Z--Conlon Creek Culvert Removal & Restoration, GOGA
Overview
Buyer
Place of Performance
NAICS
PSC
Set Aside
Original Source
Timeline
Qualification Details
Fit reasons
- NAICS alignment with historical contract wins in similar service areas.
- Scope strongly matches core technical capabilities and delivery model.
Risks
- Past performance thresholds may require one additional teaming partner.
- Potential clarification needed on staffing minimums before bid/no-bid.
Next steps
Validate eligibility requirements, assign capture owner, and schedule partner outreach to confirm teaming strategy before submission planning.
Quick Summary
The National Park Service (NPS), under the Department of the Interior, is soliciting proposals for the Conlon Creek Culvert Removal & Restoration project at the Golden Gate National Recreation Area (GOGA) in Marin County, California. This Total Small Business Set-Aside opportunity seeks a contractor for long-term channel stabilization, estimated between $500,000 and $700,000. Proposals are due by June 22, 2026, at 12:00 PM PDT.
Scope of Work
The project involves repairing damage from a 2015 culvert blowout on a Redwood Creek tributary. Key tasks include:
- Stabilizing the culvert failure footprint with an engineered rock ramp.
- Constructing three rock step pools to enhance aquatic habitat.
- Removing an 80-foot buried and rusted corrugated metal culvert.
- Stabilizing and filling an adjacent 75-foot gully to reduce sediment contribution.
- Utilizing existing bank and bed materials where possible, with provisions for importing rock.
- All in-channel work is restricted to the period between June 15 and October 15, 2026.
- Davis-Bacon Wage Rates apply, and a site-specific safety and health plan is required.
Contract Details
- Contract Type: Firm-Fixed-Price
- Period of Performance: 365 calendar days after Notice to Proceed.
- Set-Aside: Total Small Business Set-Aside (FAR 19.5)
- NAICS Code: 237990 (Other Heavy and Civil Engineering Construction) with a $45 million size standard.
Submission & Evaluation
- Proposal Due Date: June 22, 2026, by local time (12:00 PM PDT).
- Submission Method: Proposals must be submitted via email.
- Questions: Must be submitted in writing to Quinn_Rankin@ios.doi.gov seven (7) calendar days prior to the proposal due date.
- Site Visit: An organized site visit was held on Thursday, June 4, 2026, at 10:00 AM PDT.
- Evaluation: Award will be based on a Best Value Continuum Tradeoff Process, considering technical factors (Technical Approach, Schedule, Project Experience, Key Personnel Experience, California Contractor State License) and price.
Key Amendments & Clarifications
Amendment 0002, posted June 12, 2026, included the site visit sign-in sheet, Attachment 13 (Questions & Answers), revised Attachment 1 (Specifications), and revised Attachment 2 (Drawings). The Q&A document provides critical clarifications on aspects such as dumpster presence, tributary flow, water access, soil management, tree removal liability, power lines, vegetation trimming, imported rock, and equipment cleanliness. Bidders must review these revised documents for accurate proposal preparation.
Required Attachments
Key attachments include Specifications, Drawings, Wage Decision, Project Experience Questionnaire, Key Personnel Experience, Past Performance Questionnaire, General References, Subcontracting Percentage Worksheet, and Standard Form 24 (Bid Bond). Offerors must be registered in SAM.