Demery Hill Stormwater Vault Retrofit

The City of Sammamish is seeking bids to retrofit the Demery Hill stormwater vault, including installation of an underground water-quality treatment vault, conveyance improvements, demolition, excavation, paving, erosion and traffic control, and roadside restoration.

City of Sammamish > Public Works Department


General
Open
Dec 03, 2026 10:00 PM
Oct 22, 2026 12:00 PM
Invitation for/to Bid (IFB/ITB)
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Contact
jabrams@sammamish.us
Submission Instructions
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Description

The City of Sammamish is seeking a contractor for construction of the Demery Hill Vault Retrofit. Work includes installing an underground water-quality treatment vault; improving stormwater conveyance; demolition and excavation; hot-mix asphalt paving; erosion and traffic control; and roadside restoration. The successful bidder must promptly submit vault shop drawings after contract execution and, following approval, order the treatment vault before the Notice to Proceed. The Notice to Proceed will not be issued before May 1, 2027.

Classification Codes
NAICS237110Water and Sewer Line and Related Structures Construction
PSCY1NCCONSTRUCTION OF POLLUTION ABATEMENT AND CONTROL FACILITIES
Smart Codes
stormwater vault constructionstormwater conveyance improvementsroadway paving and restoration
Specifications
Supply & Service
Timeline
Dec 03, 2026 10:00 PM-Bid Submission Deadline
Documents
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