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LakeQuality
C

Lucy Lake

Carver County, MinnesotaEutrophic

Lucy Lake earns a C — middle-of-the-pack water quality, with one or two parameters dragging the average down from a stronger grade. Clarity, phosphorus, and chlorophyll-a all rate similarly, so there is no obvious single lever to pull on watershed management.

A TSI in the eutrophic range signals a lake doing what nutrient-loaded waters do — supporting an active algal community at the cost of clear water. Lucy Lake reaches 20 ft at its deepest point — typical for Minnesota mid-sized lakes, with seasonal stratification but limited cold-water refuge. At 88 acres, Lucy Lake sits below the Minnesota median: a small water where shoreline activity has an outsized effect on water quality. Lucy Lake ranks 17 of 40 in Carver County — solidly in the upper half of the local distribution.

Eurasian watermilfoil is established at Lucy Lake, which can dampen recreational access and pressure the native plant community. The fishery is panfish-dominated — bluegill, crappie, and sunfish among the 9 species documented for the lake. No formal public access is documented at Lucy Lake — most use is by shoreline residents and their guests. The grade is based on limited monitoring — fewer than three independent measurement years contribute, so future updates may shift the letter.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-09-13. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 5.6 ft. Phosphorus level: 46 µg/L. Trophic State Index: 56.

MetricValueGrade
Water Clarity (Secchi Depth)5.6 ftD
Phosphorus46 µg/LC
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)56Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth20 ft
Surface Area87.53 acres
Shoreline Length2.3 mi
Littoral Zone98%
Public AccessNo

Fish Species

Click a species to see all Minnesota and Wisconsin lakes where it is found.

→ Best fishing times for Lucy Lake (14-day solunar calendar)

→ Is it safe to eat fish from Lucy Lake? (mercury & PFAS guide)

Lucy Lake fishing regulations (limits, seasons, special rules)

Invasive Species

Eurasian watermilfoil

Water Quality Trend: Improving

Based on 5 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.024 m/yr5
Phosphorus Improving-2.57 µg/L/yr3

Location

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County Ranking

Ranked #17 of 40 lakes in Carver County

Nearby Lakes in Carver County

DNR Fisheries Survey Summary

3 surveys on file from MN DNR Fisheries. Most recent: 2012-06-13 (Standard Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill34.120.2 lb
Pumpkinseed18.510.09 lb
Yellow Bass7.300.45 lb
Northern Pike6.542.41 lb
Black Bullhead4.200.67 lb
Hybrid Sunfish2.820.25 lb

CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.

Length Distributions

Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.

Bluegill

339 fish · 29 in · 2012-06-13
110550trophy 1023456789

Pumpkinseed

22 fish · 46 in · 2012-06-13
1050456

Yellow Bass

39 fish · 513 in · 2012-06-13
14705678910111213

Northern Pike

56 fish · 1034 in · 2012-06-13
63010121416182022242628303234

From the 2012-06-13 survey

Lucy is a small, productive, 92-acre lake located in Chanhassen, Carver County. The lake has been subject to periodic partial winterkills, and, as a result, fish populations have fluctuated, at times dramatically. Most recently, oxygen was low enough in the winter of 2010-11 to induce another partial winterkill.…

Source: MN DNR LakeFinder Fisheries Lake Survey

DNR Reports & Resources

Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Lucy Lake. 1 report on file.

Data Sources

Water quality data from the EPA Water Quality Portal

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2023-09-13

Monitoring stations: 1