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Lake Allen
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Welcome
Wilderness
Yellow
Watershed Area
230 acres
Lake surface area
11 acres
Maximum depth
Not Available
Mean depth
Not Available
Public Park
N
Boat Ramp
N
Fish Present
Not Available
Volunteer monitoring began at Allen Lake in 1994 and continued through 2008, after which it was discontinued. Throughout that time the lake was strongly colored and consistently high in primary productivity (eutrophic), with fair water quality. There was a persistent downward trend in productivity from 1996 to 2008 that was strongly correlated.
Thermal stratification appeared stable through summer, and sedimentary phosphorus release increased deep water concentrations. Nitrogen to phosphorus ratios were often at or below 20:1, which can favor bluegreen algae in the plankton. No toxic blooms have been identified to date.
Allen Lake does not have a public access boat ramp. However, residents should watch aquatic plant populations to catch early infestations of Eurasian milfoil, Brazilian elodea, or other noxious aquatic weeds.
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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
Back to top 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:
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