Title
AUTHORIZATION TO ENTER INTO AMENDMENT NO. 1 TO THE PROFESSIONAL SERVICES AGREEMENT WITH AECOM TECHNICAL SERVICES, INC., FOR DESIGN SERVICES FOR OLIVE AND 59TH AVENUE INTERSECTION CAPACITY IMPROVEMENTS
Staff Contact: Jack Friedline, Director, Public Works
Purpose and Recommended Action
This is a request for City Council to authorize the City Manager to enter into Amendment No. 1 to the Professional Services Agreement (PSA) with AECOM Technical Services, Inc. (AECOM), Contract No. C-10789, for an increase of $53,728.63, and to authorize a contingency in the amount of $25,000, for a total contract not to exceed amount of $474,355.04, for design services for Olive and 59th Avenue intersection capacity improvements.
Background
The intersection of 59th and Olive avenues is one of the busiest intersections in the City of Glendale, serving about 53,200 vehicles per day. Based on a thorough evaluation of safety and traffic geometry as well as demand, both capacity and safety enhancements are warranted at this location. Improvements will be constructed in two phases (capacity and safety) due to constraints as a result of using federal funds for the safety improvements portion of the project.
Capacity enhancements identified to improve the flow of traffic through the intersection include north- and southbound bus bays on 59th Avenue and east- and westbound right-turn lanes on Olive Avenue. Each of these elements is included in the capacity portion of the project.
In April 2016, the city entered into a PSA with AECOM, Contract No. C-10789, to provide design services for Olive and 59th Avenue intersection improvements.
Analysis
During design, Salt River Project (SRP) notified the city and AECOM that an existing SRP irrigation pipe along the south side of Olive Avenue and the west side of 59th Avenue would require an upgrade as part of the capacity improvements. This upgrade was not part of the original PSA with AECOM and would require additional design work and coo...
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