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About Bellevue City Profile

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Storm and Surface Water

Introduction
	Drainage Basins
	Floodplain Map
	Flood Prevention
	Keeping Waterways Clean
	Peamouth Minnows
	Salmon in the City
	Storm and Surface Water System Plan
	New Zealand Mud Snails
	NPDES Program
	Streams, Lakes and Wetlands
	Stream Team
	West Nile Virus

Drainage Basins

Bellevue has 26 drainage basins – areas of land that each drain to a stream or lake. City staff have prepared fact sheets that offer a snapshot of the built and natural conditions in each drainage basin.

Drainage basins are small watersheds, and have natural boundaries defined by the shape of the land and the flow of the water; smaller watersheds become part of larger watersheds. Each basin in Bellevue eventually drains to either Lake Sammamish or Lake Washington. Bellevue lies within the larger Lake Washington/Cedar/Sammamish watershed that drains to Puget Sound.

Click an area of the map or choose a basin from the dropdown list under the map for detailed stream and land use information for that basin area. This page also has links to citywide maps, data and reports about the surface waters in Bellevue.

Citywide Maps: Streams, Water and Land Use

Neighborhood Projects in Bellevue

Floodplains - FEMA

Forest Canopy - American Forests Bellevue Summary Report

Impervious Surface

Isopluvials - areas of similar rainfall measurements:

2 year 24 Hour Precipitation

10 year 24 Hour Precipitation

100 year 24 Hour Precipitation

LIDAR (Light Detection and Ranging) - topographic view of Bellevue
Salmon and Trout Distribution and Culverts Showing Fish Passage
Rain Gauges, Flow Stations & Regional Stormwater Detention Facilities
Stream Water Quality Assessment - Department of Ecology Map
Interactive Maps - City of Bellevue

Citywide Data and Reports: Streams, Water and Land Use

Regional Detention Facilities Characteristics

Annual Rainfall Analysis

2012

2011

Rainfall - Largest Storms - from the 1980s to the present

Rainfall - Large Storm Frequency - 1995 to the present

Rainfall - Storm Frequency Curves - for the Seattle metropolitan area

Rainfall – Bellevue Precipitation, 1981 to the present

Fish Use of Bellevue Streams

Summer Fish Monitoring Reports

2012

2011

Salmon Spawner Survey Reports

2011

2010

2009

2008

2007

City of Bellevue Streams Biological Assessment 1998-2007

Stream Benthic Index of Biotic Integrity Summary - 1998-2011

Stream Typing Report - Appendix A, Appendix B, How to Use Stream Types
NOTES: Some stream types have changed. The Bellevue Land Use Code defines Type F waters to include all stream segments that “contain fish or fish habitat.” The code further defines fish habitat as “any habitat which is used by any fish at any life stage at any time of the year, including potential habitat likely to be used by fish that could be recovered by restoration or management".

State Stream Numbers

Definitions and Data Sources

Didn't find what you're looking for? Utility Data Request Form

External Links

Water Quality and Department of Ecology Watershed Information

GeoMapNW - Geologic Mapping Studies - interactive local maps of the Puget Sound area

Regional Salmon Conservation - Greater Cedar/Sammamish Watershed (WRIA 8)

Contact Information

Utilities
450 110th Ave. NE
Bellevue, WA 98009
Contact: Kit Paulsen
Phone: 425-452-4861
E-mail: kpaulsen@bellevuewa.gov

Related Links

Department of Ecology Watershed Information External Web Link

Geologic Mapping Studies

Regional Salmon Conservation