|The Public Works Department is responsible for planning and maintaining the Island’s infrastructure. Our department provides an array of services including the delivery of quality water and sewer services, maintaining public storm drains, managing the Island’s right-of-ways (roadways, sidewalks, traffic signals), and other City related City infrastructure.
For a map of major 2018 transportation and utility projects, click here
Our department is responsible for the following functions:
Utilities: The Utilities Team provides quality service for the water and sanitary sewer customers on Mercer Island. The team is responsible for providing safe, effective and efficient water and sewer services to the City’s customers. The Team also assists with snow removal and storm response.
Right-of-Way Maintenance: The Right-of-Way Team maintains Mercer Island rights-of-way, storm drains, walkways and trails to insure a clean, safe and navigable system. The Team also provides snow removal and storm response.
Engineering and Capital Projects: The Engineering Team works to complete utility and street improvements projects on time and on budget and coordinates planning processes that balance the needs of the Island's infrastructure with the best interests of our customers.
Support Services: The Customer Response Team provides essential operational and informational needs that support the Utilities, Right-of-Way and Capital Project Teams, as well as all other City Departments.
General Sewer Plan: In accordance with Washington Administrative Code (WAC 173-240), governmental agencies (cities) providing sewer service are required to have a general sewer plan that demonstrates the agency’s ability to provide service consistent with the requirements of the State. Updates to these plans are necessary when conditions within the City have changed. This new Plan, dated November 2018, is an update of the General Sewer Plan (February 2003).
Click here for a PDF copy of the General Sewer Plan (November 2018).
Public Works Operations
Public Works Staff Directory
Submit a Service Request
Email Public Works
9601 SE 36th Street
Mercer Island, WA 98040
After-Hours Non-Emergency Issues:
Power Outage Information:
(Puget Sound Energy)
Monday - Friday
7:30 am – 3:30 pm