Susquehanna River at Conowingo Dam
Flood levels
Official flood levels at this gauge: action stage begins at 21.5 ft; minor flooding begins at 23.5 ft; moderate flooding begins at 24.8 ft; major flooding begins at 28.5 ft.
| Action stage | 21.5 ft |
|---|---|
| Minor flooding | 23.5 ft |
| Moderate flooding | 24.8 ft |
| Major flooding | 28.5 ft |
Highest recorded crests
- 36.8 ft on Jun 24, 1972 (historic crest)
- 34.2 ft on Jan 20, 1996 (historic crest)
- 32.4 ft on Sep 9, 2011 (historic crest)
- 30.9 ft on Sep 27, 1975 (historic crest)
What the water does
National Weather Service impact statements for this gauge, in the Weather Service's own words.
| 20.0 ft | Notification level 1 with 10 to 11 gates open at Conowingo Dam. |
|---|---|
| 21.5 ft | Notification level 2 with 12 to 15 gates open at Conowingo Dam. |
| 22.9 ft | Maryland Route 222 north of Port Deposit is closed. |
| 23.7 ft | Minor flooding begins in the town of Port Deposit, Maryland. |
| 24.8 ft | Backyards and basements on Main Street and Tome's Landing begin to flood. |
| 26.3 ft | Notification level 6 with 26 to 32 gates open at Conowingo Dam. |
| 28.5 ft | Notification level 7 with 33 to 35 gates open at Conowingo Dam. |
| 29.4 ft | Notification level 8 with 36 to 42 gates open at Conowingo Dam. |
| 31.0 ft | Notification level 9 with 43 to 53 gates open at Conowingo dam. |
Forecast office: NWS Sterling · River Forecast Center: Middle Atlantic River Forecast Center.
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Nearby stations and gauges
- Deer Creek (MD) near Darlington NWS gauge · 2.9 mi
- Octoraro Creek near Richardsmere NWS gauge · 4.6 mi
- Port Deposit NOAA tide station · 5.0 mi
- Chesapeake Bay at Havre de Grace (IN MLLW) NWS gauge · 9.4 mi
- Havre de Grace NOAA tide station · 9.5 mi
- Swan Creek at Swan Creek NWS gauge · 9.5 mi