Clear Fork Reservoir
Morrow County, WisconsinLimited DataEutrophic
Clear Fork Reservoir is a 1,024-acre productive, nutrient-rich eutrophic lake in Morrow County, OH. Water quality is graded F based on 1 sampling years through 2021.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2021-10-14. Grade methodology: LakeGrade methodology.
Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 3.1 ft of visibility. Trophic State Index: 61.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.1 ft | F |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 61 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1.0K acres |
Location
County Ranking
Ranked #1 of 1 lakes in Morrow County
Nearby Lakes in Morrow County
More Wisconsin Lake Rankings
Other Grade F Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Clear Fork Reservoir is a man-made reservoir impounded by the Clear Fork Reservoir Dam (completed 1949), built primarily for water supply on the CLEAR FORK MOHICAN RIVER; earth-type dam, 44 ft tall and 3,420 ft long.
- Surface area
- 1,024 ac
- Normal storage
- 10,922 ac-ft
- Max storage
- 26,532 ac-ft
- Drainage area
- 34.67 sq mi
- Hazard class
- High
- Owner
- City of Mansfield
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID OH00778 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2021-10-14
Monitoring stations: 4