Spring Lake

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Vital Statistics Overview Maps Water Quality Data Related Links

Vital Statistics

Watershed Area	443 acres
Lake surface area	68 acres
Maximum depth	32 feet
Mean depth	19 feet
Public Park	Yes
Boat Ramp	Yes, no gas engines
Fish Present	bass, stocked rainbow

Volunteer monitoring began at Spring Lake in the 1980s and continued, missing only 1995, through 2008, after which it was discontinued. The data indicated this lake was medium in color and moderate in primary productivity (mesotrophic) with good water quality that remained steady over time.

Profile data show thermal stratification was stable through summer, and sedimentary phosphorus release added significantly to deep water concentrations. Nitrogen to phosphorus ratios in the upper water were above 20:1, which generally favors other algal species over bluegreens.

Spring Lake has a public access boat launch, and a moderate infestation of Eurasian milfoil was found in 2001. King County and the community received a grant from Washington Department of Ecology to control noxious weeds.

Maps


This bathymetric map shows contour lines of equal depth, similar to a topographic map would for mountains and valleys		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

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.

Five year water quality trends
A common method of tracking water quality trends in lakes is by calculating the “trophic state index” (TSI) (Carlson, 1977). TSI indicators predict the biological productivity of the lake based on water clarity (Secchi) and concentrations of total phosphorus (TP) and chlorophyll a (Chlor).

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).

Spring Lake

Vital Statistics

Overview

Maps

Water Quality Data

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