Honorable City Council i. A / Richard A. Leahy, City Manager \~v Thomas E. Hansen, P.E., Public Works Director/ ;?:?-

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1 ----r 1: I To: From: By: Subject: CITY OF WOODINVILLE, WA REPORT TO THE CITY COUNCIL rd Avenue NE, Woodinville, WA Honorable City Council i. A / Richard A. Leahy, City Manager \~v Thomas E. Hansen, P.E., Public Works Director/ ;?:?- Date: 01/21/2014 WSDOT Presentation about Impacts of Little Bear Creek Culvert Replacement FINANCIAL ACTION SUMMARY Expenditure Required Amount Budgeted/Approved Additional Amount Required $0 $0 ISSUE: Shall the City Council receive a presentation from the Washington State Department of Transportation (WSDOT) concerning the construction options and the traffic control impacts for the Little Bear Creek Culvert Replacement Project? RECOMMENDATION: To receive the presentation and provide comments and feed back to WSDOT staff. BACKGROUND/DISCUSSION: WSDOT is designing a project to replace the existing box culvert under SR 202 ( 131 st Avenue NE) for Little Bear Creek. The existing culvert does not meet current installation guidelines for culverts on fish migratory streams. It restricts the free passage of salmon and other species that try to reach the upper sections of Little Bear Creek. They are under federal court order to replace this culvert and 800 others throughout the state. On Tuesday night, WSDOT staff will give a presentation on the options considered in replacing this box culvert and the traffic impacts of each option. WSDOT is planning to start construction of this project in ALTERNATIVES: 1. To receive the presentation and provide comments to WSDOT about proposed traffic control and detours for the Little bear Creek Culvert Replacement Project. 2. Request additional information. RECOMMENDED MOTION: NO MOTION REQUIRED. 1

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3 Hung Huynh Project Engineer Lynn Peterson Secretary of Transportation Cathy George Engineering Manager City Council Briefing Woodinville City Hall January 21 st, 2014

4 RCW requires unrestricted fish passage at all stream crossings U.S. District Court permanent injunction No. C requires WSDOT to restore fish passage at more than 800 culverts (this location included) in western Washington by 2030 Rank #3 statewide for fish passage restoration Flow exceeds maximum design velocity for trout Replace existing 10 wide opening with a 30 wide opening. 2

5 Main Access to City 38,000 vehicles each day Dream Auto Dairy Queen Culvert 3,500 vehicles during PM peak hour Emergency responders McLendon Underground utilities Picture from Bing.com. 3

6 Little Bear Creek is approximately 30 below SR 202 SR 202 SR 202 Downstream of culvert looking at SR 202 Upstream of culvert looking at SR 202 4

7 Constraints Minimize impact to the community during construction All work in the creek must occur between July 1 st and September 30 th Keep costs within budget 5

8 Options 1. Culvert - replace existing culvert with a larger culvert 2. Bridge - replace existing culvert with a bridge 3. Tunnel - replace existing culvert with a tunnel 6

9 Culvert Option Dream Auto Dairy Queen Culvert 10,300 CY hole = 1,015 truck & pup 7

10 Little Bear Creek is approximately 30 below SR 202 SR 202 SR 202 Downstream of culvert looking at SR 202 Upstream of culvert looking at SR 202 8

11 Culvert Option Close SR 202 for a month Dream Auto Dairy Queen Culvert Not Desirable 10,300 CY hole = 1,015 truck & pup 9

12 Bridge Option Dream Auto Dairy Queen Culvert Edge of Dairy Queen Parking Lot/Driveway Existing Culvert 10

13 Roadway to be constructed during weekend closure Bridge Option Close SR 202 for 2 weekends Precast deck slabs to be installed during Better weekend closure Shaft caps to be installed at night Secant walls to be installed at night 11

14 Tunnel Option Not suitable for site conditions Existing sandy soils present unacceptable risks Not Not Recommended enough space at either end to perform the installation without significant environmental impacts Twice the cost of the bridge option 12

15 Options Comparison Culvert Bridge Tunnel Road Closure 1 month 2 weekends None Night time Lane Closure Intermittent 10 months intermittent Cost $6M $8M $15M Constructability risks Acceptable Acceptable Not Acceptable 13

16 Selected Option Replace existing culvert with a bridge in order to minimize impact to the community during construction Construction from Summer 2015 through Fall 2016 Night time work from Summer 2015 to Summer 2016 Two (2) weekend closures in May or June 2016 Daytime off road work Summer and Fall

17 Moving Forward Brief City Council Meet with the business community Meet with the affected property owners and businesses Public information campaign leading up to the weekend closures Continue to work with city staff to minimize construction impacts 15

18 Dream Auto Dairy Queen Culvert McLendon Picture from Bing.com. 16