Qacmainstfbk Lake
Mercer County, WisconsinMesotrophic
Qacmainstfbk Lake is a 133,000-acre mesotrophic lake in Mercer County, ND. Water quality is graded A based on 2 sampling years through 2020. Compared to the 4 other monitored lakes in Mercer County, Qacmainstfbk Lake ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2020-10-22. Grade methodology: LakeGrade methodology.
Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
No clarity data. Phosphorus level: 10 µg/L. Chlorophyll-a: 7 µg/L. Trophic State Index: 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | 10 µg/L | A |
| Chlorophyll-a (Algae) | 7 µg/L | B |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 133.0K acres |
Location
County Ranking
Ranked #2 of 5 lakes in Mercer County
Nearby Lakes in Mercer County
More Wisconsin Lake Rankings
Other Grade A Lakes in Wisconsin
Mesotrophic Lakes in Wisconsin
Reservoir Info (USACE NID)
Qacmainstfbk Lake is a man-made reservoir impounded by the Garrison Dam (completed 1953), built primarily for hydroelectric on the MISSOURI RIVER; earth-type dam, 210 ft tall and 11,300 ft long.
- Surface area
- 133,000 ac
- Normal storage
- 18,500,000 ac-ft
- Max storage
- 26,000,000 ac-ft
- Drainage area
- 180,940 sq mi
- Hazard class
- High
- Owner
- USACE - Omaha District
All listed purposes: Hydroelectric;Irrigation;Navigation;Recreation;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID ND00145 · Operator website · Matched by proximity (0.09 km)
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2020-10-22
Monitoring stations: 1