Deer River Flow Lake
Franklin County, New York403 acresView mapDirections
NY DEC publishes the water-quality measurements for Deer River Flow Lake. Here is what has been measured.
- 57 ft max depth
- Limited data
Deer River Flow Lake in Franklin County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 3.3 ft visibility. Surface area: 403 acres.
Deer River Flow Lake is a 403-acre lake in Franklin County, New York with an estimated average depth of about 57 feet.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-26. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Deer River Flow Lake is safe to swim in today is a call for the New York Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Deer River Flow Lake
These are the measurements NY DEC publishes for Deer River Flow 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 3.3 ft of visibility. TSI 60.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.3ft | 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. | 60 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Deer River Flow Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~57 ft est.
Surface area
403 acres
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. New York has not published bathymetry for Deer River Flow Lake.
Lake Size & Watershed
Watershed (drainage) area
24 sq mi
HydroLAKES / HydroSHEDS
Shoreline
7 mi
HydroLAKES / HydroSHEDS
Elevation
1,447 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
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Fishing Deer River Flow Lake
Reservoir Info (USACE NID)
Deer River Flow Lake is a man-made reservoir impounded by the Deer River Flow Dam (completed 1904), built primarily for recreation on the DEER RIVER; concrete-type dam, 10 ft tall and 300 ft long.
- Surface area
- 403 ac
- Normal storage
- 1,344 ac-ft
- Max storage
- 1,344 ac-ft
- Drainage area
- 28.3 sq mi
- Hazard class
- Low
- Owner
- NYS DEC
Source: USACE National Inventory of Dams, NID ID NY01115 · Operator website
Nearby Lakes in Franklin County
Frequently asked questions about Deer River Flow Lake
Where is Deer River Flow Lake?
- Deer River Flow Lake is a lake in Franklin County, New York. Its water-quality measurements are published by NY DEC and shown on this page as reported.
What is the water quality of Deer River Flow Lake?
- Deer River Flow Lake in Franklin County, New York has water-quality measurements published by NY DEC, shown here as reported. Water clarity: 3.3 ft visibility. Surface area: 403 acres.
Is Deer River Flow Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Deer River Flow Lake?
- No published bathymetric survey covers Deer River Flow Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 57 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 403 acres.
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Where this data comes from
8 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS8 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
Lake size & watershed from HydroLAKES (HydroSHEDS)