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  5. ›RFQ PWE - 11.25.2025 - On-Call Engineering Stormwater…

City of Issaquah·Washington

RFQ PWE - 11.25.2025 - On-Call Engineering Stormwater Modeling and Environmental Permitting Services

Closes 1/9/2026$190k – $400kRequest for QualificationLogin required
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Description

The City of Issaquah is seeking on-call consultants to provide stormwater modeling, hydrologic and hydraulic analysis, and environmental permitting services. The selected consultant will be required to provide technical support for current and upcoming stormwater and stream restoration capital improvement projects and regulatory obligations. The scope of work may include developing and calibrating hydrologic and hydraulic models, performing system capacity analysis, and providing field inspections. The consultant must be familiar with the City of Issaquah Stormwater Management Policy and the King County Surface Water Design Manual. • Stormwater modeling and hydrologic and hydraulic analysis • Environmental permitting and regulatory compliance • Field inspections and site visits • Development of hydrologic and hydraulic models • System capacity analysis and identification of deficiencies • Preparation of technical memos and modeling summaries • Coordination with federal, state, regional, and local regulatory agencies

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 Storm

Budget estimate

$190,000 – $400,000

The available annual budget for Public Works is $49,999, for Community Planning and Development is $20,000, and for Parks is $25,000. Based on this information, the total budget for the selected consultant could be in the range of $95,000 to $200,000 per year, considering the possibility of one-year extensions and the varying work volume. The total budget for the two-year contract period could be between $190,000 and $400,000.

AI estimate from the solicitation

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