Indiana lake depth maps
Big Chapman Lake depth map
Big Chapman Lake in Kosciusko County, Indiana reaches a depth of 35 feet. Big Chapman Lake is charted here across 7 closed depth contours, from the 5 ft line down to 35 ft, enclosing about 296 acres of water. Half of that water lies inside the 20 ft line, and only 6.7 acres lie inside the deepest one. Every contour is on the interactive map below, free and without an account.
Data: Indiana DNR Lake Bathymetry (credit: Indiana DNR). Contours closed, checked and area-computed by Jordan Carter, founder of GilledIt · page updated
Big Chapman Lake depth chart: 7 depth contours from 5 to 35 ft
Data: Indiana DNR Lake Bathymetry (credit: Indiana DNR), retrieved August 2026 · depths change over time · not for navigation
| Depth contour | Water inside it | Share of mapped water |
|---|---|---|
| 5 ft | 296 acres | 100% |
| 10 ft | 229 acres | 78% |
| 15 ft | 200 acres | 68% |
| 20 ft | 147 acres | 50% |
| 25 ft | 67 acres | 23% |
| 30 ft | 28 acres | 9.4% |
| 35 ft | 6.7 acres | 2.2% |
Acreages are computed from the closed Indiana DNR Lake Bathymetry contour rings, with islands subtracted. Shares are of the 296 acres inside the outermost charted contour (the 5 ft line), which is the outer edge of the mapped water, several state files carry no 0 ft shoreline line, so this is not the same as a share of the lake's published surface area.
Fishing Big Chapman Lake: an evenly graded bottom
The survey encloses about 296 acres of Big Chapman Lake inside its 5 ft contour, and half of that water lies inside the 20 ft line, so the bottom falls away at a steady rate rather than shelving off or dropping in one step. Between 20 and 25 ft the mapped water sheds 80 acres in 5 ft of depth, the sharpest change on the chart, start on that band, because it is where the bottom stops being flat. 6.7 acres, 2.2% of the mapped water, lie inside the deepest 35 ft contour, toward the southwestern corner of the lake. With 35 ft at its deepest there is no true cold-water layer here, so structure does the work the thermocline does elsewhere: fish the points and inside turns where the 20 and 25 ft lines pinch together, hardest in early season and again as fish follow bait back down in autumn.
Ice fishing on Big Chapman Lake
Big Chapman Lake's 35 ft is a workable ice depth, enough water to hold fish all winter, without the slow freeze-up of a big basin. First light belongs on the 35 ft hole, all 6.7 acres of it; as the sun gets up, move onto the 20–25 ft break, and spend the middle of the day on the flats inside the 20 ft line. Check ice thickness locally before you walk out.
Big Chapman Lake depth map FAQs
- How deep is Big Chapman Lake?
- Big Chapman Lake reaches a maximum depth of 35 feet in the Indiana DNR Lake Bathymetry survey. Most of it is far shallower: the survey charts 7 closed depth contours over about 296 acres, and half of that water sits inside the 20 ft line.
- Where is the deepest part of Big Chapman Lake?
- The deepest charted water on Big Chapman Lake lies inside the 35 ft contour, toward the southwestern corner of the lake. That contour encloses 6.7 acres, 2.2% of the mapped water, so it is a small target on a small water, the depth chart above gives the contour to line up on.
- How much of Big Chapman Lake is shallower than 20 feet?
- About half. The 20 ft contour encloses 147 acres of the roughly 296 acres inside the outer 5 ft line, so the other half of the water is shallower than 20 feet. The sharpest drop is between 20 and 25 feet, where the mapped water sheds 80 acres.
- How accurate is this Big Chapman Lake depth map?
- The contours come from the Indiana DNR Lake Bathymetry survey, retrieved August 2026 and last rebuilt on August 19, 2026. Depths change over time with water levels and sediment, so treat this map as a planning guide for fishing, and never use it for navigation. Per Indiana DNR, the data are graphical representations for reference only, not a survey instrument. Acreages are computed from the published contour geometry, not from a separate area survey, so read them as close approximations.
Depth maps for lakes near Big Chapman Lake
- Little Chapman Lake depth map · 25 ft max · 1 mi away
- Pike Lake depth map · 30 ft max · 4 mi away
- Big Barbee depth map · 42 ft max · 4 mi away
- Dewart Lake depth map · 70 ft max · 6 mi away
- Shock Lake depth map · 60 ft max · 7 mi away
Mapped fishing venues near Big Chapman Lake
Big Chapman Lake in the venue directory covers access and fishing details for this water.
- Little Chapman Lake · 1 mi away
- Pike Lake · 4 mi away
- Big Barbee · 4 mi away
Fishing in Indiana needs a state license: Indiana fishing license guide · all Indiana venues