Title
Staff Report for a Resolution Approving a Consulting Services Agreement with Cal Engineering and Geology for the Lake Chabot Road Stabilization, Project 2009.0030
Staffreport
SUMMARY AND RECOMMENDATIONS
Staff recommends approval of an agreement with Cal Engineering and Geology for design of improvements to stabilize Lake Chabot Road for $205,458.00 with maximum change orders of $41,092.00, totaling $246,550.00.
BACKGROUND
Lake Chabot Road is a two-lane collector that runs east to west above San Leandro Creek near Lake Chabot. Approximately 2,000 linear feet of roadway between Chabot Terrace and Astor Drive shows signs of settlement due to movement of the hillside below the road.
A geotechnical investigation was performed by Treadwell and Rollo in 2011 that resulted in recommendations for a concrete stitch pier system to stabilize the hillside as well as drainage improvements to reduce erosion below the road.
Analysis
Lake Chabot Road is a popular and scenic route from San Leandro to Lake Chabot Regional Park. Design of these improvements is the first step to ensure that Lake Chabot Road remains available for use by the public and will better position the City to receive grant funding for this project. Heavy rain or earthquakes could increase the rate of hillside movement and failure to address the movement of the hillside could eventually result in closure of the road.
Proposals for design of the recommended improvements were requested in 2017 and three firms submitted proposals. Cal Engineering and Geology was selected as the most qualified firm to provide services based on a history of success with similar projects as well as insightful recommendations for use of a seismic refraction survey to potentially reduce project limits and costs.
This contract represents the current understanding of the work required. Occasionally changes to the scope of contracts are necessary to respond to new information or to include additional items of work ...
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