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Henneman Lake
Enhanced dataInteractive depth contours
Henneman LakeChippewa County, WI
Contours load with map Access
Interactive depth contours5-foot typical interval · Sonar-derived depth (C-MAP Genesis) · Gaps interpolated · Not for navigation
Source: C-MAP Genesis community sonar (derived)high confidence · QA passed · Select a contour to inspect its mapped depthDepths decoded from C-MAP Genesis Social Map community sonar recordings (used with permission), covering 92% of the lake. Small gaps between recordings are smoothly connected; larger unrecorded areas follow the lake's depth model calibrated to the DNR-documented 59-ft maximum depth. More accurate than a pure model, but still an estimate. Not for navigation.LakeList assistant
Plan your lake day
Fishing spots, food, lodging, marinas, and rentals around Henneman Lake.
Start here
Fishing forecast
Best windows for Henneman Lake
Weather-based planning built from the National Weather Service hourly forecast near this lake.
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Checking wind, precipitation, and near-term weather windows.
Water temperature
Henneman Lake water temperature today
Modeled surface-temperature estimate built from seasonal climate, lake depth, and live National Weather Service air temperatures near this lake.
72°FWarm
Seasonal estimate. Checking current National Weather Service air temperatures…
Comfortable summer pattern. Bass and panfish are active; early and late hours beat the midday heat.
Estimates are modeled, not measured. Actual temperatures vary with depth, wind mixing, and recent weather — verify conditions before swimming, boating, or heading onto ice.
DNR water check
Water quality quick take
Historical volunteer-monitoring record for this lake.
Last sampled Jul 2001Volunteer monitoring 1994–2001
DNR volunteers monitored this lake for about 7 years, ending in 2001. In 2001 the water showed slight haze water (~8.2 ft Secchi), low algae (chlorophyll ~5 µg/L), and low nutrients (phosphorus ~13 µg/L). After 25 years without samples, these readings describe the lake as it was, not as it is.
| Year | Secchi | Chlorophyll-a | Total phosphorus |
|---|---|---|---|
| 2001 | 8.2 ft (1) | 5.0 µg/L (1) | 13.0 µg/L (1) |
| 1996 | 3.9 ft (1) | 14.0 µg/L (1) | 14.0 µg/L (1) |
| 1994 | 11.8 ft (1) | 3.0 µg/L (1) | 5.0 µg/L (1) |
Henneman Lake - Middle OfStation 093144
Historical record only — no current water-quality data exists for this lake. LakeList verified 2026-07-12.Official Wisconsin information
Plan with DNR sources
LakeList links to the authoritative record so you can verify maps, rules, and current notices before leaving.
Historical DNR depth maps3 converted map sheetsView DNR depth mapHistorical map · not for navigationFishing regulationsVerify current seasons, limits, and restrictionsOfficial DNR lake pageFacts, advisories, boating, and water qualityWater quality reportsMonitoring stations, clarity, and DNR reportsInvasive speciesVerified, observed, and historical AIS recordsBoating ordinancesLocal slow-no-wake and water-use restrictionsFish consumption advisoriesStatewide and waterbody-specific health guidance
Historical depth maps are not for navigation. Verify regulations and access at the official source before your trip.
Historical Wisconsin DNR maps
Henneman Lake depth maps
3 converted map sheets. These historical surveys are not for navigation.
Navigable depth map
Henneman Lake · sheet 3
Pan, zoom, and inspect the converted Wisconsin DNR historical map image in the browser. Historical survey — not for navigation.
Source: Wisconsin DNR · WBIC 2352500 · image navigation only; spatial alignment pending · Historical lake maps are not for navigation.
Source: Wisconsin Department of Natural Resources. Converted for browser access with source URLs, checksums, and retrieval dates retained. Historical lake maps are not for navigation.
69surface acres
59max depth feet
1public access points
45.2575, -91.3691latitude, longitude
Access
Public access points
Boat launchHenneman Lake Access45.26036, -91.36694Managed by STATE(DNR)TOWN OF SAMPSONRamp surface: GravelADA-accessible feature: NoVerified 2026-07-12
Nearby
Trip-planning places
No nearby trip-planning places yet
Fishery
Notable species
Largemouth BassPanfishTrout
Wisconsin DNR stocking
Fish stocking history
The latest published year is 2025, when 16,473 fish were recorded across 4 entries.
2025
Rainbow TroutErwin · Adult (Broodstock-Age-2Yr)
15011.1 in average
2025
Rainbow TroutErwin · Adult (Broodstock-Age-3Yr)
20018.1 in average
2025
Rainbow TroutErwin · Large Fingerling
9,2386.3 in average
2025
Rainbow TroutErwin · Yearling
6,8858.3 in average
2024
Rainbow TroutErwin · Adult (Broodstock-Age-2Yr)
11011.1 in average
2024
Rainbow TroutErwin · Adult (Broodstock-Age-3Yr)
21018.1 in average
2024
Rainbow TroutErwin · Yearling
3,4358.8 in average
2023
Rainbow TroutErwin · Adult (Broodstock-Age-2Yr)
12011.1 in average
2023
Rainbow TroutErwin · Adult (Broodstock-Age-3Yr)
10018.1 in average
2023
Rainbow TroutErwin · Yearling
3,0929.1 in average
2022
Rainbow TroutErwin · Adult (Broodstock-Age-2Yr)
13011.1 in average
2022
Rainbow TroutErwin · Adult (Broodstock-Age-3Yr)
40018.3 in average
Showing the 12 most recent records from 36 published entries.
Depth FAQ
How deep is Henneman Lake?
Henneman Lake is 59 feet deep at its deepest point, according to Wisconsin DNR records.
Is there a free depth map of Henneman Lake?
Yes. LakeList publishes a free interactive depth contour map of Henneman Lake at a typical 5-foot interval, with an optional 3D underwater view, derived from C-MAP Genesis community sonar (derived) survey data.
Where does the Henneman Lake depth map come from?
The interactive depth contours are derived from C-MAP Genesis community sonar (derived). Each contour set passes a visual QA review against the source document before it is published. The depths are derived from community sonar recordings (C-MAP Genesis Social Map, used with permission), with gaps between recordings interpolated; not for navigation.
Trust and freshness
Where this lake data comes from
Wisconsin DNR Lake Mapsname, coordinates, county, source identifiers
LakeList record updated 2026-07-14