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Bid Details
Mountain Tunnel Improvements Project [BID TABULATION]

Bid due

2:00 PM

  • Type Construction
  • Department Infrastructure Division
Project Description
The objective of the project the rehabilitation of the raw water Mountain Tunnel and related improvements to control water flow, water quality, and maintenance access. The work includes concrete lining repairs, contact grouting, concrete invert paving, large flow control valving facility, new tunnel adits and access portals, new siphon extension, deep shafts, access road slope stabilization, environmental mitigations, and other site work and restoration. The work is to be performed in Tuolumne and Mariposa Counties, California. The Engineer's estimate ranges from $133,000,000 to $143,000,000. The Contract will be awarded to the responsible bidder submitting the lowest responsive bid.

Only Bidders pre-qualified through the previous Request for Bids process may bid.  A Class “A” California Contractors License is required to bid. Furthermore, each listed subcontractor must possess appropriate active licenses for the work each subcontractor will be performing. 

There will be no bid discounts for this contract. The LBE Subcontracting Participation Requirement is 3.00%. The City will reject Bid submissions not meeting this requirement as Bidders who do not meet this requirement will be deemed non-responsive. Both San Francisco Small & Micro-LBEs and SFPUC-LBEs (Firms certified by SF Contract Monitoring Division) can be utilized to meet this requirement. SBA-LBEs cannot be used to satisfy the LBE subcontracting participation requirement. The LBE subcontracting participation requirement is 3.00% due to the vast majority of the construction work is specialized in-tunnel repairs, hard rock excavations of new tunnel and deep shaft excavation involving explosives, new tunnel portal excavation involving explosives, grouting in tunnels and pre-excavation grouting to control groundwater infiltration, new tunnel linings over waterproofing, sheet membrane waterproofing systems, and roadway slope stabilization involving rock scaling, soil nailing, rock bolting, slope mesh installation and controlled blasting. This specialized work will require that all the interested contractors successfully complete the City’s Qualification Process, verifying their experience and qualifications to undertake the Work, before they can submit a bid for HH-1000. This Mountain Tunnel construction is also located remotely in the Sierra Nevada Mountain Range, about 3 hours from San Francisco, where the number of available LBE subcontractors is limited. Please contact Linda Rainaldi at 415-554-3106 for further information. Subcontracting opportunities may include, but not limited, to the following major types of work: clearing and grubbing/tree removal, earthwork, slope stabilization & retention, rock scaling, rock bolting/anchoring, excavation & grading, paving, gabion & MSE wall installations, shotcrete wall stabilization, reinforced concrete slabs and foundations, masonry buildings, metal building roofs, electrical installations, instrumentation & controls, mechanical & valve installations, HVAC for structures, metal products installations including bulkhead doors, stairs & railings, steel pipe fit-up and welding, temporary water treatment installations & supplies, trucking & hauling, concrete supply & delivery, reinforcing steel supply & delivery, explosives supply, delivery, installation & detonation, well drilling, land & aerial surveying. SWPPP regulatory compliance work. Please refer to Section 01 60 00 in the Specifications regarding the purchase of equipment to achieve the LBE subcontracting participation requirement.

Funding for this project has been provided in full or in part through an agreement with the State Water Resources Control Board.  California’s Drinking Water State Revolving Fund is capitalized through a variety of funding sources, including grants from the United States Environmental Protection Agency and state bond proceeds. The contents of this document do not necessarily reflect the views and policies of the foregoing, nor does mention of trade names or commercial products constitute endorsement or recommendation for use. The Bidder shall comply with all applicable terms and conditions, special provisions, and reporting requirements, as set forth in these specifications, and as may be required by federal law, rule, or regulation. Refer to Specification Section 00 48 10 for more information.

Interested Bidders are encouraged to attend by remote means a teleconference pre-bid and contractor networking conference to be held on July 8, 2020 at 10:00 A.M. To participate by remote means, please access the meeting at this website: Enter meeting ID and click Join. The meeting ID is 917 600 884. To participate by phone, dial +1.408.915.6290 and enter the meeting ID followed by the # key. Attendance of remote attendees will be completed at the end of the pre-bid meeting.

Request for proposal

    $130,000,000 to $150,000,000
    2:00 PM
    ShareFile link to be provided to Plan Holders. Public Bid Opening:
    Contract Administration Bureau

Pre-Bid Conference

  • DATE
  • TIME
    10:00 AM
    Not Mandatory