Benton County Stormwater Program – Document Library
This page serves as a collection point for all Stormwater Program-related documents and resources found throughout the Program website.
Select a category to be directed to associated information:
- Benton County NPDES Permit (2019-2024)
- Benton County Stormwater Management Plan (SWMP)
- Annual NPDES Permit Report
- Application Forms for Benton County Residents
- Benton County DEQ Permits
- Maps and GIS Resources
- Benton County Stormwater Code
- Benton County Best Management Practices
- Stormwater Educational Documents
- 2012 Erosion and Sediment Control Manual (*2023 Design Manual coming soon*)
- Stormwater Training Materials for Benton County Employees
The Benton County National Pollutant Discharge Elimination System (NPDES) permit is a legally binding agreement documenting specific requirements that the county must implement in order to fulfill permit obligations.
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 package requirements).
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.
Erosion and Sediment Control and Stormwater Management permit applications for residents of Benton County.
- FORM Benton County Erosion & Sediment Control (ESC) Application (2023 Version)
- FORM Benton County Stormwater Management (SWM) Application (2023 Version)
- WORKSHEET Benton County ESC Application: DISTURBED AREA
- WORKSHEET Benton County SWM Application: IMPERVIOUS SURFACE AREA
Benton county is a permitted through the Department of Environmental Quality's National Pollutant Discharge Elimination System (NPDES). The following documents are Benton County's application and permit.
- DOCUMENT MS4 General Permit Issuance Letter
- DOCUMENT MS4 Modified General Permit
- DOCUMENT OR DEQ NPDES Permit Renewal Application Package & Requirements
The following provide geographically-referenced information about the Benton County Stormwater Program and stormwater infrastructure.
- MAP NPDES Boundary Map
- MAP Facilities within City and County Stormwater Conveyance Areas
- MAP Stormwater Program Story Map
- MAP Benton County Stormwater Drainage App
Sections of the Benton County Code that relate to stormwater quality and management.
BENTON COUNTY CODE
- POLICY Chapter 21: Nuisance Abatement
- POLICY Chapter 23: Solid Waste Management
- POLICY Chapter 31: Enforcement
- POLICY Chapter 36: Illicit (Non-Stormwater) Discharges
LAND DEVELOPMENT CODE
- POLICY Chapter 87: Goal 5 Resources
- POLICY Chapter 91: Specific Use Standards
- POLICY Chapter 99: General Development Standards
If you would like to learn more about water quality, check out the following information:
- FLYER Clean Water is Happy Water!
- FLYER Are You Prepared for Stormwater?
- FLYER Stormwater Fall and Winter Tips
- ARTICLE Point and Nonpoint Source Water Pollution
- ARTICLE Watersheds
- ARTICLE Pollutants
- ARTICLE Silt Fences
- ARTICLE Storm Drains
All Benton County employees who perform duties related to erosion and sediment control must be trained on Best Management Practices within 30 days of hire, and should review these materials annually. Public Works staff can also provide in-person training opportunities for staff or departments. Please contact Survey & Engineering.
Clicking on the presentation links will download the Powerpoint presentation. Start the slide show to view the recording, or click SHIFT+F5 to start. This presentation includes narration so please ensure your audio is on.