Rivers in Maryland
Potomac River at Williamsport
Flood stages and impacts
- 62.00 ftWater begins to flood the R.C. Wilson water treatment plant. The plant will flood at a lower level if the levee protection is breached.
- 32.00 ftWater enters the Williamsport Cushwa visitor center and trolley building in Williamsport.
- 29.00 ftWater covers most of the C&O Canal towpath and the bridge over the Conococheague Aqueduct.
- 28.00 ftWater begins to cover the C&O Canal Towpath.
- 25.00 ftStructures begin to flood at the Potomac Fish and Game Club.
- 23.00 ftWater begins to inundate lower portions of the Potomac Fish & Game Club.
- 10.50 ftWater exceeds the banks and covers the road at the end of the boat ramp in Williamsport.
Crest history
12 crests on NOAA’s list since 1932.
| # | Date | Stage |
|---|---|---|
| 1 | March 18, 1936 | 48.60 ft |
| 2 | April 27, 1937 | 37.00 ft |
| 3 | November 6, 1985 | 36.30 ft |
| 4 | October 16, 1942 | 36.10 ft |
| 5 | January 20, 1996 | 34.80 ft |
| 6 | June 23, 1972 | 34.00 ft |
| 7 | September 8, 1996 | 31.10 ft |
| 8 | May 13, 1932 | 26.50 ft |
| 9 | October 9, 1976 | 25.00 ft |
| 10 | March 15, 2010 | 24.90 ft |
| 11 | June 4, 2018 | 24.49 ft |
| 12 | May 19, 2011 | 22.90 ft |
Most recent crests
- June 4, 2018: 24.49 ft
- May 19, 2011: 22.90 ft
- March 15, 2010: 24.90 ft
- September 8, 1996: 31.10 ft
- January 20, 1996: 34.80 ft
- November 6, 1985: 36.30 ft
- October 9, 1976: 25.00 ft
- June 23, 1972: 34.00 ft
- October 16, 1942: 36.10 ft
- April 27, 1937: 37.00 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Middle Atlantic River Forecast Center. Graphical forecasts are not available during times of high water, forecast crest information can be found in the local WFO web page. Gauge readings received once daily during low-water and more frequently during high water. Stage may be affected by ice.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.