TO: Board of Supervisors
FROM: Steven Lederer, Director of Public Works
REPORT BY: Frank Lucido, Engineering Manager
SUBJECT: Approve Award of a Construction Contract and Budget Transfer for the “Redwood Road 5.76 Slide Repair Project”, RDS 21-05
RECOMMENDATION
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Award a Construction Contract to “E.E. Gilbert Construction, Inc.” for the “Redwood Road 5.76 Slide Repair Project”; and approve a Budget Amendment. (Fiscal Impact: $166,377 Expense; Measure T Non-Operating Special Revenue Fund; Not Budgeted; Discretionary)
[4/5 vote required]
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BACKGROUND
Heavy rains in February of 2017 oversaturated a portion of Redwood Road near mile post marker (MPM) 5.76 which serves a small number of residents, causing the edge of the roadway to slide into Redwood Creek and roadway distress for about 60 feet directly above the slide and another 80 feet adjacent to the slide area. On January 5, 2022, the board approved $555,746 from Measure T funds to start the investigation and design process for the project.
Two alternatives were considered for this project. The most expensive alternative has an estimated project cost of $1,800,000 and involves drilling deep into competent material, casting concrete piers and constructing a concrete roadway over the piers. While this option allows for a slightly wider roadway and can be constructed over the area that slid it is not recommended as it does not appear to provide good value for that expense. The roadway narrows in many places in the vicinity of the damage and having a localized area that is wider provides little advantage to passing traffic. Since most of the road in this area has not slid, there isn’t a need to implement this more expensive option. The recommended option has an estimated project cost of $722,000. It involves drilling into competent material and creating a retaining wall of concrete piers. These piers will be tightly spaced to secure soil in the roadway and take advantage of the existing in place hillside materials. Because most of the work for this recommended option is on the roadway, it also has less impact to the creek bank and environment. The Board authorized advertising this project on May 7, 2024 and bids were opened on August 1, 2024 with the following result:
E.E. Gilbert Martinez, CA $278,637
Cowan & Thompson Martinez, CA $279,492
Stacy Witbeck Alameda, CA $339,690
Valentine Corporation San Rafael, CA $346,369
Dexcore Brea, CA $361,353
Globe Engineering Development Fairfield, CA $369,120
Bridgeway Civil Constructors Vacaville, CA $406,500
Requested Actions:
1. Award the construction contract for the “Redwood Road 5.76 Slide Repair Project,” RDS 21-05 to E.E. Gilbert for their low bid of $278,637; and
2. Approve a Budget Amendment for the following (4/5 vote required):
a. Increase Transfer-Out appropriations by $166,377 in the Measure T Non-Operating Special Revenue Fund (Measure T SRF) (Fund 2440, Sub-Division 1220053, Account 56100) offset by use of its available fund balance to fund project S7315; and
b. Increase Construction Services appropriations by $166,377 in project S7315 (Fund 2040, Sub-Division 2040500, Project S7315, Account 52360) offset by a Transfer-In revenue from Measure T.
FISCAL IMPACT
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Is there a Fiscal Impact? |
Yes |
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Is it currently budgeted? |
No |
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Is it Mandatory or Discretionary? |
Discretionary |
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Discretionary Justification: |
Approving this award and budget amendment will stabilize Redwood Road in the project area and avoid more costly repairs in the future. |
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Is the general fund affected? |
No |
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Future fiscal impact: |
No impact is expected in future fiscal years. |
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Consequences if not approved: |
If the roadway isn’t stabilized it will likely slide into Redwood Creek in the future, which not only affects water quality but greatly affects the cost of the repair and ability of residents above the area to drive in and out of their homes. |
ENVIRONMENTAL IMPACT
ENVIRONMENTAL DETERMINATION: Consideration and possible adoption of a Categorical Exemption Class 1: It has been determined that this type of project does not have a significant effect on the environment and is exempt from the California Environmental Quality Act. [See Class 1 (“Existing Facilities”) which may be found in the guidelines for the implementation of the California Environmental Quality Act of 14 CCR §15301; see also Napa County’s Local Procedures for Implementing the California Environmental Quality Act, Appendix B.]