TO: Board of Supervisors
FROM: Steven Lederer - Director of Public Works
REPORT BY: James Reese - Associate Engineer
SUBJECT: Amendment to Professional Services Agreement No.190001B for Biggs Cardosa Associates, Inc. for the Garnett Creek Bridge Replacement Br No. 21C0042, RDS 16-16.
RECOMMENDATION
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Approve and authorize Amendment No. 1 to Agreement No. 190001B with Biggs Cardosa Associates, Inc. to increase the maximum compensation by $75,032, for a new maximum of $1,108,317, to provide technical and construction support services for the Garnett Creek Bridge Br. No. 21C0042 Bridge Replacement Project, RDS 16-16. (Fiscal Impact: $75,032 Expense; Roads Capital Improvement Projects Fund; Budgeted; Discretionary).
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BACKGROUND
Garnett Creek Bridge (Br. No. 21C0042) was damaged in the August 24, 2014, Napa earthquake and the bridge is currently closed. The bridge is a stone masonry arch bridge on Greenwood Avenue approximately 0.2 miles northeast of Myrtledale Road. The bridge was constructed in 1904 and it is listed in the National Register of Historic Places. Garnett Creek Bridge is designated as an Off-System bridge and the Project is eligible for 100% Federal funding with Toll Credits paying the local match funds. The total estimated project cost including design, environmental clearance, right-of-way, construction engineering and construction is approximately $10.2 million.
The California Department of Transportation (Caltrans) approved Preliminary Engineering (PE) funds (E76 for PE) for the amount of $1,142,282. Caltrans does not allow the County to invoice for the “fully burdened” staff billing rate and other “non-participating” expenses that total approximately $150,000 for the preliminary engineering phase. Staff propose paying these expenses from the Roads fund.
Over the past 10 years, Caltrans, the design consultants, and County staff evaluated replacing versus retrofitting the existing bridge. After completing several studies and meeting with property owners near the bridge, Caltrans approved the Bridge Type Selection for a retrofit instead of a replacement. The consultants will design a slab bridge to span over the existing stone masonry arch that will be supported by cast-in-drilled hole foundations.
The consultants completed the Phase 1 Exploration for cultural resources and Caltrans staff determined that additional exploration is required to comply with Section 106 of the National Historic Preservation Act of 1966. An additional $75,032 is requested to submit a combined Archaeological Survey Reports/ Extended Phase I Exploration (ASR/XPI), a Supplemental Extended Phase I Exploration (Supplemental XPI), and a Historic Resources Evaluation Report (HRER) that are required for National Environmental Policy Act (NEPA) clearance. This amendment request seeks additional funding for the XP1 due to increased sensitivity from Caltrans and the State Historic Preservation Officer (SHPO) regarding cultural resource preservation. It also includes an extension of the consultant's contract to ensure continued work on the project.
Requested Action:
Approve and authorize Amendment No. 1 to Agreement No. 190001B with Biggs Cardosa Associates, Inc. (BCA) to increase maximum compensation by $75,032, for a new maximum of $1,108,317 and extend the term for an additional five years for additional engineering services for the Garnett Creek Bridge Br. No. 21C0042 Bridge Replacement Project, RDS 16-16.
FISCAL & STRATEGIC PLAN IMPACT
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Is there a Fiscal Impact? |
Yes |
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Is it currently budgeted? |
Yes |
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Where is it budgeted? |
CIP Project #16003 |
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Is it Mandatory or Discretionary? |
Discretionary |
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Discretionary Justification: |
The Garnett Creek Bridge must be repaired to open the bridge for first responders. Funding from the Roads Operational Budget alone will not be sufficient to cover the costs of repair; funding will be supplemented by Federal funds. |
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Is the general fund affected? |
No |
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Future fiscal impact: |
It is anticipated that the preconstruction work could continue into fiscal year 2026-27. The Garnett Creek Bridge Replacement Project is eligible for100% Federal funding; however, some expenses may not be eligible and will be paid for by the Roads fund and / or Measure T funds. |
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Consequences if not approved: |
The County will forfeit Federal Highway Administration HBP grant funds, the County would not replace the existing bridge, and the County might be required to return the HBP funding received to date. |
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Additional Information |
FY 2015-16 budget included $860,000 for the preliminary work ($850,000 from Federal funding and $10,000 from Roads fund). With the receipt of the E76 (grant authorization form) for $650,000, the FY 2015-16 budget was revised to $660,000 ($650,000 from Federal funding and $10,000 from the Roads fund) as part of the re-encumbrance for the FY 2016-17 budget. The FY 2016-17 budget included $1,447,832 ($1,352,832 from Federal funding and $95,000 from the Roads fund) for a total of $105,000 from the Roads fund. On May 15, 2018, the Board approved a budget transfer of $45,000 from the Roads Operations fund and $509,412 from anticipated revenue from Caltrans. |
ENVIRONMENTAL IMPACT
ENVIRONMENTAL DETERMINATION: The proposed action is not a project as defined by 14 California Code of Regulations 15378 (State CEQA Guidelines) and therefore CEQA is not applicable. County staff and the consultant are preparing a CEQA document for the Board to review and approve at a future meeting.