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  5. ›RFQ PWE - 11.25.2025 - On-Call Engineering Water Modeling…

City of Issaquah·Washington

RFQ PWE - 11.25.2025 - On-Call Engineering Water Modeling Services

Closes 1/9/2026$50k – $200kRequest for QualificationLogin required
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Description

The City of Issaquah is seeking on-call engineering consultants to provide technical support for stormwater modeling, hydrologic and hydraulic analysis, and environmental permitting. The selected consultant will be required to provide a range of services, including system wide water modeling updates, water quality and water age modeling evaluation, and support in the development and planning of new capital improvement projects. The consultant must be familiar with the City of Issaquah Stormwater Management Policy and the King County Surface Water Design Manual. • Support in system wide water modeling updates, calibration, and development • Provide water quality and water age modeling evaluation of the City’s system • Provide available fire flow, static and dynamic pressure for new developments • Support in the development and planning of new Capital Improvement Projects • Perform system capacity analysis and identification of deficiencies • Conduct scenario modeling for various growth scenarios • Support in the development of code or standard detail updates • Provide field inspections as required • Prepare technical memos, modeling summaries and results, and design recommendations

Attached files

The solicitation documents live at the source — open the bid source above to download them.

Contact

Matthew Ellis(Utility Engineering Manager)

[email protected]

(425) 837-3410

Key dates

Opened
11/25/2025
Questions due
12/12/2025
Closes
1/9/2026
Projected award
2/2/2026
Duration
2 years

Last updated

Details

Type
Request for Qualification
Industry
Environmental Services
NAICS
541620
Solicitation №
PWE - 11.25.2025 Water

Budget estimate

$50,000 – $200,000

The estimated budget for this opportunity is between $49,999 and $100,000 per year, based on the available annual budget for Public Works and Community Planning and Development. The actual budget may vary depending on the scope of work and the number of task orders authorized by the City.

AI estimate from the solicitation

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