Stormwater Utility




Jennifer Lange, P.E.

140 19th Street NW
East Wenatchee, WA  98802

Phone: (509) 886-3728

Office Hours: 8:00 am to 5:00 pm

Douglas County Stormwater Utility is interested in your comments and suggestions about our website or in general. We appreciate your taking the time to write to us. Please let us know if there is information that you think should be or would like to have included, and any concerns you may have relating to Stormwater. 
Email questions/comments

Why be concerned with Stormwater?

Stormwater is the concentrated flow of water that runs off property when it rains and flows into streets, storm sewers, and ditches.  Increased impervious areas result when houses or buildings are built on a lot that was previously vegetated.  Driveways, rooftops, parking lots and streets are considered to be impervious surfaces.  


10th Street - June 97

10th Street NE, June 1997

Lyle Street - January 1995

Lyle Avenue, January 1995

How is my utility service charge calculated?

The utilities’ rate structure is based upon the amount of impervious surface area within each parcel or equivalent service units (ESU).

A service charge of $45 per ESU, per year shall be levied against each developed parcel within the service area.

The following are examples of how ESU's are calculated and applied within the service area:

  • Single family residence = one (1) ESU.
  • Duplex = one (1) ESU.
  • Tri-plex / Four-plex = two (2) ESUs.
  • For all other parcels:
    # ESUs = the total square feet of impervious surfaces divided by 2750 square feet. (2750 square feet is the approximate surface area of an average residential rooftop and driveway)
  • No developed parcel shall contain less than one (1) ESU.
  • Undeveloped parcels do not contain ESU’s.
  • Douglas County and East Wenatchee pay for their impervious areas, including streets, roads, trails, and parking lots..


  1. Qualified low-income senior citizens and disabled persons may be eligible for a discount.
  2. In addition storm water facilities designed to accept runoff may be eligible to receive a storm water utility credit.
  3. Rate structure is current as of December 15, 2009.
What do I get from the Stormwater Utility?

The SWU attempts to assure that there will be long term funding to pay for construction, maintenance and repair of stormwater facilities. 

Douglas County’s Comprehensive Flood Hazard Management Plan identifies many capital improvement projects in the Greater East Wenatchee area aimed to mitigate chronic flooding problems.  Multiple projects have been completed to date such as Canyon B channel stabilization, drywell installation and repair in East Wenatchee and the Fancher Heights area, Canyon A culverts at Eastmont/3rd St SE, construction of detention basins at 4th St SE, 10th St. SE, 23rd St NE & 35th St NE, obtaining capacity in a stormwater conveyance system, 27th Street NW to the River.

Stormwater utility funds pay for improving and maintaining the storm drainage system. Improvements to the overall drainage system may have more direct benefits to some, but that does not impact the fairness of the rate or that we all benefit from stormwater management. While your property may not be physically connected to the drainage system, the storm water utility improves and maintains upstream facilities which in turn protects your property. Everybody benefits from the maintenance and improvements provided by the stormwater utility, through an improved environment, better access to roads during storm events, and reduced flooding during abnormal years. Maintenance of the storm drainage system helps to ensure the safety and reliability of the road system within the Stormwater Utility Area. Every developed property benefits from maintenance and improvements to the storm drainage system.

If you are aware of a chronic drainage problem please contact Jennifer Lange at:

140 19th Street NW
East Wenatchee, WA  98802
(509) 886-3728

Wenatchee Valley Stormwater Technical Advisory Committee

In February of 2007, the Washington State Department of Ecology issued the Eastern Washington Phase II Municipal Stormwater Permit to the City of Wenatchee, Chelan County, Douglas County and the City of East Wenatchee. This permit requires each jurisdiction to develop and implement a stormwater program with the goal of reducing the amount of pollution in stormwater.

To share resources and develop a consistent regional stormwater program, representatives from both cities and counties have been working together to meet the requirements of the permit. This group is called the Wenatchee Valley Stormwater Technical Advisory Committee (WVSTAC). Over the next five years the program will be developed and implemented. For the latest information regarding the regional stormwater program, please visit the WVSTAC page.