Stormwater Management

The stormwater management program is a major element of the Port of Olympia's commitment to preventing, reducing and eliminating the discharge of pollutants into Puget Sound. We work closely with port tenants and the Washington Department of Ecology to minimize the potential for pollutants to enter Puget Sound from stormwater runoff flowing off impervious surfaces on port properties.

Federal and state water quality laws require a permit for discharges of rain water and snow melt into surface water (lakes, rivers, ponds, streams, inland waters and salt waters). The purpose of a permit is to control the quantity and/or quality of the water discharged to protect surface water and groundwater.

The Port’s properties are covered by two permits: The Marine Terminal is covered by the Washington’s Industrial Stormwater General Permit, issued by Washington’s Department of Ecology as part of the National Pollutant Discharge Elimination System (NPDES). Other areas of the Port’s property are covered by a Municipal General Stormwater Permit, also issued by the Department of Ecology as part of the NPDES program.

The goal of the permits is to implement and maintain best management practices (BMP’s) that identify, reduce, eliminate and/or prevent the discharge of specific stormwater pollutants into surface water. The Port accomplishes these goals by complying with its Stormwater Management Program (SWMP, for the municipal general permit) and Stormwater Pollution Prevention Plan (SWPPP, for the industrial general permit).

The Port’s stormwater compliance program is implemented by the Port’s Environmental Programs and Engineering Department, in coordination with the Port’s Marine Terminal, Real Estate, and Swantown Marina divisions, as well as with building and grounds maintenance crews, and Port tenants. In compliance with applicable permit requirements, the Port’s SWMP and SWPPP contain the following components:
  • Best management practices to control potential pollutants
  • Spill prevention and control
  • Construction site stormwater runoff control
  • Illicit discharge detection and elimination
  • Pollution prevention / good housekeeping for municipal operations
  • Post-construction stormwater management for new development and redevelopment
  • Public education and outreach.
The Port continually strives to improve and upgrade stormwater management practices and infrastructure on our facilities. Both the industrial and municipal permits are implemented by the Department of Ecology. View Ecology's permitting programs for municipal stormwater and industrial stormwater for more information.

View the Port's Municipal Stormwater Annual Report.
Stormwater Treatment Pond
Stormwater Treatment Facility