Stormwater

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*****ATTENTION*****
 
All stormwater and drainage improvements shall be planned, designed, permitted, constructed, and maintained in accordance with the requirements of the latest version of the Washington Department of Ecology Stormwater Management Manual for Eastern Washington (SWMMEW), which is hereby adopted by reference, including all State’s amendments and modifications thereto as adopted by the Washington State Department of Ecology as authorized by RCW 35A.12.40. The Technical Requirements outlined in Appendix 1 of the Eastern Washington Phase II Municipal Stormwater Permit shall also apply to all new development and redevelopment sites. 

Please note that all public and private stormwater facility calculations and designs shall be prepared by, and require the approval and stamp of, a Civil Engineer who has a current license and registration in the State of Washington.
 
              DISCUSSION CONCERNING THE ADOPTION OF THE SWMMEW WILL OCCUR AT THE JULY 25, 2016 CITY COUNCIL WORKSHOP MEETING.
                                 FINAL APPROVAL OF THE ADOPTION IS PLANNED FOR AT THE AUGUST 1, 2016 CITY COUNCIL REGULAR MEETING.


Rain and snowmelt that collects on impervious surfaces like roofs, roads and parking areas, becomes stormwater runoff. Runoff that reaches our rivers or infiltrates into our groundwater often carries harmful pollutants. Heavy metals, lawn and garden chemicals, animal waste, sediment, petroleum products, and trash are common pollutants found in stormwater. In fact, urban runoff is responsible for more than 60% of the water pollution in Washington State! 
 
Even though Pasco only receives an average of 8 inches of rainfall annually, the pollutant load here can actually be even greater than in cities that receive much more rainfall. That's because the pollutants have a longer time to collect and concentrate on impervious surfaces between our infrequent storm events.

To ensure the health and safety of our citizens and our rivers, the City of Pasco operates a Municipal Separate Storm Sewer System (MS4) under a Phase II Eastern Washington Stormwater Permit (Permit) issued by the state of Washington. The City created a Stormwater Management Program (SWMP) to comply with the requirements of the Permit. The City's annual report documents the steps we've taken to comply with the conditions of the Permit.

The good news is that we can all do something to help to keep our stormwater clean

If you are having problems with road drainage, blocked storm drains, property or basement flooding, or to report illicit discharges to the City's stormwater system please call the STORMWATER HOTLINE at 509-543-5777

TECHNICAL QUICK LINKS
City of Pasco Standards & Specifications
Stormwater Management Manual for Eastern Washignton
Eastern Washington Low Impact Development (LID) Guidance Manual