# SAM #W912DW27QA006
Mud Mountain Dam Sewage Lagoon Cleaning, Inspection, and Repair
**Buyer:** Seattle District, USACE
**Posted:** November 09, 2026
**Respond By:** November 24, 2026
**Identifier:** W912DW27QA006
**NAICS:** 237110, 237990
The U.S. Army Corps of Engineers is seeking small-business services to restore the Mud Mountain Dam sewage lagoon in Washington.
- **Government buyer:** U.S. Army Corps of Engineers, Seattle District; W071 ENDIST Seattle KO Contracting Division. The notice identifies Whitny Hart.
- **Scope:** Clean and inspect the lagoon, repair its liner and accessories, and return the system to working condition.
- **Products and quantities:** Replace two broken PVC inlet pipes and fittings; provide one 45-pound pail of compatible chlorination tablets; replace the chlorinator with a **SANURIL Model 100 or equivalent**. The reference drawings also identify SANURIL 115 tablets and a Model 100 chlorinator.
- **Existing/reference materials:** As-built documents identify **GSE** 40-mil HDPE geomembrane, with panels covering 8,143.75 square feet, and 40-mil HDPE liner boots. No replacement quantities are specified for these materials.
- **Work requirements:** Clear the clogged outlet pipe; inspect and repair liner defects and replace defective pipe boots as needed; restore gravel and reinstall the aerator. Required checks include visual inspections, seam tests, vacuum-box and applicable air-lance tests, and controlled water-hold tests.
- **Performance and warranty:** Complete work within 45 calendar days of Notice to Proceed and provide a one-year warranty against material or workmanship defects.
- **Eligibility:** The opportunity is set aside for small businesses.
### Description
This requirement is for the cleaning, inspection, and repair of the Mud Mountain Dam Sewage Lagoon.
A site visit will be offered on 17 November 2026, see attachment for information and registration.
Please pay attention to: Section L, Section M, and FAR 52.228-13 in the solicitation.
[View original listing](https://sam.gov/opp/d2ece76f8de6458a82fc975939de3369/view)