Lakes / Pennsylvania / Long Arm Dam
Long Arm Dam, Pennsylvania
225 acres
Surface Area
662 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Pennsylvania
39.75 degrees N, 76.99 degrees W - York 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.
Facts and Figures
Waterbody ID394512765948
CountyYork
Fishing IncludesWalleye, Northern Pike, Largemouth Bass, Black Crappie, Yellow Perch, Bluegill, Pumpkinseed
Coordinates39.7457, -76.9913
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 394512765948); USGS; Pennsylvania Fish and Boat Commission, WWCW Fisheries Lakes (PASDA PAFishBoat layer 27). Verified October 28, 2026.