C

Powers Lake Dredge Site

Mountrail County, WisconsinEutrophic

Powers Lake Dredge Site is a productive, nutrient-rich eutrophic lake in Mountrail County, ND. Water quality is graded C based on 2 sampling years through 2024. Compared to the 4 other monitored lakes in Mountrail County, Powers Lake Dredge Site ranks #4 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-05-21. Grade methodology: LakeGrade methodology.

Swimming Safety

Generally safe for swimming, moderate water quality

Water Quality Grade: C, Fair

Murky, only visible to about 3.9 ft. Chlorophyll-a: 10.3 µg/L. Trophic State Index: 55.

Metric	Value	Grade
Water Clarity (Secchi Depth)	3.9 ft	D
Phosphorus	No data
Chlorophyll-a (Algae)	10.3 µg/L	C
Trophic State Index (TSI)	55	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #4 of 5 lakes in Mountrail County

Cleaner Lakes Within 30 Miles

Powers Lake Dredge Site holds Grade C. 4 nearby lakes hold higher grades.

See full comparison →

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Other Grade C Lakes in Wisconsin

Grant County · Clarity: 6 ft

Ramsey County · Clarity: 5.2 ft

Benson County · Clarity: 3.7 ft

Carlson-Tande Dam Lake

Griggs County · Clarity: 5.6 ft

Fordville Dam Lake

Grand Forks County · Clarity: 4.4 ft

Sargent County · Clarity: 5.9 ft

Eutrophic Lakes in Wisconsin

Lake Alice J. Clark Salyer Pool 357 E. A. Patterson Lake Lake Irvine

EPA Impairment Status

Powers Lake Dredge Site is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Nutrients (phosphorus, nitrogen)Oxygen depletion (low DO)Sediment / turbidity

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

Source: EPA ATTAINS assessment unit ND-10110101-001-L_00 · Official waterbody report · Matched by proximity (1.33 km)

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

Most recent sample: 2024-05-21

Monitoring stations: 1