Stormwater funding requirements

Bioretention facility on the side of the road

Bioretention facility

On this page you will find stormwater project requirements and resources such as forms, design guidance, and templates for the Water Quality Combined Funding Program. These requirements apply for any stormwater projects that may have received funds from Stormwater Financial Assistance Program (SFAP), Centennial, and CWSRF Loan. 

If you are looking for application information such as eligibility, how to score well, and applicant training materials please visit the Water Quality Combined Fund Applicant webpage.

Training for new recipients

We provide recipent training annually by webinars, that are typically held in July. See below for the most current information (dates/times of current trainings or presentations of previous trainings). We recommend recipients attend their project type training and any Environmental and Cultural Resources traning necessary.

Register for Stormwater Facility and Activity Projects: July 16, 2024, 8:30 a.m. - 4 p.m.

  • Morning Session (8:30 a.m. to 12 p.m.)
    • Grant Agreement Development, Negotiation, & Templates
    • EAGL Demonstration & EAGL Roles
    • Payment Requests / Progress Reports (PRPRs)
    • Agreement Amendments
    • Agreement Close Out
  • Afternoon Session (1 p.m. to 4 p.m.)
    • Construction Design Deliverables
    • Stormwater Planning Projects
    • GIS and Project Site Visits
    • Meet Your Ecology Project Managers (breakout rooms)

Register for Environmental Review for Loan Agreements: July 18, 2024, 10 a.m. - 11 a.m.

Register for Cultural Resources Review for All Projects: July 18, 2024, 1 p.m. - 3 p.m.

Previous Presentations

Other materials

Requirements for all projects

All funded projects must adhere to:

If your project received Clean Water State Revolving Funds (CWSRF) Loan, there are additional requirements.

Cultural resources review

  • You must complete Ecology’s cultural resource requirements before any geotechnical work, acquisition, site prep work, or construction takes place.  
  • To initiate cultural resources review, you will complete and submit an Ecology Cultural Resources Review Form and Inadvertent Discovery Plan to the Ecology Project Manager. 
  • For more information and links to these forms, visit the Environmental and cultural resources review page and Appendix N of the WQC Funding Guidelines.

Environmental review

Most stormwater projects require State Environmental Policy Act (SEPA).

  • You, as the Recipient, are the lead agency and will determine if SEPA is required.
  • Upload the SEPA Checklist and notify the Ecology Project Manager when the official comment period begins.
  • For more information, visit the Environmental and cultural resources review page.

Procurement, purchasing, and contracts

State procurement requirements apply to all projects. You can find further information in the Yellow Book (pg. 48).

Contract clauses and specifications inserts for state funded projects:

GIS guidance

  • We require GIS deliverables for facility projects. The GIS data informs project management and implementation and aids in understanding project effectiveness.
  • Accepted formats include web maps, map services, feature services, shapefiles, and file geodatabase files. Use the Stormwater Facility GIS file geodatabase templates to format the best management pracitce (BMP) and contributing area data.
  • See Stormwater Deliverables Guidance (Section 2.7) for more information. 

Project close out 

  • You should begin preparing for agreement close out at least 90 days before the agreement expiration date.
  • An Outcomes Summary and a Recipient Close Out Report in EAGL must be submitted for all projects. Find your project type below for templates and directions on how to fill out these forms. 
  • Final PRPRs are due within 30 days after the project expiration date.

Activity project resources

Facility project resources

Project deliverables

Grant Project Deliverables Summary. Additional resources are included in Appendix L of the Funding Guidelines. 
Deliverable Ecology Initial Review Period (calendar days) Step 2 Design Step 3 Construction All Other Grant Types
Cultural Resources Review (CRR) - CRR Form and IDP 45-65  ✔  ✔  ✔
SEPA TBD  ✔  ✔  
SERP (for CWSRF loan-funded projects) TBD      
Design Report 45  ✔  ✔  
90% Design Package 45  ✔  ✔  
Final Bid Package 15  ✔  ✔  
Change Orders 10    ✔  
CQAP 15    ✔  
Facility O&M Plan 15    ✔  
QAPP (monitoring) TBD      
GIS Data - Preliminary 15  ✔    
GIS Data - Complete TBD    ✔  
Enhanced maintenance Plan (EMP) 45      ✔
Stormwater Management Action Plan (SMAP)/Step 1 Stormwater Facility Planning 45      ✔
Close Out Deliverables TBD  ✔  ✔  ✔


View project requirements and resources by project type