Lakes / Pennsylvania / Mammoth Dam
Mammoth Dam, Pennsylvania
27 acres
Surface Area
1,013 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Pennsylvania
40.21 degrees N, 79.46 degrees W - Westmoreland County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Pennsylvania Fish and Boat Commission coordinates, not by eye. Schematic - not a survey map.
How Mammoth Dam Stacks Up
- About 32 miles from Pittsburgh, as the crow flies.
- 12 fish species on the Fish and Boat Commission list for this lake.
Fish Species
Largemouth BassBlack CrappieWhite CrappieYellow PerchBluegillRainbow TroutPumpkinseedBrown BullheadCommon CarpGolden ShinerWhite SuckerYellow Bullhead
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID401245792730
CountyWestmoreland
Fishing IncludesLargemouth Bass, Black Crappie, White Crappie, Yellow Perch, Bluegill
Stocked TroutYes - stocked by the Pennsylvania Fish and Boat Commission
Coordinates40.2138, -79.4557
Deepest Natural Lakes in Pennsylvania
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Struble Lake | Chester | 146 acres | 19 ft |
Largest Lakes in Pennsylvania
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Pymatuning Reservoir | Crawford | 13,920 acres | About 25 ft |
| 2 | Allegheny Reservoir | Warren | 12,081 acres | 128 ft |
| 3 | Raystown Lake | Huntingdon | 8,297 acres | None |
| 4 | Lake Wallenpaupack | Pike, Wayne | 5,698 acres | 60 ft |
| 5 | Shenango River Lake | Mercer | 3,559 acres | 30 ft |
Sources: Pennsylvania Fish and Boat Commission lake data (ID 401245792730); USGS; Pennsylvania Fish and Boat Commission, WWCW Fisheries Lakes (PASDA PAFishBoat layer 27); Pennsylvania Fish and Boat Commission, Stocked Trout Waterbodies (PASDA PAFishBoat layers 1-2). Verified October 28, 2026.