Clam River Flowage Lake
Clam River Flowage Lake in Burnett County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. 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 →
- Clarity
- 2.2 ft
- Max depth
- 29 ft
- Area
- 359 acres
- Public access
- Yes
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Why Clam River Flowage Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Clam River Flowage Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
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 with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2020-08-11. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Clam River Flowage Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.2 ft of visibility. Trophic State Index: 66.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.2 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 66 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Clam River Flowage Lake
Compare lakeside cabins, hotels, and vacation rentals near Clam River Flowage Lake in Burnett County, Wisconsin — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Clam River Flowage Lake
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Planning a whole trip? See where to stay at Wisconsin’s top lakes →
Wisconsin DNR rates Northern Pike as abundant on Clam River Flowage Lake.
A DNR fisheries survey reports fish abundance and catch rates, not a water-quality grade. LakeQuality does not assign an A–F grade on Clam River Flowage Lake — official chemistry is on file, not a letter. 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
| Characteristic | Value |
|---|---|
| Maximum Depth | 29 ft |
| Surface Area | 359 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Clam River FlowagePublic
- St. Croix State Park #2Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Clam River Flowage Lake
- Campground2.1 km
- Riverview Campground2.4 km
- Paint Rock Spring2.8 km
- Logging Trail3.3 km
- St. Johns Landing4.7 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
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Clam River Flowage Lake
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
Source: EPA ATTAINS assessment unit WI10005201 · Official waterbody report
Graded lakes near Clam River Flowage Lake
Clam River Flowage Lake has no grade, but these lakes within a short drive do.
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. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Clam River Flowage Lake?
- Clam River Flowage Lake in Burnett County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.2 ft visibility. Maximum depth: 29 ft. Surface area: 359 acres.
Is Clam River Flowage Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Clam River Flowage Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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 a water-quality grade. LakeQuality does not assign an A–F grade on Clam River Flowage Lake — official chemistry is on file, not a letter. Catch rate is not a swim clearance and is not a weekly bite report.
Are there boat ramps on Clam River Flowage Lake?
- Clam River Flowage Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Clam River Flowage, St. Croix State Park #2. Public access is listed as yes.
Are there campgrounds on Clam River Flowage Lake?
- Clam River Flowage Lake has 5 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
Depth, room, public access, and the state wake-sport rules
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Species activity outlook by water temperature and season
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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)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated 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
Named boat-access points from the USGS National Boat Ramps inventory
Public campgrounds from USGS The National Map Structures, within about 3 miles