Lake Wappapello Nr. Dam
Wayne County, WisconsinEutrophic
Lake Wappapello Nr. Dam is a 23,200-acre productive, nutrient-rich eutrophic lake in Wayne County, MO. Water quality is graded D based on 3 sampling years through 2024. Compared to the 2 other monitored lakes in Wayne County, Lake Wappapello Nr. Dam ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-08-14. Grade methodology: LakeGrade methodology.
Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 1.8 ft of visibility. Phosphorus level: 50.7 µg/L. Chlorophyll-a: 34.9 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.8 ft | F |
| Phosphorus | 50.7 µg/L | C |
| Chlorophyll-a (Algae) | 34.9 µg/L | F |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 23.2K acres |
Location
County Ranking
Ranked #2 of 3 lakes in Wayne County
Nearby Lakes in Wayne County
More Wisconsin Lake Rankings
Other Grade D Lakes in Wisconsin
St. Louis city County · Clarity: 2.3 ft
Shelby County · Clarity: 3.2 ft
Macon County · Clarity: 1.8 ft
Harrison County · Clarity: 1.7 ft
Stone County · Clarity: 2.3 ft
Knox County · Clarity: 2.1 ft
Eutrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Lake Wappapello Nr. Dam is a man-made reservoir impounded by the Wappapello Dam (completed 1941), built primarily for flood risk reduction on the ST. FRANCIS RIVER; earth-type dam, 114 ft tall and 2,700 ft long.
- Surface area
- 23,200 ac
- Normal storage
- 613,200 ac-ft
- Max storage
- 1,134,600 ac-ft
- Drainage area
- 1,310 sq mi
- Hazard class
- High
- Owner
- USACE - St. Louis District
All listed purposes: Flood Risk Reduction;Other;Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID MO30204 · Operator website · Matched by proximity (0.38 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-14
Monitoring stations: 2