Kota Ray Dam Lake
Williams County, WisconsinMesotrophic
Kota Ray Dam Lake is a 28-acre mesotrophic lake in Williams County, ND. Water quality is graded B based on 2 sampling years through 2024. Compared to the 8 other monitored lakes in Williams County, Kota Ray Dam Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-10-03. Grade methodology: LakeGrade methodology.
Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 7.7 ft. Chlorophyll-a: 3.5 µg/L. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.7 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 3.5 µg/L | A |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 27.7 acres |
Location
County Ranking
Ranked #2 of 9 lakes in Williams County
Nearby Lakes in Williams County
More Wisconsin Lake Rankings
Other Grade B Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Kota Ray Dam Lake is a man-made reservoir impounded by the Kota Ray Dam (completed 1933), built primarily for recreation on the Nelson Creek; earth-type dam, 46 ft tall and 880 ft long.
- Surface area
- 27.7 ac
- Normal storage
- 337.7 ac-ft
- Max storage
- 747.1 ac-ft
- Drainage area
- 7.2 sq mi
- Hazard class
- Low
- Owner
- Williams County Hwy Dept.
Source: USACE National Inventory of Dams, NID ID ND00197 · Operator website
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-10-03
Monitoring stations: 1