Skagit County’s stormwater management requirements differ depending on whether you’re inside or outside the NPDES Permit Area.
Stormwater Site Plan Requirement
When you submit your building permit application, you must show all the stormwater features you will construct to manage stormwater on your site plan. See the Site Plan Requirements handout for details.
If your project is subject to Minimum Requirement 1, you must prepare your site plan consistent with the Stormwater Management Manual; see Volume I, Chapter 3 for guidance.
Construction Stormwater Pollution Prevention Plan Requirement
All applications must include a Construction Stormwater Pollution Prevention Plan (“Construction SWPPP”) to ensure that clearing, grading, and other construction doesn’t cause erosion and release of sediment into the stormwater system. Your permit will require you to follow your Construction SWPPP.
Most applications may use our Simplified Construction SWPPP form. Review the form to see if you qualify, and submit the form with your application. If your project does not qualify, prepare a Construction SWPPP consistent with Stormwater Management Manual Minimum Requirement 2; see Volume II, Chapter 3 for guidance.
Projects that disturb one or more acres must have site inspections conducted by a Certified Erosion and Sediment Control Lead (CESCL).
Construction Stormwater General Permit
Construction site operators are required to be covered by a Construction Stormwater General Permit if they are engaged in clearing, grading, and excavating activities that disturb one or more acres and discharge stormwater to surface waters of the state. Smaller sites may also require coverage if they are part of a larger common plan of development that will ultimately disturb one acre or more. This permit is issued by Ecology, and it’s the operator’s responsibility to obtain it.
Skagit County has adopted Ecology’s 2012 Stormwater Management Manual for Western Washington, as amended in December 2014, as the Stormwater Management Manual for the entirety of unincorporated Skagit County, except the NPDES Permit area. For the NPDES Permit Area,
Skagit County has adopted Ecology’s 2019 Stormwater Management Manual for Western Washington.
The manual, which is standardized across most Western Washington counties, consists of nine Minimum Requirements (MR). See the Stormwater Management Requirements handout for information on when these Minimum Requirements apply.
|MR1 Stormwater Site Plan
MR2 Construction Stormwater Pollution Prevention Plan (SWPPP)
MR3 Source Control
MR4 Preserve Natural Drainage
|MR5 Onsite Stormwater Management
MR7 Flow Control
MR8 Wetlands Protection
MR9 Operations & Maintenance
Low-Impact Development (LID)
Low-Impact Development techniques mimic natural processes to manage stormwater, and are frequently cheaper and more attractive than traditional stormwater management techniques.
When is LID required?
LID is the preferred approach to stormwater management countywide. Inside the NPDES Permit Area and the Special Flood Hazard Area, LID techniques are required unless the Administrative Official determines the techniques as not feasible.
Read our Low-Impact Development handout (PDF) for an overview of required LID techniques. For specifics on implementing techniques, see the Low Impact Development Technical Guidance Manual for Puget Sound (2012, 18mb PDF).
Open a new FSE; remodel or become a new operator of an existing
If you plan
to open a new food business, or remodel your permitted kitchen
or take over an existing food service, you must submit plans
for review. If your planned business is mobile or temporary,
see the specific links elsewhere on this site.
Food Service or Food Cart
food operation has special requirements. It must be on wheels
and easily movable. An approved commissary or support kitchen
is required. Menu and food preparation may be limited. Mobile
units must be approved by Washington Department of Labor and
Industries prior to operating. Contact
Labor and Industries
or Soup Kitchen
provide a valuable service to our citizens in need. The Health
Department does not charge a permit fee for these facilities,
but we appreciate having contact information. We also can provide
advice and information on safe food handling of donations and