R.H. Saunders Main
| Dam Name | R.H. Saunders Main |
| River | St. Lawrence River |
| Near City | Cornwall |
| Administration City | Ontario |
| Country | Canada |
| Secondary Country | United States |
| Year | 1958 |
| Dam Height | 52 |
| Dam Length | 6140 |
| Area(Sqkm) | 163.3 |
| Area(Polygonal) | 163.3 |
| Capital Expenditure | 807.9 |
| Depth(M) | 4.9 |
| Avg Displacement Of Water | 7346802 |
| Catchment Area In Sqkm | 771640 |
| Status | 3: Fair |
| Longitude | -74.787083 |
| Latitude | 45.00375 |
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