Lakes Descriptions and Data
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Lake Sawyer
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Welcome
Wilderness
Yellow
Watershed Area
8120 acres
Lake surface area
279 acres
Maximum depth
58 feet
Mean depth
26 feet
Public Park
Yes
Boat Ramp
Yes, outboard restriction
Fish Present
stocked rainbow, bass
Volunteer monitoring began at Lake Sawyer in the 1980s and has continued, with small gaps, through 2008. The data indicate this city lake (Black Diamond) is very lightly colored and currently low to moderate in primary productivity (oligotrophic - mesotrophic) with very good water quality. Productivity appears to have stabilized and remained steady since 1998.
Profile data show thermal stratification is stable through summer, and sedimentary phosphorus release adds a small amount to deep water concentrations. Nitrogen to phosphorus ratios in the upper water during summer are above 20:1, which generally favors other algal species over bluegreens.
Lake Sawyer has a public access boat launch and a history of Eurasian watermilfoil infestation that has not been controlled. Residents should watch aquatic plants growing nearshore for other noxious weeds as well.
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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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Lake Sawyer Community Club
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