Benton County, Oregon

Making Benton County a Better Place to Live
Printed on Sep 02, 2015 @ 11:55 AM

Benton County Stormwater Program


Corvallis Stormwater AreaStarting in 2007, Benton County staff from Community Development, Environmental Health, and Public Works developed and successfully implemented a National Pollutant Discharge Elimination System (NPDES) program (see program brochure).

The program requirements are part of the Clean Water Act that local governments and private organizations must comply with for discharges of pollutants into the waters of the United States and regulating quality standards for surface waters. This means that there are many actions that the county is taking in the ‘urbanizing areas' around the cities of Corvallis and Philomath known as the Federal Urbanized Area (see Corvallis area map above at right).

The overall goal of the Benton County Stormwater Program is to reduce the volume of runoff from current development (for example parking lots, subdivisions) and the developing landscape, while reducing the amount of pollutants carried by stormwater runoff to our rivers and streams. In order to meet this overall goal Benton County staff has developed and implemented Six Minimum Control Measures Six Minimum Control Measures:

  1. Public Education and Outreach
  2. Public Participation/Involvement
  3. Illicit Discharge Detection and Elimination
  4. Construction Site Runoff Control
  5. Post Construction Runoff Control
  6. Pollution Prevention/Good Housekeeping

Please report spills within the county roadways to: Benton County Public Works: 541-766-6821. Please report spills within the private land outside of the roadways to: Benton County Environmental Health at 541-766-6841

IF YOU HAVE AN EMERGENCY OR HAZARDOUS SPILL CALL 9-1-1:. Be ready to provide the location, severity, actions taken, and responsible party. Remember that early response protects our shared water quality!


10/16/14:  Construction was completed on the OSU-Benton County dedication a success for the OSU-Benton County Green Stormwater Infrastructure Research Facility, an Oregon BEST Lab!  The project partners (OSU, Benton County, US-Pac Trans, Oregon Water Resources Department, and Oregon Best) designed, constructed, and are monitoring a three-celled stormwater research facility for field-scale experiments and testing on green infrastructure (e.g., raingardens, bioswales, etc.). The cells provide the ability to test various stormwater treatment technologies and treatment of various stormwater contaminants. Learn more here!


Ceremonial pouring of stormwater into sediment bay. From left to right:

David Kenney (Oregon BEST, President and Executive Director), Linda Modrell (Benton County Oregon, Commissioner), Grant Livingston (Oregon State University Graduate Student Lead), Sally Gutierrez (Program Director, US EPA- Water Technology Cluster Initiative), Dr. Michael Scott (Oregon State University, Civil and Environmental Engineering Department Head), Alyssa Mucken (Oregon Water Resources Department, Policy Coordinator), Dr. Meghna Babbar Sebens (Oregon State University, Civil and Environmental Engineering, Assistant Professor), Dr. Arturo Leon (Oregon State University, Civil and Environmental Engineering, Assistant Professor), Chris Bielenberg (Facilities and Utilities Manager, Benton County), Adam Stebbins (Project Coordinator, Benton County)




  Installation of weater station and monitoring equipment, along with planting each treatment cell: different types of vegetation including: mixed native forbs and grasses, grasses only, and no vegetation with Puralytics 'lily pad' technology.

All data from monitoring instruments will be shared on the project website located at:


10/30/14:  All annual reports through 2014 be reviewed on the Document Library web page.


11/1/11: The 2012-2017 Benton County Stormwater Management Plan and Permit Renewal Package was submitted to Oregon Department of Environmental Quality.





For more information please contact Adam Stebbins, Benton County Natural Resources Coordinator, 541-766-6085.