Stormwater Management
Stormwater from urban areas that discharges to streams is managed under the Oregon Department of Environmental Quality (DEQ) National Pollutant Discharge Elimination System Stormwater Permit (NPDES). Stormwater that is infiltrated into shallow wells is managed under the DEQ Underground Injection Control Permit (UIC).
NPDES Stormwater Program
- DocumentNPDES 2023 Annual Report (2.82 MB)
- DocumentNPDES 2022 Stormwater Management Plan (3.31 MB)
- DocumentNPDES 2022 Annual Report (4.41 MB)
- DocumentNPDES Municipal Separate Storm Sewer Permit 2021 (577.96 KB)
- DocumentNPDES 2022 Annual Report (4.41 MB)
- DocumentNPDES 2021 Annual Report (2.51 MB)
- DocumentNPDES 2020 Annual Report (2.72 MB)
- DocumentNPDES 2019 Annual Report (7.93 MB)
- DocumentNPDES 2018 Annual Report (4.02 MB)
- DocumentNPDES 2017 Annual Report (3.07 MB)
- DocumentNPDES 2016 Annual Report (5.69 MB)
- DocumentNPDES 2016 Annual Report (5.69 MB)
- DocumentNPDES 2015 Permit Renewal Application (2.08 MB)
- DocumentNPDES 2015 Annual Report (3.04 MB)
- DocumentNPDES 2014 Annual Report (4.35 MB)
- Document
- DocumentNPDES 2014 Pollutant Reduction Analysis (9.12 MB)
- DocumentNPDES 2014 Hydromodification Assessment (8.86 MB)
- DocumentNPDES 2013 Annual Report (4.29 MB)
- DocumentNPDES 2012 Annual Report (2.42 MB)
- DocumentNPDES 2011 Annual Report (1.69 MB)
- DocumentNPDES 2011 Stormwater Management Plan (1.75 MB)
- DocumentNPDES 2010 Annual Report (372.9 KB)
- DocumentNPDES 2010 MS4 Permit (1.76 MB)
- DocumentNPDES 2010 MS4 Permit PER Supplemental (578.06 KB)
- DocumentNPDES 2010 MS4 Permit Eval Report (5.25 MB)
- DocumentNPDES 2009 Annual Report (355.48 KB)
- DocumentNPDES 2008 Annual Report (475.41 KB)
- DocumentNPDES 2007 Annual Report (2.62 MB)
UIC Stormwater Program
- DocumentUIC 2022 Annual Report (602.34 KB)
- DocumentUIC 2021 Annual Report (99.89 KB)
- DocumentUIC 2020 Annual Report (91.05 KB)
- DocumentUIC 2019 Annual Report (175.23 KB)DocumentUIC 2019 Annual Report (175.23 KB)
- DocumentUIC 2018 Annual Report (577.58 KB)
- DocumentUIC 2017 Annual Report (492.67 KB)
- DocumentUIC 2016 Annual Report (476.77 KB)
- DocumentUIC 2015 Annual Report (467.48 KB)
- DocumentUIC 2014 Annual Report (50.24 KB)
- DocumentUIC 2014 Permit (625.72 KB)
- DocumentUIC 2014 Systemwide Assessment (4.54 MB)
- DocumentUIC 2014 Monitoring Plan (269.61 KB)
- DocumentUIC 2014 Management Plan (198.32 KB)
Design and Construction Manual
- Document
Pollution Reduction
The County minimizes impacts from Road Operations to protect endangered fish species, including coho and Chinook salmon, and steelhead trout using the Road Maintenance and Operations Manual. The County also reduces specific pollutants from streams in the unincorporated areas through a Total Maximum Daily Load Program.
TMDL Program
- DocumentTMDL 2022 Implementation Plan (966.04 KB)
- DocumentTMDL 2021 Annual Report (365.04 KB)
- DocumentTMDL FY20 Annual Report (364.56 KB)
- DocumentTMDL FY18 and 19 Annual Report (406.17 KB)
- DocumentTMDL 2018 Online 5 year report submission (101.87 KB)
- DocumentTMDL 2017 Annual Report (2.2 MB)
- DocumentTMDL 2016 Annual Report (508.38 KB)
- DocumentTMDL 2015 Annual Report (523.09 KB)
- DocumentTMDL 2014 Annual Report (205.07 KB)
- DocumentTMDL 2014 Implementation Plan (1.16 MB)
- DocumentTMDL 2013 5-Year Program Review (3.22 MB)
- DocumentTMDL 2012 Annual Report (284.63 KB)
- DocumentTMDL 2011 Annual Report (180.36 KB)
- DocumentTMDL 2010 Annual Report (180.7 KB)
Fish Related Reports
During fish surveys in Beaver Creek and Johnson Creek, biologists found 16 different native fish species, including endangered coho salmon and steelhead trout.
- Document
- Document
- Document
- Beaver Creek Fish Survey Photoset
- Johnson Creek Fish Survey Photoset
