Below are EPA's National Pollutant Discharge Elimination System (NPDES) municipal separate storm sewer system (MS4) final permit and supporting documents for the Idaho Transportation Department District #3 (ITD3) in Idaho.
- Permit number: IDS028177
- Effective date: February 1, 2021
- Permit expires: January 31, 2026
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NPDES Stormwater Permit, Idaho Transportation Dept. District 3 MS4, #IDS028177 (PDF)(61 pp, 671 K,
December 8, 2020)
Final stormwater permit.
Appendix B1: Stormwater Management Program Template, MS4 Permit #IDS028177 (PDF)(25 pp, 988 K)
Optional template for creating or revising Stormwater Management Program (SWMP) document.
Appendix B2: Annual Report Form, MS4 Permit #IDS028177 (PDF)(21 pp, 827 K)
Format for annual report. Due no later than December 1 of each year.
NPDES Permit Fact Sheet for Ada County Highway District MS4, Canyon Highway District No. 4 MS4, and Idaho Transportation Department District 3 MS4 (PDF)(65 pp, 2 MB,
Technical basis for NPDES stormwater permits: #IDS028185, #IDS028134, #IDS028177.
Response to Comments on Draft NPDES Permit for Idaho Transportation Dept. District 3 MS4, #IDS028177 (PDF)(18 pp, 3 MB,
EPA's responses to public comments on the September 2020 draft permit.