Stormwater Program Home
Stormwater Program
How can we help you?
Public Works is located at 360 SW Avery Ave in Corvallis. Please submit your Erosion and Sediment Control (ESC) and Stormwater Management (SWM) permit applications at this location.
We welcome you to email or call us at 541-766-6821 for assistance.
Erosion and Sediment Control (ESC)
This permit is necessary for if you plan to disturb or create a solid surface on at least one-quarter acre of land. To calculate your impact or disturbed area, use this worksheet.
I need a Stormwater Management Permit
Your construction project may require this permit. To determine your impervious area, use this worksheet.
If you want your road to be applied annually with dust control treatment, fill out this application and pay the fees. Learn more.
Report a Water Quality Concern
For Emergency/Hazardous Spills, please call 911 and prepare to provide location information
Call Public Works at (541) 766-6821 or email us to report the following concerns:
- Erosion control, sediment or construction site runoff
- Water pollution or dumping
- Spill on roadway – Call office, do not email
Call Environmental Health at (541) 766-6841 or email us to report the following concerns:
- Spill outside of the roadway on private land – Call office, do not email
- Septic system issue
What We Do
The Benton County Stormwater Program’s main goal is to reduce the amount of pollution and sediment entering our rivers and streams. We have administered a National Pollutant Discharge Elimination System (NPDES) stormwater program since 2007 as part of the national Clean Water Act. The Benton County Stormwater Management Plan was developed by Benton County Community Development, Environmental Health, and Public Works in 2007 and adopted by the Benton County Board of Commissioners.
The Stormwater Management Plan
The Benton County Stormwater Management Plan (SWMP) outlines how we are meeting our permitting requirements through the NPDES.
Benton County updated its NPDES Phase II MS4 Permit on February 21, 2023 and the corresponding amendments to Benton county Code went into effect on March 23, 2023.
Best Management Practices
Benton County uses Best Management Practices (BMPs) to minimize environmental impacts during work in County facilities, roadways, and construction sites.
These Best Practices include proper erosion and sediment control and reducing our impact footprint on Benton County’s natural resources.
Program Requirements
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 ‘urbanized areas’ around the cities of Corvallis and Philomath known as the Federal Urbanized Area.
Program Goals
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.
