How to bid on South Treatment Plant Dissolved Air Flotation Thickener Tanks Rehabilitation for King County, WA

What King County is buying

King County, Washington, is seeking construction services for its South Treatment Plant in Renton, Washington. The project involves modifying or replacing six dissolved air flotation thickener mechanisms, including associated piping, covers, access hatches, and electrical equipment. Additionally, the concrete tank walls for four of these thickener tanks will be modified.

This is a construction opportunity for firms experienced in water treatment plant infrastructure or similar industrial facility upgrades.

Key dates and what happens at the deadline

The solicitation was published on July 21, 2026. The deadline for submitting responses is August 12, 2026, at 4:30 PM ET. All responses must be submitted by this time.

An addendum has been issued. If you have already submitted a response, you must log into the E-Procurement Supplier Portal, acknowledge the addendum, and resubmit your response to ensure it is considered.

Who this opportunity suits

This opportunity is suitable for construction firms with expertise in wastewater treatment plant infrastructure, particularly those with experience in dissolved air flotation thickener systems, piping, electrical upgrades, and concrete modifications.

The project is located in Renton, Washington, and involves specialized construction work within an operational plant environment.

How to respond

To access the full solicitation documents and instructions, you need to go to the King County Oracle procurement portal. You can view the negotiation's public abstract directly on the portal without signing in. If the portal shows a list of abstracts, search for negotiation number KC001675,1.

To download documents or submit a response, you must register a free supplier account on the King County Oracle portal. Ensure you submit your response before the August 12, 2026, deadline. Contact Lea McCormick with any questions.

Tips for preparing a competitive response

Carefully review all solicitation documents, including the recently issued Addendum 1, to understand the full scope of work and any updated requirements. Acknowledge all addenda as required.

Ensure your proposal clearly demonstrates your firm's experience with similar projects, especially those involving wastewater treatment facilities, dissolved air flotation systems, and concrete modifications. Highlight your team's qualifications and any relevant certifications.

Pay close attention to all submission instructions on the King County Oracle procurement portal. Double-check that all required forms and documentation are completed accurately and submitted on time.