Title
Motion to accept the construction improvements of 2021 Concrete and Green Infrastructure Project (No. st2203) (Angel Torres, Senior Civil Engineer).
Label
RECOMMENDATION
It is recommended that the City Council, by motion, accept the construction improvements of the 2021 Concrete and Green Infrastructure in accordance with plans and specifications (Total construction cost $1,194,803.10)
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BACKGROUND/DISCUSSION
On September 8, 2021, the City Council of South San Francisco awarded the 2021 Concrete and Green Infrastructure Project to Golden Bay Construction, Inc. of Hayward, California.
The 2021 Concrete and Green Infrastructure Project installed Americans with Disability Act (ADA) compliant concrete curb ramps at approximately 83 locations ahead of the rubberized pavement rehabilitation project. ADA compliant curb ramp installations were located along sections of: Railroad Avenue, First Lane, Second Lane, Third Lane, Fourth Lane, Orange Avenue, Magnolia Avenue, Pine Terrace and along Maple Avenue as identified in the attached vicinity map (Attachment 1).
The work completed consisted of replacement of existing concrete curb ramps with ADA compliant curb ramps, replacement of sections of existing fractured or settled concrete valley gutter, replacement of existing fractured or settled curb and gutter, adjustments to existing drain inlets and underground lines, protection of existing survey monuments within concrete improvement work, and reinstallation of traffic striping and pavement markings removed as part of the concrete work all within the limits of the rubberized pavement rehabilitation work.
The project addressed several concrete areas impacted by Magnolia trees that had outgrown the sidewalk area and were impacting the adjacent sidewalk, curb, gutter, asphalt pavement and underground utilities. The project included storm drain green infrastructure improvements at Magnolia and Palm Avenue and at Magnolia between Miller Ave & Fourth Lane. The project replaced the impacted areas with a combination of permeable pavers and bioretention tree well measures to help support the new trees installed that replaced Magnolia trees that were removed.
The project also reconstructed a section of Fourth Lane at Spruce Ave; improving drainage and replacing sections of fractured concrete roadway.
The Engineering Division inspected the work and found the project to be complete in accordance with the contract documents as of September 22, 2022. Project location map and construction photos are included as Attachments 1 and 2, respectively, of this staff report.
FISCAL IMPACT
This project (No. st2203) is included in the City of South San Francisco’s fiscal year 2022-2023 Capital Improvements Program. There are sufficient funds in FY 2022-2023 to cover the total construction contract costs.
The total construction cost incurred for the project is summarized as follows:
Projected Actual
Construction Contract $ 986,622.00 $ 986,622.00
Construction Contingency (actual ~21%) $ 245,000.00 $ 208,181.10
Total Construction Budget $1,231,622.00 $1,194,803.10
RELATIONSHIP TO STRATEGIC PLAN
Approval of this action will contribute to the City’s Strategic Plan Priority Area 2, Quality of Life Initiative 2.2 by rehabilitating existing streets and curb ramps and helping maintain existing City infrastructure.
CONCLUSION
Staff recommends acceptance of the project as complete. Upon acceptance, a Notice of Completion will be filed with the County of San Mateo Recorder’s office. At the end of the thirty-day lien period, the retention funds will be released to the contractor after the City receives one-year warranty bond.
Attachments:
1. Project Location Map
2. Pre & Post Construction Photos