Hidden Lake feasibility study public meeting

Boeing Creek
Photo by Finn Huffstetter

Hidden Lake Feasibility Study public meeting Tuesday, May 6, 6:30pm, Shoreview Park

Learn about the study to identify alternative maintenance options and improve water quality in Hidden Lake and Boeing Creek. 

Overview and History - from the City of Shoreline

Sediment removal at Hidden Lake is the City of Shoreline's largest single stormwater operation and maintenance budget item. The history of Hidden Lake spans nearly a century, from the time Mr. William Boeing first dammed Boeing Creek to create a fishing pond and small hatchery near his estate.

Since then, the area surrounding Hidden Lake has been developed into an established residential community, Shoreline Community College and neighboring parks and open space have been created. The Aurora Avenue Corridor development of the 1960s and 1970s has impacted Boeing Creek through greatly increased stormwater discharges. The geology and topography of the Boeing Creek system is particularly susceptible to erosion and landslides.

Prior to Shoreline’s incorporation in 1995, King County made many attempts to reduce these impacts, including the construction of the M1 dam, channel hardening between M1 and the confluence of the north and south forks of Boeing Creek, and construction of the Boeing Creek Detention Pond.

Modifications on Boeing Creek also include a water supply dam and the railroad crossing at the mouth of the creek. Hidden Lake itself as undergone modifications, with reconstruction in the mid-1990s creating a sedimentation basin that could be dredged as needed to maintain open-water habitat.

The City of Shoreline is conducting the Feasibility Study with the goal to:

1. Identify alternatives that will reduce the net maintenance cost for managing Hidden Lake.
2. Identify capital projects or strategies that can be incorporated in the City’s next 6-year Capital Improvement Program (CIP).
3. Maintain or improve water quality in Hidden Lake and Boeing Creek.