Stormwater Management Program
Our goal at Marion County is to develop a cost-effective, environmentally sound, and well engineered Stormwater Management Plan that is accepted by DEQ, the public, our Board of Commissioners, and county staff.
This Plan must comply with requirements of NPDES Phase II regulations and be compatible with surrounding jurisdictions.
Stormwater runoff occurs when rain or snowmelt flows over the ground. Hard surfaces like driveways, sidewalks, and streets prevent stormwater from naturally soaking into the ground. This water can pick up debris, chemicals, dirt, and other pollutants and flow into streams or into a storm drains which flows directly into our streams or wetlands.
Polluted stormwater can have many bad effects on people, fish, animals, and plants.
Sediment in the water can destroy fish and insect habitat. Excess nutrients from animal waste and fertilizers can cause algae blooms that deplete oxygen in the water – suffocating fish and insects. Bacteria and other pathogens from garbage and animal waste can make people and animals sick when they are in contact with the water. Litter is unsightly, can plug up the stormwater pipes, and is potentially dangerous to animals. Household waste like motor oil, pesticides, herbicides, paint, and solvents can be very dangerous to people, animals, insects, and fish.
To help deal with the problem of polluted stormwater, the federal Environmental Protection Agency has developed a permit process called the National Pollutant Discharge Elimination System (NPDES). NPDES attempts to reduce polluted stormwater runoff by requiring operators of municipal separate storm sewer systems (MS4s) to implement a series of best management practices (BMPs) to prevent and manage illicit stormwater discharges and other sources of contaminants that reach our streams via stormwater runoff.
Marion County is included in the list of those who must comply under Phase II, because of the East Salem Service District and areas near the Salem Urban Growth Boundary (UGB) that meet the criteria for a small MS4.
Marion County Public Works must continually develop a Stormwater Management Program to meet the requirements of the NPDES phase II permit. Under Phase II the county must determine the appropriate BMPs and program elements needed to meet six minimum control measures outlined by the permit. The six minimum control measures are as follows:
- Public Education and Outreach
- Public Participation and Involvement
- Illicit Discharge Detection and Elimination
- Construction Site Runoff Control
- Post Construction Runoff Control
- Pollution Prevention and Good Housekeeping
Stay tuned to this website to find out more about what Marion County is doing to protect the health of our local waterways through the Stormwater Management Program. If you’d like to get involved in cleaning up the stormwater around Salem, or if you have questions, please contact Kaileigh Westermann-Lewis, MCPW, 503-365-3149.
Stormwater Management Plan
Marion County relies on the feedback of the public. Please review the Stormwater Management Plan and provide comments to:
NEW - Stormwater Quality Treatment Engineering Standards for the Stormwater Management Area
Matt Knudsen, REHS
Marion County Public Works
Stormwater Management Plan