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There are many levels of complexity associated with stormwater permits. A single family home generally must meet "minimum requirements” while a commercial or industrial development, will need to complete a full engineering report or plan.
When you have completed the application, Public Works will review it. Once the application has been reviewed and approved, you will take it back to Building and Planning and the Building and Planning application process will proceed.
You can use the following contacts to report spills and dumping into surface waters or storm drains or Illicit sewer and waste water connections to the stormwater drainage system:
Cowlitz County Department of Public Works at 360-577-3030 or email
Water Pollution Hotline at 360-578-0900
Department of Ecology at 360-407-6300 or email
If the flow Chart indicated "All Minimum Requirements" apply, a professional engineer is required to design a Stormwater Plan in accordance with the Cowlitz County Stormwater Manual.