Applications and Reference Materials

Applications

Stormwater Submittal Form (PDF)  (NEEDS TO BE FILLED OUT WITH ALL STORMWATER APPLICATION)

 The second page of the submittal form above tells you which form below to use.  You have to meet all of the criteria listed for each project category.  A simplified version is listed in the chart below.  Major projects will require the intake form below and plans designed by an Engineer.

New + Replaced Surfaces (square feet)
Application to Use
Less than 500
NO SUBMITTALS REQUIRED
500 - 1,999
2,000 - 4,999
5,000 +


Minor Project Stormwater Form (PDF)

Small Project Stormwater Site Plan Short Form (PDF)

Major Project Stormwater Intake Form (PDF)

Flow Chart (PDF)

Department of Ecology -industrial Stormwater Permit

Department of Ecology -Construction Stormwater Permit

Reference Materials

EPIC Planning Clearance Information (check for critical areas)

Raingarden Info

Soil Amendment Info

Dike vs Hillside Map (PDF)

Department of Ecology - 2014 SWMMWW

Department of Ecology - 2019 SWMMWW

Cowlitz County Stormwater Drainage Manual - Updated June 2022

2019-2024 Western Washington Phase II Municipal Stormwater Permit