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King County Small Lakes Information and Data

If you have question on this site, please contact Sally Abella
(206) 477-4605.

Lake Alice

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Vital Statistics

Watershed Area 184 acres
Lake surface area 32 acres
Maximum depth 30 feet
Mean depth 8 feet
Public Park N
Boat Ramp Y, no gas engines
Fish Present bass, stocked rainbow


Volunteer monitoring began at Lake Alice in 2000 and continued through 2008. It was discontinued in 2009, but has resumed in 2014. As of 2008, the lake was lightly colored and relatively low in phytoplankton productivity (high oligotrophic to low mesotrophic) with very good water quality. There was an upward trend in productivity from 2000 continuing through 2008, validated statistically.

Thermal stratification was not continuous in summer, and phosphorus released from the sediments did not build up in the deep water. The nitrogen to phosphorus ratio is generally above 20:1, which does not favor bluegreens over other algae.

Lake Alice has a public access boat ramp, and aquatic plants growing around the lake should be tracked to catch early infestations of Eurasian milfoil, Brazilian elodea or other noxious aquatic weeds. There is an established infestation of fragrant water lily at the lake.

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bathymetric map lake watershed map
This bathymetric map shows contour lines of equal depth, similar to a topographic map would for mountains and valleys. The red 'X' marks the location where water quality samples are taken. This map shows the area of the watershed relative to the area of the lake. Generally speaking, the larger a watershed is relative to a lake, the greater the influence land use practices on lake water quality.

Click image to enlarge

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Water Quality Data  

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).

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Reports and Related Links

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