Rothwell Lake
Randolph County, WisconsinEutrophic
Rothwell Lake is a 26-acre productive, nutrient-rich eutrophic lake in Randolph County, MO. Water quality is graded C based on 3 sampling years through 2024. Compared to the 6 other monitored lakes in Randolph County, Rothwell Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-09-17. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 3.6 ft. Phosphorus level: 32 µg/L. Chlorophyll-a: 14.2 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.6 ft | D |
| Phosphorus | 32 µg/L | C |
| Chlorophyll-a (Algae) | 14.2 µg/L | C |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 26 acres |
Location
County Ranking
Ranked #2 of 7 lakes in Randolph County
Nearby Lakes in Randolph County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Warren County · Clarity: 3.8 ft
Ralls County · Clarity: 3.7 ft
Warren County · Clarity: 3.3 ft
Platte County · Clarity: 4.7 ft
Barry County · Clarity: 5 ft
Phelps County · Clarity: 4.9 ft
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Rothwell Lake is a man-made reservoir impounded by the Rothwell Lake Dam (completed 1902), built primarily for recreation on the TRIBUTARY TO SWEET SPRING CRK; earth-type dam, 29 ft tall.
- Surface area
- 26 ac
- Normal storage
- 156 ac-ft
- Max storage
- 403 ac-ft
- Drainage area
- 458 sq mi
- Hazard class
- High
- Owner
- MOBERLY PARKS & RECREATN
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID MO10004 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-09-17
Monitoring stations: 1