Lakes / Michigan / Flat Rock Impoundment
Flat Rock Impoundment, Michigan
3 ft
Max Depth
Where It Sits, and How Deep It Goes
Locator - Michigan
42.10 degrees N, 83.31 degrees W - Wayne County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Michigan DNR coordinates, not by eye. Schematic - not a survey map.
Depth Profile - Flat Rock Impoundment
Schematic cross-section drawn to one shared depth scale - not a survey or bathymetric map.
How Flat Rock Impoundment Stacks Up
- A shallow lake - typical of most Michigan lakes, which run under 20 ft at their deepest.
- About 21 miles from Detroit, as the crow flies.
Facts and Figures
Waterbody ID82-235
CountyWayne
Coordinates42.1049, -83.3077
Deepest Natural Lakes in Michigan
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Torch Lake | Antrim | 18,713 acres | 285 ft |
| 2 | Elk Lake | Antrim | 8,194 acres | 192 ft |
| 3 | Crystal Lake | Benzie | 9,865 acres | 175 ft |
| 4 | Lake Angeline | Marquette | - | 162 ft |
| 5 | Syphon Lake | Luce | 11 acres | 160 ft |
Largest Lakes in Michigan
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Houghton Lake | Roscommon | 20,070 acres | 21 ft |
| 2 | Torch Lake | Antrim | 18,713 acres | 285 ft |
| 3 | Burt Lake | Cheboygan | 17,393 acres | 73 ft |
| 4 | Lake Charlevoix | Charlevoix | 17,256 acres | 120 ft |
| 5 | Mullett Lake | Cheboygan | 16,702 acres | 120 ft |
Sources: Michigan DNR DNRHydrologyOPENDATA (IFR deep points + reference hydro polygons); counties via Census point-in-polygon lake data (ID 82-235). Verified October 30, 2026.