About flooding in the Sammamish watershed
The Sammamish watershed is the area of land that drains snowmelt and rainwater into Lake Sammamish and then out to Lake Washington. Starting at the mouth and moving upstream, the Sammamish River flows 14 miles from Lake Washington to Lake Sammamish. It passes through the cities of Kenmore, Bothell, Woodinville, and Redmond.
Resources by city
Check your river gage data.
A river gage station is a location where hydrologists, or people who study the flow of water, gather information such as the height and depth of a river and the speed of the water flow.
- Issaquah Creek Gage Data
- Issaquah Creek near Hobart Gage Data
- Issaquah Creek Mouth near Issaquah Gage Data
Want to learn more about creating a flood resilient future in your watershed?
The Cities of Bothell, Woodinville, and Redmond have all invested in restoration projects to improve the ecological and aesthetic conditions along the Sammamish River. Many of the city parks along the river have been improved, including replanting of the riverbanks. Several older bridges have been replaced and others have been newly constructed in recent years. Each new bridge has been designed to divert floodwater away from developed areas.
Flooding along Issaquah Creek in February 2020 caused significant damage to nearby homes and public infrastructure. In response, King County, as service provider to the King County Flood Control District, is working to improve flood resilience with new technical analyses, infrastructure projects and repairs. King County is partnering closely with the City of Issaquah on technical analyses and projects within the City limits.