Z--GOGA 336173 - Repair Conzelman Rd

The National Park Service (NPS) Denver Service Center has issued a Sources‑Sought Notice (GOGA 336173) to conduct market research for the repair of Conzelman Road in the Golden Gate National Recreation Area, Marin County, California. The effort will involve designing and constructing a concrete retaining wall with deep‑pile foundations and a steel bridge rail to stabilize a coastal bluff that has undermined the roadway. Work will be performed on main park roads while the park remains open, requiring coordination of equipment inspections, material deliveries, and protective measures for archeologically sensitive areas, hazardous vegetation (e.g., poison oak), and surrounding environment. The contractor must provide a daily work schedule for any ground‑disturbing activities, manage limited road closures (with weekend reopening for cyclists and vehicles), and adhere to a 180‑day performance period. Anticipated contract type is a single‑award firm‑fixed‑price, with a price range of $1 M–$5 M (not a ceiling), NAICS 237310, and required bid, performance, and payment bonds. Responses to the attached questionnaire are voluntary and must be submitted by 2 PM MT on 29 May 2026; no cost reimbursement will be provided.

Notice ID

2157c0679ca24f9f9e935be280b718cf

Solicitation Number

140P2026R0072

NAICS Code

237310

Classification Code

Z2LB