Tawni Dalziel
Tawni Dalziel, P.E./Public Works and Community Development Director




22017 SE Wax Road, Suite 200
P.O. Box 320
Maple Valley, WA 98038
Phone: (425) 413-8800
Fax: (425) 413-4282

8:00 a.m. - 5:00 p.m.
Monday - Friday

After Hours Emergency


The Public Works Department is responsible for the maintenance and operation of the City's streets, sidewalks, traffic signals, stormwater facilities, and vegetation management.

In addition, the Department implements the City-Council-approved Transportation Improvement Program, Non-Motorized Transportation Plan [PDF 14.8 MB], Pavement Maintenance Management Program [PDF], and National Pollutant Discharge Elimination System (NPDES) by providing engineering, project management and technical services.

Vegetation Management FAQ Sheet [PDF]

Contact us with questions. Not sure if Public Works handles it? Check out our Who do I contact guide.




Report Spills and Other Water Quality Issues


Spills and other water quality issues can be reported to the Public Works Department by calling 425-413-8800 during business hours, Monday - Friday, 8:00 a.m. to 5:00 p.m., or 206-391-4212 after hours, weekends, or holidays and/or the Washington Department of Ecology at 1-800-645-7911.

In order to protect water quality, the public is encouraged to report spills and improper disposal, including suspected illicit connections or discharges, into the City’s municipal stormwater system or any body of water in Maple Valley.


Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Download Acrobat Reader Flash Player Download Flash Player Windows Media Player Download Windows Media Player Microsoft Silverlight Download Microsoft Silverlight Word Viewer Download Word Viewer Excel Viewer Download Excel Viewer PowerPoint Viewer Download PowerPoint Viewer