The Boise/Garden City Phase 1 MS4
Permit requires the completion of Watershed
Management Plans for drainage areas served by the MS4 no
later than September 30, 2016. The co-permittees determined
that the Main and Americana sub-watersheds, located in Downtown
Boise, were appropriate for sub-watershed planning. The Ada
County Highway District, on behalf of the Partners, has completed
the development of the plans.