Clam River Flowage Lake
Burnett County, Wisconsin359 acresView mapDirections
Wisconsin DNR publishes the water-quality measurements for Clam River Flowage Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- 2 aquatic invasives
- 29 ft max depth
- Public access
- Limited data
Clam River Flowage Lake in Burnett County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2.2 ft visibility. Maximum depth: 29 ft. Surface area: 359 acres.
Wisconsin DNR rates Northern Pike as abundant on Clam River Flowage Lake. DNR survey details →
Clam River Flowage Lake is a 359-acre lake in Burnett County, Wisconsin with a maximum depth of 29 feet. The lake supports 7 documented fish species including Panfish, Largemouth Bass, and Smallmouth Bass. Public access is available.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-08-11. Methodology: how these readings are compared.
What Clam River Flowage Lake is good for
From access and monitoring records, not editorial picks.
- Fishing7 species recorded
- Camping4 public campgrounds nearby
Swimming conditions
No readingRecreation use not supported
Nutrient and algae readings are not a swimming clearance. Clam River Flowage Lake is listed impaired under Clean Water Act §303(d) (IR 5R) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Clam River Flowage 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 Clam River Flowage Lake
These are the measurements Wisconsin DNR publishes for Clam River Flowage Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.2 ft of visibility. TSI 66.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.2ft | 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. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Clam River Flowage Lake
Answers come straight from the public measurements and survey records on this page.
Wisconsin DNR rates Northern Pike as abundant on Clam River Flowage Lake.
A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Clam River Flowage 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 2020).
Fish Species (DNR-rated)
Lake Details
Max depth
29 ft
Surface area
359 acres
Public access
Yes
Listed by Wisconsin DNR
Lake Size & Watershed
Watershed (drainage) area
382 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.2 mi
HydroLAKES / HydroSHEDS
Elevation
899 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
Public campgrounds near Clam River Flowage Lake
- Campground2.1 km
- Riverview Campground2.4 km
- Paint Rock Spring2.8 km
- Logging Trail3.3 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Clam River Flowage Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Clam River Flowage Lake
- → Clam River Flowage Lake fishing: DNR survey catch rates, species & stocking
- → Clam River Flowage Lake fishing forecast & best times (species outlook + 14-day solunar calendar)
- → Clam River Flowage Lake fishing regulations (limits, seasons, special rules)
- → Is it safe to eat fish from Clam River Flowage 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)
Clam River Flowage Lake is a man-made reservoir impounded by the Clam River (completed 1944), built primarily for hydroelectric on the Clam River; gravity-type dam, 46 ft tall and 1,223 ft long.
- Surface area
- 360 ac
- Normal storage
- 3,825 ac-ft
- Max storage
- 3,825 ac-ft
- Drainage area
- 380 sq mi
- Hazard class
- Low
- Owner
- Northwestern Wisconsin Electric Company
All listed purposes: Hydroelectric;Fish and Wildlife Pond;Recreation.
Source: USACE National Inventory of Dams, NID ID WI00004 · Operator website
EPA Impairment Status
Clam River Flowage Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5R).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit WI10005201 · Official waterbody report
Nearby Lakes in Burnett County
Frequently asked questions about Clam River Flowage Lake
Where is Clam River Flowage Lake?
- Clam River Flowage Lake is a lake in Burnett County, Wisconsin. Its water-quality measurements are published by Wisconsin DNR and shown on this page as reported.
What is the water quality of Clam River Flowage Lake?
- Clam River Flowage Lake in Burnett County, Wisconsin has water-quality measurements published by Wisconsin DNR, shown here as reported. Water clarity: 2.2 ft visibility. Maximum depth: 29 ft. Surface area: 359 acres.
Is Clam River Flowage Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Clam River Flowage Lake is listed impaired under Clean Water Act §303(d) (IR 5R) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
How deep is Clam River Flowage Lake?
- Clam River Flowage Lake has a maximum depth of 29 feet. The lake covers 359 acres.
What fish are in Clam River Flowage Lake?
- Fish species found in Clam River Flowage Lake include Panfish, Largemouth Bass, Smallmouth Bass, Northern Pike, Walleye, Sturgeon, Catfish. Clam River Flowage Lake is located in Burnett County, Wisconsin.
What did the DNR fisheries survey find at Clam River Flowage Lake?
- Wisconsin DNR rates Northern Pike as abundant on Clam River Flowage Lake. A DNR fisheries survey reports fish abundance and catch rates, not water quality. LakeQuality shows Clam River Flowage Lake’s water-quality measurements separately. Catch rate is not a swim clearance and is not a weekly bite report.
Can I fish at Clam River Flowage Lake?
- Public access to Clam River Flowage 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.
Are there campgrounds on Clam River Flowage Lake?
- Clam River Flowage Lake has 4 public campgrounds from USGS The National Map within 5 km, including Campground, Riverview Campground, Paint Rock Spring, Logging Trail. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Clam River Flowage Lake across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX3 samples · 2020
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
Public campgrounds from USGS The National Map Structures, within about 3 miles