Des Moines Creek a Holistic Approach to Watershed Restoration

King County Department of Natural Resources & Parks Presentation Outline • Des Moines Creek Basin Description • Basin Planning Process • Holistic Restoration Approach • Modeling & Assessment • Regulatory Issues • Cost & Schedule Vicinity Map Project Vicinity Map • Located within Cities of SeaTac and Des Moines • Adjacent to SeaTac international airport • 12 miles south of Seattle Des Moines Creek Des Moines Creek Basin Basin area - 5.8 square miles. Two branches, two main tributaries. Three distinct reaches - Plateau, Ravine and Lower. Des Moines Creek Plateau Reach Basin Land Use 1997 1937 Existing Wetland System Wetland Characteristics • 30+ acre wetland with multiple communities • Forested, Scrub/Shrub, and Open water • Emergent areas within existing golf course Ravine Reach • Channel confined and incised to “hardpan”. • Simplified channel has limited pools and wood. • Vegetated corridor through Des Moines Creek Park. • Fish access limited by Marine View Drive and weirs at Treatment plant. • Impaired by regular high flows. Ravine Reach Lower Reach Lower Reaches • Good existing fish habitat (pools, riffles, cover). • Has potential to provide productive habitat. • Fish access limited by Marine View Drive. Fish Use • Historically coho, chum and steelhead had access. • Resident Cutthroat throughout. • Access above MVD severely limited. Existing Problems • Inadequate flow control measures. • Impaired fish habitat. • Downstream flooding. • Reduced summer base flow. • Degraded water quality • Fish passage barrier. Basin Planning Process • City of Des Moines…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]