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F

Current Lake Marsh

Murray County, MinnesotaLimited DataHypereutrophic

On the LakeGrade rubric Current Lake Marsh fails the cutoffs — a TSI of 73 and persistent algal pressure put it in the bottom tier.

Hypereutrophic conditions mean the lake is operating at the upper end of the productivity scale, with all the bloom risk that implies. The lake's maximum depth is not yet documented in state morphometric records — context for its physical structure remains limited. The lake is compact at 73 acres, with partial shoreline records and little volume to buffer nutrient inputs. Current Lake Marsh ranks 2 of 2 in Murray County — at the lower end of the locally monitored distribution.

Current Lake Marsh has no invasive species recorded in Minnesota state databases as of 2022, though prevention practices still apply at all access points. The state fisheries records do not list documented species for Current Lake Marsh, which usually reflects a lack of formal fisheries survey work rather than an empty lake. No formal public access is documented at Current Lake Marsh — most use is by shoreline residents and their guests. Monitoring depth is thin here: the LakeGrade rubric is applied to a small number of sample years, and the grade will be revised as more data accumulates.

Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-08-24. Grade methodology: LakeGrade methodology.

Reviewed by LakeQuality Editorial Team · Updated

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Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.3 ft of visibility. Trophic State Index: 73.

MetricValueGrade
Water Clarity (Secchi Depth)1.3 ftF
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)73Hypereutrophic

Very high nutrients, dense algae, poor clarity

Lake Details

CharacteristicValue
Surface Area73 acres
Public AccessNo

Location

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County Ranking

Ranked #2 of 2 lakes in Murray County

Cleaner Lakes Within 30 Miles

Current Lake Marsh holds Grade F. 2 nearby lakes hold higher grades.

Nearby Lakes in Murray County

Hypereutrophic Lakes in Minnesota

Reservoir Info (USACE NID)

Current Lake Marsh is a man-made reservoir impounded by the Hjermstad Slough Wma (completed 2008), built primarily for fish and wildlife pond on the County Ditch 48; other-type dam, 8 ft tall.

Surface area
73 ac
Normal storage
195 ac-ft
Max storage
195 ac-ft
Drainage area
0.59 sq mi
Hazard class
Low
Owner
MNDNR-Wildlife

Source: USACE National Inventory of Dams, NID ID MN01438 · Operator website · Matched by proximity (0.71 km)

EPA Impairment Status

Current Lake Marsh is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).

Causes of impairment

Impaired biota (cause unknown)Nutrients (phosphorus, nitrogen)

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

Source: EPA ATTAINS assessment unit MN51-0082-00 · Official waterbody report · Matched by proximity (1.17 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

Lake details from Minnesota DNR LakeFinder

Most recent sample: 2022-08-24

Monitoring stations: 2