Twin Falls Flowage Us Twin Falls Dam Lake
Florence County, Wisconsin570 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Twin Falls Flowage Us Twin Falls Dam Lake. Here is what has been measured.
- Impaired · Mercury
- 2 aquatic invasives
- 50 ft max depth
- Public access
- Limited data
Twin Falls Flowage Us Twin Falls Dam Lake in Florence County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7 ft visibility. Maximum depth: 50 ft. Surface area: 570 acres.
Wisconsin DNR lists Panfish as common on Twin Falls Flowage Us Twin Falls Dam Lake. DNR survey details →
Twin Falls Flowage Us Twin Falls Dam Lake is a 570-acre lake in Florence County, Wisconsin with a maximum depth of 50 feet. The lake supports 6 documented fish species including Musky, Panfish, and Largemouth Bass. Public access is available.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2023-07-21. Methodology: how these readings are compared.
What Twin Falls Flowage Us Twin Falls Dam Lake is good for
From access and monitoring records, not editorial picks.
- Fishing6 species recorded
- Deep water50 ft surveyed max depth
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Twin Falls Flowage Us Twin Falls Dam Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Twin Falls Flowage Us Twin Falls Dam Lake is safe to swim in today is a call for the Wisconsin Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Twin Falls Flowage Us Twin Falls Dam Lake
These are the measurements Wisconsin DNR publishes for Twin Falls Flowage Us Twin Falls Dam Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 7 ft. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Twin Falls Flowage Us Twin Falls Dam Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR lists Panfish as common on Twin Falls Flowage Us Twin Falls Dam Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Twin Falls Flowage Us Twin Falls Dam Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
WI DNR Lake Profile
Authoritative data from the Wisconsin DNR LakePages. 2 stations on file (most recent sample 2023).
Fish Species (DNR-rated)
DNR Reports & Resources
Wisconsin DNR Fisheries scientists publish multi-year survey reports for Twin Falls Flowage Us Twin Falls Dam Lake covering fish populations, stocking, water quality, and management. 1 report on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- 2016Twin Falls Flowage comprehensive survey 2016Comprehensive Survey · WI DNR · 2016 (PDF)
Lake Details
Max depth
50 ft
Surface area
570 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
1,798 sq mi
HydroLAKES / HydroSHEDS
Shoreline
20.7 mi
HydroLAKES / HydroSHEDS
Elevation
1,106 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Twin Falls Flowage Us Twin Falls Dam Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Twin Falls Flowage Us Twin Falls Dam Lake
- → Twin Falls Flowage Us Twin Falls Dam Lake fishing: DNR survey catch rates, species & stocking
- → Twin Falls Flowage Us Twin Falls Dam Lake fishing forecast & best times (species outlook + 14-day solunar calendar)
- → Twin Falls Flowage Us Twin Falls Dam Lake fishing regulations (limits, seasons, special rules)
- → Is it safe to eat fish from Twin Falls Flowage Us Twin Falls Dam Lake? (mercury & PFAS guide)
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Reservoir Info (USACE NID)
Twin Falls Flowage Us Twin Falls Dam Lake is a man-made reservoir impounded by the Twin Falls Auxiliary Spillway (completed 1960), built primarily for hydroelectric on the Menominee River; concrete-type dam, 30 ft tall and 101 ft long.
- Surface area
- 960 ac
- Normal storage
- 9,750 ac-ft
- Max storage
- 9,750 ac-ft
- Drainage area
- 1,790 sq mi
- Hazard class
- High
- Owner
- Wisconsin Electric Power Company
All listed purposes: Hydroelectric;Recreation.
Source: USACE National Inventory of Dams, NID ID MI00143 · Operator website · Matched by proximity (0.22 km)
EPA Impairment Status
Twin Falls Flowage Us Twin Falls Dam Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit WI10026672 · Official waterbody report
Nearby Lakes in Florence County
Frequently asked questions about Twin Falls Flowage Us Twin Falls Dam Lake
Where is Twin Falls Flowage Us Twin Falls Dam Lake?
- Twin Falls Flowage Us Twin Falls Dam Lake is a lake in Florence County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Twin Falls Flowage Us Twin Falls Dam Lake?
- Twin Falls Flowage Us Twin Falls Dam Lake in Florence County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 7 ft visibility. Maximum depth: 50 ft. Surface area: 570 acres.
Is Twin Falls Flowage Us Twin Falls Dam Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Twin Falls Flowage Us Twin Falls Dam Lake is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Twin Falls Flowage Us Twin Falls Dam Lake?
- Twin Falls Flowage Us Twin Falls Dam Lake has a maximum depth of 50 feet. The lake covers 570 acres.
What fish are in Twin Falls Flowage Us Twin Falls Dam Lake?
- Fish species found in Twin Falls Flowage Us Twin Falls Dam Lake include Musky, Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye. Twin Falls Flowage Us Twin Falls Dam Lake is located in Florence County, Wisconsin.
What did the DNR fisheries survey find at Twin Falls Flowage Us Twin Falls Dam Lake?
- Wisconsin DNR lists Panfish as common on Twin Falls Flowage Us Twin Falls Dam Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Twin Falls Flowage Us Twin Falls Dam Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Twin Falls Flowage Us Twin Falls Dam Lake?
- Public access to Twin Falls Flowage Us Twin Falls Dam Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Wisconsin's fish and wildlife agency, so check its current regulations before you go.
Explore Twin Falls Flowage Us Twin Falls Dam Lake across LakeQuality
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Where this data comes from
1 measurement from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX1 sample · 2023
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Fish and recreation data from Wisconsin DNR Lakes