Beaver-3 Lake

Vital Statistics
Overview
Maps
Water Quality Data
Reports and Related Links

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Vital Statistics

Watershed Area	acres
Lake surface area	acres
Maximum depth	feet
Mean depth	feet
Public Park
Boat Ramp
Fish Present

Overview

Beaver Lake south (3RD) basin, off dock at 2821 252nd Ave SE. Last monitored in 2009.

Maps

Bathymetry map unavailable

Watershed map unavailable

Water Quality Data No data in the past 5 years for this lake.

Through a combination of efforts by volunteer lake monitors and King County staff, data relating to physical, chemical, and biological aspects of the lake have been collected for most lakes. The King County Lake Stewardship Program analyzes data to track long-term water quality trends in small lakes in western King County.

View or Download Data
Use this tool to view or download data from the lake in tabular format. You can define date ranges and select which parameters to view or download.

Chart Data
Use the charting tool to look at graphs showing single parameters for a single water year at a time.

Water quality over time
A common method of tracking water quality trends in lakes is by calculating the “trophic state index” (TSI) (Carlson, 1977) and testing the values for positive or negative trends over time. TSI indicators predict the biological productivity of the lake based on water clarity (Secchi) and concentrations of total phosphorus (TP) and chlorophyll a (Chlor). Generally at least 8 years of data without major lake management activities are needed to have confidence in a significant trend.

The average of these three TSI indicators during the growing season can be used to place lakes in one of three broad categories:
<40 = oligotrophic (low productivity),
40 to 50 = mesotrophic (moderate productivity)
>50 = eutrophic (highly productive).

Reports and Related Links

For questions about lakes in King County, please contact lakes@kingcounty.gov or call the Water and Land Resources Division front desk at 206-477-4800.