Document Library

Benton County Stormwater Program – Document Library

The Benton County Stormwater Program staff has completed several stormwater program planning and implementation documents. These documents will be updated annually as required by the Oregon Department of Environmental Quality Stormwater Program.

  • Benton County National Pollution Discharge Elimination System (NPDES) Permit (2007-2012). The Benton County NPDES permit is a legally binding agreement documenting specific requirements that the county must implement in order to fulfill permit obligations.
  • Benton County Stormwater Management Plan. This plan was developed by Benton County staff from Community Development, Environmental Health, and Public Works in 2007. The plan was adopted by the Benton County Board of Commissioners and is being reviewed by the Oregon Department of Environmental Quality. An update to the plan was completed in 2011 as required by State and Federal law (see ODEQ permit renewal application packagerequirements).

Annual Reports

Annual Reports are submitted by Benton County to the Oregon Department of Environmental Quality, documenting progress towards implementation of the Benton County Stormwater Plan and National Pollution Discharge requirements.

Stormwater Permit Renewal Application Package (submitted October 2011)

The current State permit that authorizes discharges of stormwater from the Benton County Municipal Separate Storm Sewer System (MS4) expires on April 30, 2012. To continue coverage, a permit renewal package was developed by county staff from Community Development, Environmental Health, and Public Works.

The information submitted in the permit renewal application package provided Oregon Department of Environmental Quality with information to conduct an independent evaluation of the stormwater program's ability to reduce pollutants to the maximum extent practicable and effectively prohibit non-stormwater discharges into the MS4, and to develop the next iteration of the MS4 Phase II permits.