The City of Mountlake Terrace has 2 main surface water drainage courses. Hall Creek, Lake Ballinger and McAleer Creek comprise the main drainage features on the west side of the city. Lyon Creek is the main drainage course on the east side of the city. There are several branches of the creek within the city that all converge into one channel at the Cedar Way Detention facility located in the 23900 block of Cedar Way. Downstream of the detention facility, Lyon Creek enters into the City of Lake Forest Park at the intersection of Cedar Way and 244th St. SW/205th St. SW at the Snohomish/King County border and eventually reaches Lake Washington east of the Lake Forest Park Town Center.
Mountlake Terrace, Lake Forest Park, Shoreline, Brier and Snohomish County will be coordinating efforts to address problems relating to water quality and storm water runoff that can contribute to flooding and property damage in the Lyon Creek Watershed. In preparation for these discussions, Mountlake Terrace has prepared a Synthesis Report of Past Activities accomplished by the city going back to 1969.
The Watershed Basin & Action Plan
The Watershed Basin and Action Plan will promote regional efforts to address stewardship as among the highest environmental priorities in the area. The Mountlake Terrace City Council has directed city staff to continue to collaborate with other cities, Snohomish County, and the State of Washington and the federal government to develop an action plan addressing stewardship issues of Lake Ballinger, McAleer Creek and the streams and lakes that are contained within the greater watershed.