NPDES Sediment Removal Wilburton Pond

The City of Bellevue Parks and Community Services Department is requesting bids for sediment removal and thermal treatment at Wilburton Pond (Bid 26089) to meet NPDES requirements, with bids due August 20, 2026 at 2:00 p.m. PST and an optional pre-bid site meeting on August 13, 2026 at 9:00 a.m.

Washington prevailing-wage requirements under Chapter 39.12 RCW apply; contractors must obtain prevailing wage rulings and file Statements of Intent to Pay Prevailing Wages prior to contract payment. Performance bonds and payment bonds are required; bid bonds are not.

The work scope encompasses dewatering of approximately 222 cubic yards of contaminated sediment using sump or sewage pumps, excavation and removal via dump truck and vactor truck, thermal treatment (incineration) of sediment with confirmed lube-oil content (410–1,500 mg/kg per July 2026 testing by OnSite Environmental Inc.), and installation of site controls including construction fencing along soccer field and school district boundaries, safety signage, sediment-control wattles, and tree protection as required by permit. All permits, including Clearing and Grading and Noise, have been obtained. Work must be completed by September 30, 2026, contingent on Notice to Proceed from the Project Manager.

The project manager's estimate is $125,000, payable in one lump sum upon project completion. The City reserves the right to reject any and all bids and waive irregularities. Award goes to the lowest responsive responsible bidder. The successful contractor must obtain a City of Bellevue business license and Certificate of Insurance with specified coverage prior to contract execution, and submit all contract documents within three business days of award. Bids are submitted through the City's eProcurement Public Purchase portal (www.publicpurchase.com). No grant funding is involved.