Draft NPDES General Permit for Hydroelectric Generating Facilities in Idaho

Below are EPA's National Pollutant Discharge Elimination System (NPDES) draft general permit and supporting documents for hydroelectric generating facilities in Idaho.

EPA accepted public comments on this proposed permit from April 27 through July 11, 2018 (comment period was extended from original June 11 closing date).

• Permit number: IDG360000
• Effective date: N/A
• Permit expires: N/A

• Public Comments on Draft NPDES General Permit for Hydroelectric Generating Facilities in Idaho, #IDG360000 (pdf)
  Copies of all comments received during the public comment period from April 27 through July 11, 2018.
• Draft NPDES General Permit, Hydroelectric Generating Facilities in Idaho, #IDG360000 (pdf) (April 2018)
  Proposed permit.
• NPDES Permit Fact Sheet, Hydroelectric Generating Facilities in Idaho, #IDG360000 (pdf) (April 2018)
  Technical basis for NPDES general permit.
• Draft Idaho 401 Water Quality Certification, NPDES General Permit for Hydroelectric Generating Facilities in Idaho, #IDG360000 (pdf) (March 29, 2018)
  Idaho's draft certification under Section 401 of the Clean Water Act.
• Biological Evaluation, NPDES General Permit for Hydroelectric Generating Facilities in Idaho, #IDG360000 (pdf) (February 2018)
  Identifies potential impacts to federally listed endangered or threatened species.