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Pre-Solicitation Announcement: Conlon Creek Culvert Removal & Restoration, GOGA The 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 Demobilization 2. Install, Operate, and Maintain Dewatering and Water Diversion Systems 3. Selective Demolition 4. Construction of Weirs, Ramp, and Apron 5. Permanent Erosion Control Treatments and Plantings Option Items 1. Haul Excess Soils to Landfill 2. Prepare As-Built Drawings 3. Import Rock for Engineered Streambed Material In channel work is restricted to between June 15, and October 15, 2026 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. 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 da…
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