MEMO TO: Members of the City Council
FROM: Mayor John Marchione
SUBJECT:
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Acceptance of Construction for the SR 520 NE 40th and 51st Street Eastbound Collector-Distributor Ramp Modification with McCann Construction Enterprises, Inc. of Renton, Washington, and Approval of Final Contract in the Amount of $1,080,925.03, Project No. 20021605
I. RECOMMENDED ACTION
recommendation
Approve the final contract amount with McCann Construction Enterprises, Inc. of Renton, Washington, for the base bid amount of $1,154,791.00, plus or minus change orders and bid items increases or decreases, resulting in a final contract amount of $1,080,925.03, and accept construction of SR 520 NE 40th and 51st Street Eastbound Collector-Distributor Ramp Modification, Project No. 20021605, as of December 3, 2019.
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II. DEPARTMENT CONTACTS
Dave Juarez, Director of Public Works 425-556-2733
Gary Schimek, Interim City Engineer 425-556-2742
John Mork, Project Manager 425-556-2713
III. DESCRIPTION/BACKGROUND
Project Purpose
The purpose of this project was to improve safety and reduce congestion by splitting the Eastbound SR 520 combined exit ramp at 40th and 51st Streets into two separate off ramps. This project reduced queuing on the SR 520 mainline, particularly during AM peak hours.
Project Description
A portion of the existing concrete barriers between the Eastbound 520 mainline and the 40th Street/51st Street Collector-Distributor (C-D) was removed and replaced with a new 51st Street exit. Work also included revisions to channelization, signage, and storm drainage.
Background
Ramp Split
The Eastbound SR 520 40th/51st ramp split concept is similar to the Westbound SR 520 40th/51st ramp split that was completed in 2015. That project successfully reduced congestion compared to the original combined ramp exit.
WSDOT and Redmond staff modeled implementation of a similar project to split the Eastbound 520 40th/51st combined ramp exit and fo...
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