FROM: Robert Thompson, General Manager
Originator: Mike Dorman, Director of Engineering
SUBJECT:
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SUPPORT BUILDINGS SEISMIC IMPROVEMENTS AT PLANT NO. 1, PROJECT NO. P1-137
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GENERAL MANAGER'S RECOMMENDATION
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RECOMMENDATION: Recommend to the Board of Directors to:
A. Receive and file Bid Tabulation and Recommendation for Support Buildings Seismic Improvements at Plant No. 1, Project No. P1-137;
B. Approve a project budget increase of $3,000,000 for Support Buildings Seismic Improvements at Plant No. 1, Project No. P1-137, for a new total project budget of $33,500,000;
C. Award a Construction Contract Agreement to Icon West, Inc. for Support Buildings Seismic Improvements at Plant No. 1, Project No. P1-137, for a total amount not to exceed $21,808,000; and
D. Approve a contingency of $2,180,800 (10%).
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BACKGROUND
As part of the General Manager's Workplan for FY 2017-2018, Orange County Sanitation District (OC San) committed to enhancing the reliability of its infrastructure. To improve seismic resilience, OC San completed the Seismic Evaluation of Structures at Plant Nos. 1 and 2, Project No. PS15-06. This study evaluated the performance of process facilities and support structures during a significant seismic event.
Project No. PS15-06 initiated a facility-wide seismic upgrade program aligned with the Climate and Catastrophic Event Resilience Policy in OC San's 2021 Strategic Plan. The program prioritizes seismic mitigation projects to be implemented over the next 20 years as part of the Capital Improvement Program.
The study identified multiple staff-occupied buildings and critical structures at Plant No. 1 with deficiencies that would limit safety or immediate occupancy performance following a seismic event. Based on the likelihood and consequences of failure, these structures were assigned a high priority for remediation.
This project includes rehabilitation of the following build...
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