Stormwater Management Plan Documents - Oregon



Oct 8, 2010

ODOT Stormwater Management Plan Documents

ODOT has three main documents that provide an overview of the ODOT stormwater system and how it is managed to minimize impacts to the environment. The primary document is the ODOT Stormwater Management Plan (SWMP) which was prepared in 1999 to obtain ODOT’s current statewide National Pollutant Discharge Elimination System (NPDES) Municipal Separated Storm Sewer System (MS4) Permit. This permit was issued by the Oregon Department of Environmental Quality (DEQ) in 2000. Some ODOT stormwater management practices described in the document have evolved and changed since the plan was written over 10 years ago, but the plan is still considered ODOT’s official SWMP in regards to the ODOT NPDES permit program. The ODOT 1999 SWMP is attached below.

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ODOT also has in place a statewide Total Maximum Daily Load (TMDL) Plan that was prepared in 2001 to provide direction and guidance on how ODOT protects water quality limited streams from pollutants associated with ODOT highways and ODOT stormwater runoff. The ODOT statewide TMDL plan is attached below.

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Finally, ODOT has recently committed to a number of changes to its NPDES SWMP as agreed with the Northwest Environmental Defense Center (NEDC) in 2009. The ODOT/NEDC Settlement Agreement documents these changes and is attached below.

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Both the ODOT SWMP and TMDL plans are approximately ten years old and ODOT has plans to update these plans in the near future. This is part of an effort to renew ODOT’s statewide NPDES MS4 permit. ODOT expects to work closely with DEQ in updating both the ODOT NPDES and TMDL plans.

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In order to avoid copyright disputes, this page is only a partial summary.

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