GOGA 336173 - Repair Conzelman Rd

The National Park Service Denver Service Center, operating under the Department of the Interior, is seeking qualified contractors to repair Conzelman Road at Golden Gate National Recreation Area in Marin County, California through construction of a concrete retaining wall with deep pile foundations and steel bridge rail to address coastal bluff erosion that has threatened roadway stability. The project falls under NAICS code 237310 (Highway, Street, and Bridge Construction) with a $45 million size standard and PSC code Z2LB (Repair or Alteration of Highways/Roads/Streets/Bridges/Railways). Key requirements include the contractor's ability to manage full roadway closures during construction while accommodating weekend reopening for bicycle and motor vehicle traffic, implement protective measures for archaeologically sensitive areas with daily work schedules, and mitigate natural hazards including poison oak. Interested contractors must submit completed Sources Sought Survey Questionnaires by May 29, 2026 at 2:00 PM Mountain Time to Contracting Officer Shellie Murphy (shellie_murphy@ios.doi.gov) addressing their federal prime contracting experience, bonding capacity, retaining wall construction expertise, and SBA certifications. This is a market research Sources Sought Notice; a competitive Request for Proposals is anticipated for issuance in Winter 2026/Early 2027, with award of a single Firm-Fixed-Price contract.

This Pre-Solicitation Notice includes no set-aside designations and does not identify any incumbent contractors or current contract holders. The government seeks offers with a total price between $1,000,000 and $5,000,000, provided as courtesy information rather than a binding ceiling or floor. The anticipated period of performance is 180 calendar days with expected project completion by Summer 2028. Bid, Performance, and Payment Bonds are anticipated to be required for the award. The construction site benefits from proximity to suppliers and lodging facilities within 12 miles, and the park will remain open during construction to minimize visitor impact. No reimbursement will be provided for response costs to this market research notice.