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D

Bennett Lake

Ramsey County, MinnesotaEutrophic

Bennett Lake pulls a D on the LakeGrade rubric — phosphorus loading and limited clarity hold it below the Minnesota average. With clarity and phosphorus scored, the sub-grades cluster within a letter of each other, pointing to stable conditions rather than one specific stressor.

Eutrophic conditions are the baseline here: clarity drops noticeably in late summer, and dissolved oxygen near the bottom can become a concern. At only 9 ft deep, Bennett Lake is shallow — wind keeps the water column mixed and sediment resuspension drives phosphorus levels harder to manage. Bennett Lake is small — 29 acres alongside 1.0 miles of shoreline — which makes it sensitive to even modest changes in watershed runoff or recreational pressure. Bennett Lake sits at rank 31 of 49 in Ramsey County, in the lower half of the local distribution.

No invasive species are currently listed at Bennett Lake — the lake remains off the Minnesota infested-waters roster. Bass fishing is part of the appeal: the species list runs to 8, anchored by largemouth and/or smallmouth bass. The lake lacks a documented public access point, so visitor use is limited. 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 2024-09-10. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Swimming not recommended, poor water quality with high algae risk

Water Quality Grade: D, Poor

Murky, only visible to about 5.2 ft. Phosphorus level: 82 µg/L. Trophic State Index: 60.

MetricValueGrade
Water Clarity (Secchi Depth)5.2 ftD
Phosphorus82 µg/LD
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)60Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Maximum Depth9 ft
Surface Area29.04 acres
Shoreline Length1 mi
Littoral Zone98%
Public AccessNo

Fish Species

black bullhead,black crappie,bluegill,green sunfish,hybrid sunfish,largemouth bass,northern pike,pumpkinseed

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

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

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

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

Water Quality Trend: Stable

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

MetricTrendChange/YearYears
Water Clarity Improving+0.152 m/yr5
Phosphorus Declining+4.75 µg/L/yr5
See year-by-year chart →

Location

Loading map…

County Ranking

Ranked #31 of 49 lakes in Ramsey County

Cleaner Lakes Within 30 Miles

Bennett Lake holds Grade D. 5 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Ramsey County

DNR Fisheries Survey Summary

8 surveys on file from MN DNR Fisheries. Most recent: 2016-06-06 (Targeted Survey).

Top Species by Catch Rate

SpeciesAvg CPUEAvg Weight
Bluegill103.390.1 lb
Black Bullhead53.210.39 lb
Yellow Perch20.000.08 lb
Black Crappie15.830.13 lb
Northern Pike5.673.14 lb
GOS5.160.11 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

234 fish · 26 in · 2016-06-06
18593023456

Black Bullhead

9 fish · 611 in · 2016-06-06
42067891011

Yellow Perch

1 fish · 55 in · 2011-06-06
105

Black Crappie

13 fish · 46 in · 2016-06-06
1160456

From the 2016-06-06 survey

Bennett Lake is a popular local fishing resource in Central Park, City of Roseville. The lake is 23 acres in size and has a maximum depth of nine feet. An aeration system located on the east shore prevents winterkill and a fishing pier is located on the west shore. Additionally, there are many points around the lake…

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 Bennett Lake. 2 reports on file.

EPA Impairment Status

Bennett Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).

Causes of impairment

MercuryNutrients (phosphorus, nitrogen)

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MN62-0048-00 · Official waterbody report

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2024-09-10

Monitoring stations: 1