Jobsite Planning

Now that I have applied for my permit, what do I need to do now?

Glossary of terms


General Permit Online Application

SWPPP Required reading:

Permit Holders Guide to Erosion Control

2012 (revised 2014) WesternWashington Stormwater Manual

2014 Western Washington Stormwater Manual Vol II

2004 EW Manual

Stormwater Erosion and Sediment Control For Large Parcel Construction

SWPPP Development

SWPPP Must be prepared BEFORE you break ground! The SWPPP is a two-part document, a narrative and a plan (temporary erosion and sediment control plan).

SWPPP Requirements Permit Section S9


Programs equivalent to the 2014 Stormwater Management Manual for Western Washington

All six Phase I permittees (Snohomish, King, Pierce, and Clark counties, and the cities of Seattle and Tacoma) submitted draft codes and manuals to Ecology for review. Our staff evaluated the submittals for equivalency with the 2012 Stormwater Management Manual for Western Washington as Amended in December 2014 (The 2014 SWMMWW), and worked through revisions with permittees.

Preliminary approval documents

Ecology has not yet formally approved any programs as being equivalent to Appendix I in the Phase I Municipal Stormwater Permit (effective Aug. 1, 2013) and the required portions (according the Municipal Stormwater Permits) of our 2014 SWMMWW.

We provided preliminary approval to the six Phase I permittees. Our determination will not become final until after we conduct a public review process associated with modification of Appendix 10 of the Phase I Permit.

WSDOT Highway Runoff Manual

We completed our review of the 2014 Washington State Department of Transportation Highway Runoff Manual (The 2014 HRM) and found that it meets the BMP selection, design, infeasibility criteria, and limitations for public road projects equivalent to Ecology’s 2014 SWMMWW and 2004 Stormwater Management Manual for Eastern Washington.

These are primarily located within Chapter 5 and Chapter 6 of the 2014 HRM. Other sections of the 2014 HRM contain WSDOT-specific guidance that may not be deemed part of an equivalent program for a municipality.