SAM #140P8626R0003

Conlon Creek Culvert Removal and Restoration at Golden Gate National Recreation Area

The National Park Service at Golden Gate National Recreation Area is seeking a contractor for the Conlon Creek Culvert Removal and Restoration project in Marin County, California. - Government Buyer: - Department of the Interior, National Park Service (NPS), Contracting Operations West, Golden Gate National Recreation Area - Project Scope: - Removal of an 80-foot buried and rusted corrugated metal culvert - Channel stabilization using engineered rock ramp and construction of three rock step pools for aquatic habitat - Stabilization and filling of an adjacent 75-foot gully to reduce sediment - Purchase and transport of rock slope protection materials for erosion control - Implementation of permanent erosion control treatments and plantings - Services Required: - Mobilization, dewatering, selective demolition, construction of weirs, ramp, and apron - All supervision, labor, equipment, testing, and supplies necessary for project completion - Option items include: - Hauling excess soils to landfill - Preparation of as-built drawings - Importing rock for engineered streambed material - Unique/Notable Requirements: - Contractor must obtain all necessary permits and comply with local, state, and federal laws - In-channel work is restricted to June 15–October 15 (year specified as 2026) - Total Small Business Set-Aside under NAICS code 237990 - No specific OEMs or commercial vendors are named in the solicitation

Description

Pre-Solicitation Announcement: Conlon Creek Culvert Removal & Restoration, GOGAThe Department of the Interior, National Park Service (NPS) at Golden Gate National Recreation Area (GOGA) has a requirement to implement a long-term channel stabilization project that would repair damage caused by a 2015 culvert blowout on a tributary to Redwood Creek. Emergency stabilization efforts occurred in 2016. The current channel stabilization design represents input from National Marine Fisheries Service, Regional Water Quality Control Board, as well as NPS technical staff (geomorphologist, aquatic ecologist) and engineering hydrologic consultants. The specifications and drawings call for stabilizing the footprint of the culvert failure and head cut with an engineered rock ramp, construction of three rock step pools to provide for some habitat for aquatic animals, and the removal of a buried and rusted corrugated metal culvert (80 ft). Work would occur along up to 250 ft of creek. In addition, an adjacent gully (75 ft) that is actively contributing sediments to downstream Redwood Creek would be stabilized and filled to reduce future contributions of fine sediments. Existing bank and bed materials would be re-used either in the channel or as fill for the adjacent gully. Rock slope protection would need to be purchased and transported to the site.The Contractor shall provide all supervision, labor, equipment, testing, and supplies necessary to complete the work as identified in the project specifications and associated documents provided as attachments to the solicitation. Contract work includes: 1. Mobilization and Demobilization2. Install, Operate, and Maintain Dewatering and Water Diversion Systems3. Selective Demolition4. Construction of Weirs, Ramp, and Apron5. Permanent Erosion Control Treatments and PlantingsOption Items1. Haul Excess Soils to Landfill2. Prepare As-Built Drawings3. Import Rock for Engineered Streambed MaterialIn channel work is restricted to between June 15, and October 15, 2026All work shall be performed in accordance with local, state, and federal laws. The Contractor shall obtain all necessary permits required to successfully complete the work.All work shall be performed in accordance with local, state, and federal laws. The Contractor shall obtain all necessary permits required to successfully complete the work.The North American Industry Classification System (NAICS) Code for this requirement is 237990, with a corresponding size standard of $45 million in annual gross receipts for the past three years. This acquisition is a Total Small Business Set-Aside. Offers are solicited only from small business concerns. Offers received from concerns that are not small business concerns shall not be considered.Federal Acquisition Regulation (FAR) 36.211(b) requires agencies to provide description of policies and procedures that apply to definitization of equitable adjustments for change orders under construction contracts and data on the time required to definitize equitable adjustments for change orders under construction contracts. This information can be found at: https://www.doi.gov/pam/acquisition/policy/constructioncontract.The Request for Proposal (RFP) will be available on/about Monday, May 18, 2026, by electronic means only and can be downloaded along with all related attachments from the Contracting Opportunities website at ww.sam.gov. The RFP will close 30 days from the actual date of issuance. The offeror is responsible for periodically checking the website for any Amendments that may be issued prior to the closing date of the RFP.The Government intends to award a single, firm-fixed-price contract. All responsible sources may submit a proposal which will be considered by the agency. Evaluation for award will be made in accordance with the negotiated acquisition procedures outlined in FAR Part 15. Award selection will be made on a Best Value determination made after consideration of price and factors other than price (Technical Approach, Schedule, Project Experience, Key Personnel Experience, California State Contractor License, and Past Performance) as listed in Section M of the Request for Proposal.An organized site visit will be scheduled. While not mandatory, offerors are urged and expected to inspect the site where the work will be performed. See Section L of the RFP (when issued) for more information regarding the date, time, and location of the site visit.

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