Planning & Engineering

Developing properties in Washington requires climate-specific stormwater management solutions including Low Impact Development (LID) techniques to reduce flooding, recharge groundwater, and remove contaminants. We design stormwater infrastructure that protects our watersheds, becomes an asset to the site, and meets the requirements of the Stormwater Management Manual for Western Washington or Eastern Washington.

NPDES Permits

MFA works closely with our clients to meet the Washington State Department of Ecology NPDES stormwater permit requirements, including:

• Industrial Stormwater General Permit (read our summary of this permit)
• Construction Stormwater General Permit, including CESCL inspections
• Phase I and Phase II Municipal Permit (MS4)
• Boatyard General Permit
• Sand and Gravel Permit
• Individual Permits

Whether you need a Stormwater Pollution Prevention Plan (SWPPP), recommendations for effective stormwater Best Management Practices (BMPs), or are facing a Level 1, Level 2, or Level 3 Corrective Action response, we are here to help.

MFA also provides technical support and expert witness services for Clean Water Act lawsuits.

BMPs Treatment

Effectively controlling pollution requires implementing a mix of operational, source control, and treatment Best Management Practices (BMPs) selected to fit your site constraints and contaminants.

MFA’s Professional Engineers have the expertise to recommend field-tested BMPs in response to Washington stormwater permit Level 1, Level 2, and Level 3 Corrective Actions.