites that have been determined to be beneficial to improving salmon habitat within Renton. 3. The project should not only mitigate for the action impacts but should have a restoration element to offset prior impacts and the fact that mitigation benefits are not immediately achieved, especially when it comes to stream buffers. Any existing culverts or other stream crossing structures that are barriers or restrictions to Renton Nickel Improvement Project Scoping Report rA0145Mtask ftcoping meetings\sooping _final 0401 1. WSDOT's current wetland policy does implement a "no net loss" approach, and WSDOT will meet or exceed the City of Renton's wetland replacement ratios. 2. WSDOT looks forward to working with the City to develop the Springbrook Habitat and Wetland Mitigation Bank and agrees that mitigation should occur within the same local drainage basin whenever practical. WSDOT will identify existing wetlands in the EA and any associated effects from the project. WSDOT will identify existing wetlands in the EA and any associated effects from the project. In addition to the Wetland discipline report for the FA, a Wetland Biology Report will be prepared for permitting purposes and any other appropriate regulatory requirements. 1. 1-405 Team staff will document effects to stream buffers, functions, and values and fish habitat resulting from the project. Once the effects of the project have been determined, a compensatory mitigation plan will be prepared to address the effects. The mitigation plan will need to be approved by applicable permitting agencies. 2. Mitigation for the project effects has not yet been established, as the ultimate effects of the project have not been determined. Once the effects of the project have been determined, a compensatory mitigation plan will be prepared to address the effects. This mitigation plan may include both on and off -site mitigation opportunities. 3. Mitigation will be performed to offset effects from the project. Fish passage barriers within the project limits are being documented and will be evaluated for replacement where appropriate. 49 AGENCY COMMENTS fish passage should be replaced with new structures that don't prevent or restrict fish passage. 4. WSDOT will need to comply with the City's proposed new stream buffer standards that are currently being adopted and the City's Shoreline Master Program regulations for the Cedar River and Springbrook Creek. 1405 Northbound Impacts to the riparian habitat of Springbrook Creek, as a result of widening the 1-405 box culvert, must be mitigated. 1-405 Southbound Thunder Hills Creek and Rolling Hills Creek may be impacted by the proposed improvements. SR 167 Southbound Any improvements to the SW 23rd Street Channel will need to include mitigation for riparian wetland and habitat. Because of the direct connection of the channel with Springbrook Creek, salmonid species have the opportunity to use the channel to migrate from Springbrook Creek to the Panther Creek Wetlands. FLOODPLAIN: General Comments 1. The project should be required to provide compensatory storage for filling of any floodplain. A "zero rise" to the floodway standard should be applied to the project. 2. The project is also required to comply with all FEMA and National Flood Insurance Program (NFIP) standards, since Federal funding will be used. No encroachment into the floodplain should be allowed unless a hydraulic analysis can demonstrate that the zero rise standard can be achieved. The hydraulic analysis should be based upon future land use condition 100-year flood flows. 1405 Northbound 1. Adding the extra lane will also require the widening of the 1-405 bridge over Springbrook Creek. WSDOT will need to show that any required structures such as bridge piers, columns or abutments will not result in an increase in the 100-year water surface elevation of the Creek. Also, that adequate clearance between the 100-year water surface elevation and the lowest bridge cord is provided. 2. Any filling in the 100-year floodplain will require compensatory storage. This project must mitigate for the loss of floodplain storage due to filling of the floodplain by removing an equivalent volume of compensatory storage. Compensatory storage determination shall be based on filling up to the City's modeled 100-year flood elevation under future condition flows, which is 13.7 NGVD 29, revised future condition flows. 50 4. WSDOT will comply with any applicable City of Renton regulations when permitting this project. It is presently anticipated that the existing Springbrook Creek Culvert will not have to be extended under the Renton Nickel Improvement Project. Recent investigations have determined that the existing culvert is long enough to accommodate the proposed 12' widening of 1-405; however, the existing headwall may have to be modified. Potential effects to the existing stream and riparian habitat will be evaluated and mitigation proposals developed as the design develops. Widening planned under the Renton Nickel Improvement Project does not physically affect Thunder Hills or Rolling Hills Creeks. Potential effects to the existing stream buffers will be evaluated and mitigation proposals developed as the design develops. There are no anticipated effects to the SW 23rd Street channel as part of the Renton Nickel Improvement Project. However, should changes be made to the project design that would affect the SW 23rd Street channel, mitigation would be performed for those effects. 1. WSDOT will follow applicable FEMA floodplain requirements. 2. Comment noted. WSDOT will include applicable federal regulations for floodplain requirements as performance criteria for the final design. 1. This request is consistent with the WSDOT Bridge Manual requirements. 2. Understood. The channel excavation at the Early Environmental Investment site is expected to provide this compensatory storage, but this will be verified as the design continues. Renton Nickel Improvement Project Scoping Report rA014561task ftcoping meetingslswping _final 0401 AGENCY COMMENTS 1-405 Southbound The area near the 1-405 and SR 167 interchange on the Renton Village site is mapped as a 100-year FEMA Floodplain. If improvements occur in this area, mitigation for floodplain impacts will be required. SR 167 Southbound The area near the SW 23rd Street Channel where widening is proposed is mapped as a 100-year FEMA Floodplain. Floodplain impacts at this location will need to be analyzed and mitigation provided. SHORELINES: General Comments The project should comply with the currently adopted Washington State Department of Ecology Shoreline Management Guidelines and City adopted Master Shoreline Program regulations for the Cedar River and Springbrook Creek. 1-405 Northbound Springbrook Creek falls under shorelines of the State and the City of Renton's Master Shoreline Program regulations. FIRE AND EMERGENCY RESPONSE Liberty Park Emergency vehicle access to the Wells 1, 2 and 3 facility must be maintained both during and after construction. Benson Road Overpass Closure of the Benson Road during construction will impact emergency vehicle response to areas served by Stations 11, 13, and 14. An additional Fire Department Aid Car may need to be staffed to address this impact. The addition of opticom pass -card gates for emergency vehicle access options should also be considered. General Comments Intersection changes due to this project should result in emergency vehicles being able to travel in all directions when in emergency response mode and not be limited by physical barriers that may be present for normal traffic flow considerations. Emergency vehicle access options should include, but not be limited to, opticom pass -card gates at Grant Avenue and Beacon Way on Renton Hill to optimize emergency vehicle response times both during and after construction to affected areas. Please refer to the attached issue paper Renton Fire Department Response to Areas Affected by the Proposed Benson Road Closure for additional discussion regarding this issue. PARKS 1. Maintain bike accessibility with bike lanes along each side of Benson Road. Make bike lane connection to downtown area. 2. The Thunder Creek Trail connection under 1-405 to Benson Road needs to be evaluated with recommendations and accommodations made for trail connections and development. Renton Nickel Improvement Project Scoping Report r\01456\task 6\scoping meetings\scoping _final 0401 Understood. WSDOT will consult applicable ordinances for floodplain requirements. Understood. WSDOT will consult applicable ordinances for floodplain requirements. WSDOT will comply with all appropriate state and local regulatory requirements. Comment noted. WSDOT will comply with all appropriate local regulatory requirements. Existing emergency vehicle accesses to the Wells will be maintained at all times. The RFP documents will be written accordingly. Comment noted. The current proposal to re -align Benson Road should allow the Contractor to avoid total closures for extended periods. Any short-term closures to construct tie- ins, etc. could be designed to allow passage of emergency vehicles if necessary. It is not anticipated that there will be any intersection changes occurring with this project. If this changes, then this will be discussed with the City. 1. A 40' wide section is anticipated for the re -aligned length of Benson Road. The section will be comprised of a two- lane roadway with 5' bike lane / shoulders on both sides, and a sidewalk along the west side of the roadway only. The bike lane / shoulders will connect to the existing Benson Road shoulders at the limits of the re -alignment; however, there are no plans to extend the improvements beyond the reconstruction limits or to the downtown area. 2. through 11., WSDOT will address all effects on existing trails due to the Renton Nickel Improvement Project. WSDOT will work with the City of Renton to identify mitigation measures as appropriate. 51 AGENCY COMMENTS 3. Ensure the Burnett Trail has continued access under 1-405 from the north to the south with a connection to the Cascade Trail. 4. The Cascade Trail Follows Shattuck Avenue South to South 15th Street, crosses SR-515 (Benson Road) and ties into and follows Puget Drive. This trail route needs to be maintained. 5. A connection for the Oakesdale Avenue SW trail under 1-405 needs to be accommodated and maintained. 6. The existing Springbrook Trail under 1405 and along the entire Springbrook Creek needs to be maintained. 7. The SW 16th Trail with connections to the Oakesdale Trail, Springbrook Trail and the Christenson/Interurban trail needs to be maintained. 8. The Christenson and Interurban trails need to be maintained. 9. The Monster Road Trail connection under 1-405 needs to be maintained. 10. Pedestrian, bicycle, and vehicular access to Liberty Park, Cedar River Park, and Narco needs to be maintained. 11. The Cedar River Trail needs to be maintained. Previous Meetings The meeting records from the January 31, 2005, meeting accurately reflect comments by the City regarding the Renton Nickel Environmental Assessment Scoping. City Reviewers: Staff involved in reviewing the subject document project are: Sandra Meyer, Transportation Systems Director Nick Afzali, Transportation Planning and Programming Manager Keith Woolley, Civil Engineer, Transportation Systems Dan Hasty, Civil Engineer, Transportation Ron Straka, Surface Water Utility Supervisor Abdoul Gafour, Utility Engineering Supervisor Leslie Betlach, Parks Director Stanley Engler, Fire Marshall Peter Renner, Facilities Director 52 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 See response previous page for question 2 WSDOT has provided answers to the January 31 comments in this scoping report. Renton Nickel Improvement Project Scoping Report r.\01456\task 6%scoping meetings\scoping _final 0401 POTENTIAL EFFECTS How were the effects of the Renton Nickel Improvement Project determined? Using the existing conditions we identified in the previous section, we evaluated how the Build Alternative and the No Build Alternative will affect public services and utilities within the study area. To determine potential effects on public services during construction, the 1-405 Team considered traffic What are temporary effects? detours and delays that could occur during construction. Although these effects are temporary, Temporary effects on public service occur during construction and generally they can interfere with the freeway and local street relate to changes in traffic patterns due system and disrupt emergency service response to detours and delays. The severity of times. These temporary effects can last as long as temporary effects depends on: construction is active in a specific area and typically ■ how long construction lasts do not have a long-term effect. To characterize these (duration), effects, the 1-405 Team reviewed the construction ■ whether construction is constant or staging plans and determined the duration, intensity, sporadic (intensity), and and location of construction activities relative to the ■ the need for detour routes. existing service routes. Temporary effects on utilities generally To determine potential effects on public services relate to the need to extend protective during operation, the 1-405 Team reviewed the casings or move (relocate) the utility. Transportation Discipline Report prepared for this What are permanent effects? project. The 1-405 Team's transportation group Permanent effects are those that change coordinated with us to provide an accurate how public services and utilities serve understanding of how traffic patterns and mobility the study area. The severity of these effects depends on: might change as a result of the project. We used this information to determine whether increased ■ whether new spans are too wide for overhead cables, accessibility and better traffic flow will affect existing ■ subsurface maintenance is no longer services. possible due to newly built In particular, we looked at the project's effects on 2030 structures, levels of service (how well traffic flows through key ■ how well traffic flows through key local intersections and on the freeway). These future intersections, and levels of service reflected the morning and afternoon ■ whether the project has a positive or peak hours. These levels served as reference points negative effect on emergency to determine whether the project will affect (either response times and travel times to positively and negatively) response times for access public Services. emergency vehicles and travel times for school buses and people accessing other public services, such as medical clinics. To determine potential effects on utilities, we reviewed the base maps with utility locations and then compared those locations with the proposed project footprint. The 1-405 Team noted and described each Renton Nickel Improvement Project Public Services and Utilities Discipline Report 33 POTENTIAL EFFECTS potential conflict by type, quantity, and possible solution (i.e., to protect or relocate). As part of the design process, the 1-405 Team evaluated ways to avoid potential conflicts and incorporated them into the design where feasible. A goal of this project is to avoid disruption of services. For this reason, WSDOT intends to relocate utilities prior to construction. This will also help maintain the construction schedule by avoiding potential delays associated with relocating the utilities. What effect will construction activities have on the public services and utilities in the study area? How long will It take to construct the project? Construction is expected to take two years; however, construction activity in any one location could take substantially less time. Construction will pose some minor inconveniences because of localized travel delays due to temporary lane closures. Typical equipment used on roadway construction projects The Renton Nickel Improvement Project will widen the roadway, widen or replace 1-405 bridges, relocate or protect utilities, install storm drainage facilities, and reconstruct and realign the Benson Road overpass. These activities will have minor short-term effects on public services and utilities in the study area. Travelers through the area can expect minor delays and slow downs. Transit, school buses, solid waste collection and recycling, and emergency response vehicles may also experience temporary route detours during some construction phases. To minimize effects on traffic, the duration of activities will be minimized and reductions in capacity will be targeted to a period when they will have the least effect. WSDOT will also comply with safety standards and work to minimize effects on road capacity during construction. Construction staging Construction staging will minimize traffic delays and detours that affect delivery of public services. For at -grade construction (work occurring at same elevation as existing road), it is likely that the 1-405 and SR 167 lanes will be shifted toward the median. Next, a concrete barrier will be laid down to close off the existing shoulder so that construction can occur safely without closing lanes. The 1-405 bridge construction will occur in multiple stages. As a first stage, traffic will be diverted away from the construction area and the existing lanes and shoulders will be narrowed to allow either widening of the existing structure or construction of the new bridge. 34 Renton Nickel Improvement Project Public Services and Utilities Discipline Report POTENTIAL EFFECTS Construction -related effects will occur when the Benson Road overpass is realigned. Overhead power lines and a water line will need to be relocated in this area. Overall, construction at this location is expected to take about 9 months. How are utilities protected in place? Underground utilities are protected by concrete encasements, sleeves, or slabs. This type of protection ensures that roadways or other structures placed on top of them will not collapse the pipe. It also protects the roadway or structure against collapse and wash out should a pipe break or start to leak. For replacements, the old structure will be demolished after traffic is shifted to the new bridge area. The new Benson Road overpass will also be staged. The new structure will be built to the west, so that the existing overpass can remain in service. After traffic has been shifted onto the new overpass, the existing structure will be demolished. The Benson Road overpass replacement is expected to require a substantial amount of fill material. Approximately 100 additional trucks will pass over the City of Renton's streets each weekday to deliver this material. The traffic disruptions on Benson Road are expected to be limited to this additional truck traffic and a short-term road closure when traffic is shifted from the old bridge to the new bridge. The realignment of Benson Road will leave a segment of unused abandoned roadway in front of existing residences. This unused roadway will be reconfigured as a frontage road to provide local access to the adjacent residences. No other local roads are expected to be substantially affected by construction. Utility relocations Based on WSDOT's Utility and Franchise Permit database, field observations, and coordination with utility providers, the 1-405 Team identified a substantial number of utilities within the study area. Many of these utilities cross over and under 1-405 and SR 167 and a number of telephone and traffic signal cables and a water line are attached to the underside of the Lind Avenue, Christensen Road, and 61stAvenue bridges. Many of these utilities will be affected by the project. Investigations are underway in consultation with the utility owners and agencies to determine the extent and nature of the possible effects and to develop strategies for relocating and/or protecting the existing utilities, if required. The protection method will be evaluated by the utility owner in coordination with the 1-405 Team to ensure that it is sound, acceptable and complies with codes and industrial practices. This will be documented and filed in WSDOT records as reference for any future roadway improvements. The 1-405 Team expects most utilities already have adequate protection. A few utilities may require their protective casings to be extended and some may Renton Nickel Improvement Project Public Services and Utilities Discipline Report W POTENTIAL EFFECTS How are utilities relocated so that service Is not disrupted? When utilities are relocated, the move is staged so that no major disruption in service occurs. Usually, the existing line is kept in place and in service while the new line is being laid. Once the new line is in place, it is tested, treated, and connected to the existing service. The shift from the existing line to the new line usually occurs during off-peak hours (when there are the fewest users). How are utilities being coordinated? The project team is currently working with the utility providers to verify all existing utilities in the study area and to provide a strategy to assure that the relocations are done efficiently and in a timely manner. Utilities will be relocated under the provisions provided in each provider's franchise agreement. The project team will determine the best timing for relocations through communications with the utility provider and with WSDOT. The 1-405 Team will draft a memorandum to define the approach for relocating utilities. The memorandum identifies three possible approaches: ■ Relocate utilities prior to awarding the design -build contract. ■ Begin the relocation process before selecting the contractor and then assign responsibility to the contractor to identify any remaining utilities. ■ Give the successful contractor the full responsibility to coordinate all utility relocations. The project team has future meetings scheduled with the various providers to confirm existing utility locations, as well as to refine the team's approach for relocating utilities. need to be relocated. Relocating utility lines and/or cables will cause temporary outages. These outages are anticipated to be short term, intermittent, and coordinated with services providers to ensure that inconveniences to the public are minimized. The 1-405 Team has currently identified many potential utility conflicts within the Renton Nickel Improvement Project footprint. Of the potential conflicts, a small number are identified as having a probable conflict that will most likely result in relocation of utilities. The exact location and depth of the more critical utilities like petroleum, major water, and major sewer lines are currently being verified with utility providers. The potential utility conflicts that have been identified are summarized in Exhibits 12 through 15 and discussed below. These probable utility conflicts will be resolved prior to construction. Electric power The 1-405 Team has identified a number of potential conflicts with overhead power transmission lines that enter the 1-405 right-of-way; several lines may need to be relocated. These lines cross over Benson Road and their height may need to be increased to provide adequate clearance for the new roadway. WSDOT may also have to relocate the tower associated with the step-down transformer south of 1-405 and east of Longacres Drive. Natural gas The 1-405 Team has identified a number of natural gas lines, all owned by PSE, that have probable conflicts. Field investigations are ongoing to confirm whether the existing protective casings are long enough to accommodate roadway widening or if these casings will need to be extended. The 1-405 Team does not anticipate needing to relocate these utilities. Phone/cable The 1-405 Team has identified many lines that have probable conflicts. The buried phone lines near the BNSF railroad tracks may require some minor shifts, but the 1-405 Team anticipates that these shifts could occur without major disruption of service as long as the lines have enough slack for adjustment. Renton Nickel Improvement Project 36 Public Services and Utilities Discipline Report POTENTIAL EFFECTS em s +sxa sr a„p mgds sisae si c.,,r, fey r ey �GN <y. 101... s a 125 � E SOu ,� o4�ro 195 s 111 408 siren v u e r ... T4,M. Pk, S E 410 8 SO41C.nbr M&1 AHt a s Wey ....eveID Utility Utility Type Utility Owner F a City m of Tukwila Exhibit 12. Approximate Location of Utilities with Potential Conflicts (1-5 to SR 181) Exhibit 13. Approximate Location of Utilities with Potential Conflicts (SR 181 to SR 167) Renton Nickel Improvement Project Public Services and Utilities Discipline Report 37 POTENTIAL EFFECTS Exhibit 14. Approximate Location of Utilities with Potential Conflicts (SR 167 to Renton Avenue S) 30 u.t •4 js=t.st sw=NttW � 330 331 4115 406 p7 ID Utility Type Ownerutility Utility $ sag• 330 I ele hone Electric Li htwave 331 Power PSE 349 Water Cityof Seattle 1k 350 Oil Olympic Petroleum 354 Power Olympic Petroleum 355 Water Cityof Renton 405 Power PSE 406 Power PSE a s 407 Power PSE 167 m W Tn g 1 Exhibit 15. Approximate Location of Utilities with Potential Conflicts (SW 19th Street to SW 41 st Street) Renton Nickel Improvement Project 38 Public Services and Utilities Discipline Report POTENTIAL EFFECTS A typical utility trench within a roadway's right-of-way Tukwila and Renton water systems Widening of northbound 1-405 will encroach on the 60- inch City of Seattle water line that provides water for Tukwila within the study area and will reduce the clearance to the line. The water line will be protected by installing a protective lining around the pipe. A fill slope will then be used along the highway edge that will also future access to the pipe for repairs and maintenance. The 1-405 Team has identified other water lines that have probable conflicts. One City of Renton water line near the Benson Road construction area is expected to be relocated. This relocation will be staged so that no major service disruption occurs. In addition, the City's fire protection system in Benson Road will remain in place until the new system is energized. A 60-inch City of Seattle water main crosses SR 167 at approximately SW 23rd Street. The 1-405 Team is currently field verifying this line location and evaluating its existing protection. The City of Renton wells located at the north end of the project will not be affected as the roadway will not be widened in the vicinity of the wells. WSDOT will restripe the existing pavement in this area to add the auxiliary lane. Sewer system The 1-405 Team has identified several potential sanitary sewer line conflicts in the study area; however, these lines are not anticipated to need relocation. One line, a 90-inch sewer line near Springbrook Creek, will require special design considerations. The 1-405 Team is currently evaluating the bridge design around this line. The goal is to position the new bridge piers to avoid the line. The 1-405 Team will develop performance standards for construction methods to protect the pipes based on the sewer line's age, location, and composition. Storm sewer Generally, the project will have minimal effects on the storm sewer systems in the study area. Existing drainage structures and systems will be retained in places where they will not be disturbed by new construction. See the Surface Water and Water Quality Discipline Report for details. The proposed systems along the project corridor will include standard WSDOT catch basin and manhole structures connected by lateral and trunk drains to the Renton Nickel Improvement Project Public Services and Utilities Discipline Report 39 POTENTIAL EFFECTS treatment and detention facilities. Pipe sizes will generally range from 12 to 30 inches in diameter and will be installed on grades and at depths necessary for proper vertical clearances and hydraulic performance. New storm sewer lines will tie into the existing lines or will flow directly into treatment facilities. Where space and access to structures make it possible, ecology embankments will be constructed to provide enhanced treatment of the runoff (see the section Introduction, Build Alternative, for a description of proposed water quality treatment and detention facilities). Oil Two Olympic Petroleum pipelines cross the study area. A 20-inch pipeline crosses under Benson Road and under SR 167 at SW 23rd Street. A 16-inch pipe crosses under 1-405 at Raymond Avenue SW and under SR 167 at SW 23rd Street. Based on location of the vents for these pipes, the 1-405 Team suspects that the protective sleeve extends out to a distance that will accommodate the road widening. These lines are not expected to be affected by the project. What effect will an improved transportation system have? WSDOT expects an increase in average travel speeds of up to 20 mph along 1-405 when the project opens in 2010. The project will also increase the number of vehicles that can travel through the corridor over the No Build Alternative. The project will enhance mobility and reduce response times for fire and emergency medical service vehicles along 1-405 and SR 167. WSDOT does not expect the increases in speed and capacity to be substantial enough to affect traffic patterns or conditions on local streets. The transportation analysis does not indicate that improvements will affect how traffic operates on local streets. Emergency services will experience essentially the same conditions on local streets with or without the project. How would the No Build Alternative affect public services and utilities in the study area? WSDOT expects that traffic volumes would continue to increase and congestion would continue to be a problem on 1-405 and SR 167 without the project. The worsening traffic conditions could increase response Renton Nickel Improvement Project 40 Public Services and Utilities Discipline Report POTENTIAL EFFECTS times for emergency services and thus affect their level of service on 1-405. Will there be any indirect effects from the project? What are Indirect Effects? Indirect effects are defined in the WSDOT Environmental Procedures Manual as the "effect caused by the proposed action that is later in time or farther removed in distance, but still reasonably foreseeable. Indirect effects may include growth -inducing effects and other effects related to induced changes in the pattern of land use, population density or growth rate, and related effects on air and water and other natural systems, including ecosystems." Were cumulative effects looked at for this discipline? The team did not evaluate cumulative effects for this discipline report. A report of cumulative effects is not needed for every discipline studied for NEPA and SEPA documentation. The disciplines that were studied for cumulative effects are Air Quality, Surface Water and Water Quality, Fisheries and Aquatic Resources, and Wetlands. The cumulative effects for these disciplines are presented in the Cumulative Effects Analysis Discipline Report. The transportation model is based on local and regional economic and land use plans. The model projects that a similar level of traffic growth will occur in the study area, with or without the project. Based on these findings, the project will not increase demand for public services or utilities within the study area. The Land Use Patterns Discipline Report provides additional details on indirect effects. Renton Nickel Improvement Project Public Services and Utilities Discipline Report 41 MEASURES TO AVOID OR MINIMIZE PROJECT EFFECTS How will adverse effects from construction be avoided or minimized? Impacts to existing utilities will be avoided through project design when it is feasible. Where avoidance is not feasible, utilities will be relocated or protected in place. WSDOT will coordinate several efforts with the contractor prior to and during construction of the project. These efforts will ensure that: ■ The contractor will prepare and implement a Traffic Management Plan (TMP). Signs will be posted to show detour routes if periods of closure are needed, or if traffic is required to change its normal route. ■ Coordination with the service providers will occur before construction. The TMP will be implemented and coordinated with all service providers prior to construction activity. ■ Coordination with utility service providers will identify conflicts and resolve them prior to or during construction. In addition, WSDOT expects to meet the commitments in their 1-405 Corridor Program FEIS. Construction scheduling and staging plans will be developed to ensure that emergency and school transportation access is maintained. If temporary disruptions in service are unavoidable, emergency and school transportation service providers will be contacted and kept informed. Contingency plans for unforeseen interruptions of access or services will be developed before construction begins. Renton Nickel Improvement Project 42 Public Services and Utilities Discipline Report MEASURES TO AVOID OR MINIMIZE PROJECT EFFECTS How will adverse effects from an improved transportation system be avoided or minimized? This project has been planned in accordance with local, state, and federal planning documents. There will be no adverse effects from improving the transportation system. Renton Nickel Improvement Project Public Services and Utilities Discipline Report 43 1 Carrie Olson - Tukwila to Renton Improvment Project Phase II Page 1 From: Allen Quynn To: Olson, Carrie Date: 06/05/2006 11:46:49 AM Subject: Tukwila to Renton Improvment Project Phase II Carrie: Please create a project file labeled "Tukwila to Renton Improvement Project Phase II". This file already exists under the file name "South Renton Project' and file number "SWP-27-3205". A 4" folder labeled "general Correspondence" would be great. If there is any other information you need please call me at ext. 7247. Thanks, Allen CD CD e-r 0 0 v, 0 O CT CD CD 7�7 r� V) Yl O 0 o� ° n C b C� � � n n " CD CD ' ®� Zg a A CD 'a O A.•�a. r1 CD CD CD 0 k y=1 v (p COD CD � cD CDCD CD A' r�qq AtCD a 'CY CD C� CD C� =3 d 0 cn � ' C Cc 5- CD d CD CIQ p� d (/�' ►�7 a o � CD CD r. 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