Watershed Management

APDES Permit

Our Municipal Separate Storm Sewer System (MS4) discharges stormwater into more than 30 waterways and wetlands within the Municipality of Anchorage (Municipality) and in State of Alaska rights-of-way owned or operated by the Alaska Department of Transportation and Public Facilities (DOT&PF). The National Pollutant Discharge Elimination System (NPDES) Program originated under section 402 of the Clean Water Act (CWA, 33 USC §1251), which requires that pollutant discharges to surface water be authorized by permit. Together, the Municipality and the DOT&PF are authorized to do so through an Authorization to Discharge under the National Pollutant Discharge Elimination System. This authorization, Alaska Pollutant Discharge Elimination System (APDES) Permit No. AKS 05255-8, is effective from August 1, 2020 to July 31, 2025. The new permit will require an update to the Term III Quality Assurance Plan (QAP).

The APDES Permit also allows discharge of certain non-stormwater flows, as well as stormwater discharge associated with industrial activity and construction. It outlines compliance responsibilities, limitations, and the requirement of a Stormwater Management Program. The permit incorporates a schedule for compliance, and outlines strict monitoring, record keeping, and reporting requirements. Civil, administrative, and even criminal penalties can apply if the conditions of the permit are not met.

2020 Annual Meeting

The 2020 APDES Annual Meeting was held on Wednesday, February 26th at the BP Energy Center. This year, the format for the meeting was an open house and including a poster display session with breakout discussions on permit related topics. An agenda for the meeting is availible here. If you would like more information on the the 2020 Annual Meeting or future Annual Meetings, please contact us at 907-343-8135.


2019 Annual Report

Read our 2019 APDES Annual Report for more detailed information about the permit and actions taken to meet permit requirements. The 2019 Annual Report was submitted to the Alaska Department of Conservation on February 5th, 2020. Last year's annual report can be found HERE.


2019 APDES Annual Report 637 KB
2019 APDES Annual Report Certification Documents 1.4 MB


App A1a 2019 ARDSA Operations Summary   255 KB
App A1b 2019 CBERRRSA Operations Summary 2.6 MB
App A1c 2019 GSA Operations Summary  264 KB
App A1d 2019 ADOT Operations Summary  270 KB
App A2 Watershed Plan Evaluation 25 MB
App B1 2019 ADOT Construction Projects  61 KB
App B2 2019 ADOT Construction Violations  3 MB
App D1 2019 Brewery Spent Grains Waste Report 184 KB
App E1a 2019 ARDSA Waste Disposal Update   130 KB
App E1b 2019 CBERRRSA Waste Disposal Update 130 KB
App E1c 2019 GSA Waste Disposal Update 168 KB
App E1d 2019 ADOT Waste Disposal Update 159 KB
App E2a 2019 ARDSA SOP Revisions 379 KB
App E2b 2019 CBERRRSA SOP Revisions  420 KB
App E2c 2019 GSA SOP Revisions   1.7 MB
App E2d 2019 ADOT SOP Revisions   583 KB
App E3a 2019 ADOT&PF Street Sweeping Report 4.5 MB
App E3b 2019 MOA Street Sweeping Report  4.5 MB
App E4 2019 Pesticide Application Summary 1 MB
App E5a 2019 ARDSA Facility SWPPP Inspection Reports  34 MB
App E5b 2019 CBERRRSA Facility SWPPP Inspection Reports  31 MB
App E5c 2019 ADOT Facility SWPPP Inspection Reports 11 MB
App F1 2019 Prohibited Discharge Complaints Map   344 KB
App F2 2019 Dry Weather Screening Report  88 MB
App G1 2019 Education Summary Report  8 MB
App G2 2019 Annual Meeting Summary   20 MB
App G3 2019 Biannual Meeting Summaries   216 KB
App H1 2019 Stormwater Outfall Monitoring Report  1.7 MB