Stormwater Control Transfer Program

This draft guidance applies to the Phase I and Western Washington Phase II Municipal Stormwater Permits. The guidance document lays out features of an alternative program (a Stormwater Control Transfer Program) that Western Washington State municipal stormwater Permittees (Permittees) can implement to satisfy permit requirements associated with flow control triggered at new and redevelopment sites.

Draft Guidance and Comments

Ecology’s current draft (second draft) was released on March 1, 2016. The major revisions reflected in the second draft document include scaling back the program to focus on transfer of flow control requirements and providing a four-step process for setting priorities among watersheds in a given jurisdiction or area. The public comment period ended on April 30, 2016.

Ecology is issuing this second draft guidance in concert with a companion draft guidance, Building Cities in the Rain, being issued by the Department of Commerce. The Building Cities in the Rain guidance describes a four-step watershed prioritization process for stormwater retrofits. See the Building Cities in the Rain webpage for background on the project and draft prioritization guidance. The Building Cities in the Rain guidance was available for comment up until April 30, 2016.

Second draft guidance document (March 1, 2016)

Comments received on the second draft:

Ecology released an earlier draft guidance on a Stormwater Control Transfer Program for public comment on May 14, 2015. The public comment period ended on July 14, 2015.

We received a number of comments on the first draft document:

Background

This stormwater management approach directs stormwater control efforts to watersheds where addressing flow control is more likely to help maintain or restore designated and existing beneficial uses. Permittees establishing a Stormwater Control Transfer Program must seek input from natural resource agencies and must obtain Department of Ecology approval of their program (through PH I: S5.C.5.a.i or PH II S5.C.4.a.i of the Western Washington Municipal Stormwater Permits).stormwater Permittees (Permittees) can implement to satisfy permit requirements associated with flow control triggered at new and redevelopment sites. This stormwater management approach directs stormwater control efforts to watersheds where addressing flow control is more likely to help maintain or restore designated and existing beneficial uses. Permittees establishing a Stormwater Control Transfer Program must seek input from natural resource agencies and must obtain Department of Ecology approval of their program (through PH I: S5.C.5.a.i or PH II S5.C.4.a.i of the Western Washington Municipal Stormwater Permits).

Ecology's approval of a Stormwater Control Transfer Program will be made public and can be appealed.

Ecology does not propose relaxing the requirements, but allowing local governments to use a strategy to shift stormwater improvements triggered by the existing requirements to higher priority watersheds. The anticipated advantage of this type of program is that efforts will focus on priority watersheds at a rate greater than the default site-by-site application of the municipal permits' minimum requirements.

Questions

If you have questions, please contact Dan Gariépy at dan.gariepy@ecy.wa.gov or 360-407-6470.



Last updated July 2016