Oregon Buys #S-C01010-00018145

Aeration basin, diffuser, and SCADA improvements at Tri-City Water Resource Recovery Facility

Clackamas County Water Environment Services is seeking a contractor to refurbish four aeration basins at the Tri-City Water Resource Recovery Facility in Oregon City. - Buyer: Clackamas County, Water Environment Services, Procurement Division. - Project scope: Refurbish four conventional activated-sludge aeration basins and related systems, with work phased to maintain facility operations. The engineer’s estimate is $3.7 million. - Major equipment and quantities: Replace 16 zonal air-flow control assemblies; install 3,315 SSII-9 EPDM diffuser membranes across Basins 1, 3, and 4; furnish and install 1 PLC panel and 3 Remote I/O panels; install 40 stainless-steel weir-slot cover plates; and provide 4 V706 filtered pressure regulator assemblies. Four access hatches are an additive bid alternate. - Other work: Basin cleaning and repairs; valve, gate, actuator, and seal work; air and sludge piping modifications; flow meters and instrumentation; electrical, communications, and SCADA improvements; structural work; demolition of 2 polymer storage tanks and salvage of their mixers; and testing of hatch installations. - OEMs and vendors: No equipment manufacturer or OEM is identified by company name. SSII-9 is the specified diffuser-membrane designation, with approved equals allowed where specified. Bid Locker is named as the electronic bid-submission platform; no equipment vendor is named. - Notable requirements: Prevailing-wage requirements and documented good-faith outreach to underrepresented subcontractors apply. Membrane installations require leak testing; liquid-containment hatch installations require liquid-tightness testing. The contractor must verify existing field conditions and coordinate work around facility operations. - Schedule: Work is planned across summer shutdown seasons, with substantial completion within 700 days after Notice to Proceed and final completion within 30 days after substantial completion. No option years or annual subscription are stated.

Description

Clackamas County, on behalf of Water Environment Services, is soliciting sealed bids for improvements to the Tri-City Water Resource Recovery Facility aeration basins. The work is a public improvement contract; bids must be submitted electronically through Bid Locker by November 10, 2026, at 2:00 PM Pacific Time. A mandatory pre-bid conference is scheduled for October 21, 2026, at 1:00 PM at the Tri-City WRRF Administration Building in Oregon City. The engineer’s estimate is $3,700,000, and prevailing wage requirements apply.

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