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Vital Statistics

Watershed Area 471 acres
Lake surface area 7 acres
Maximum depth 30 feet
Mean depth feet
Public Park Yes
Boat Ramp No
Fish Present


Volunteers began monitoring water quality for this lake in the City of Kirkland in 2006, continuing through 2014. The lake has moderately colored water and has some buffering capacity against pH change. It has medium to high in primary productivity (threshold eutrophic), with fair water quality. Productivity may be decreasing over time, as well as phosphorus content, but the trends are weak statistically . Thermal stratification is stable in summer, and sediments release phosphorus to deep water, where large ammonia build-up signals lack of oxygen. Nitrogen to phosphorus ratios are frequently near or below 25:1, which can favor cyanobacteria, although no toxic events have been identified to-date. Although there is no public boat ramp, the public has access to the lake for recreation. Lake users and residents should watch for introduction of new aquatic weeds to the lake.

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Bathymetry map unavailable
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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