Bob Johnson Lake
Yukon-Koyukuk County, Alaska2,197 acresView mapDirections
No nutrient or algae sampling on record from Alaska DEC for this lake.
- 68 ft mean depth (modelled)
Bob Johnson Lake in Yukon-Koyukuk County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 2197 acres.
Bob Johnson Lake is a 2,197-acre lake in Yukon-Koyukuk County, Alaska with an estimated average depth of about 68 feet.
Source: EPA Water Quality Portal sampling records, your state environmental agency. Methodology: how these readings are compared.
What Bob Johnson Lake is good for
From access and monitoring records, not editorial picks.
- Big water2,197 acres
Swimming conditions
No readingNot rated
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Bob Johnson Lake is safe to swim in today is a call for the Alaska Department of Environmental Conservation and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Bob Johnson Lake
These are the measurements Alaska DEC publishes for Bob Johnson Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. TSI undefined.
Ask about Bob Johnson Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Mean depth
~68 ft est.
Surface area
2,197 acres
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Alaska has not published bathymetry for Bob Johnson Lake.
Lake Size & Watershed
Watershed (drainage) area
28 sq mi
HydroLAKES / HydroSHEDS
Mean depth
~68 ft est.
Modelled from terrain, not sounded
Shoreline
14.5 mi
HydroLAKES / HydroSHEDS
Elevation
1,640 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 Bob Johnson Lake
Nearby Lakes in Yukon-Koyukuk County
Frequently asked questions about Bob Johnson Lake
Where is Bob Johnson Lake?
- Bob Johnson Lake is a lake in Yukon-Koyukuk County, Alaska. Its water-quality measurements are published by Alaska DEC and shown on this page as reported.
What is the water quality of Bob Johnson Lake?
- Bob Johnson Lake in Yukon-Koyukuk County, Alaska has water-quality measurements published by Alaska DEC, shown here as reported. Surface area: 2197 acres.
Is Bob Johnson Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Bob Johnson Lake?
- No published bathymetric survey covers Bob Johnson Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 68 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 2197 acres.
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Where this data comes from
Measurements for Bob Johnson Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)