Rivers in Maryland
Susquehanna River at Conowingo Dam
Below flood stage
12.28ftStage
Observed Wed, Sep 23, 6:35 AM EDT
- Flood stage
- 23.50 ft
- Record crest
- 36.83 ft1972
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 28.50 ft |
| Moderate flood | 24.80 ft |
| Minor flood | 23.50 ft |
| Action | 21.50 ft |
- 31.00 ftNotification level 9 with 43 to 53 gates open at Conowingo dam.
- 29.40 ftNotification level 8 with 36 to 42 gates open at Conowingo Dam.
- 28.50 ftNotification level 7 with 33 to 35 gates open at Conowingo Dam.
- 26.30 ftNotification level 6 with 26 to 32 gates open at Conowingo Dam.
- 24.80 ftBackyards and basements on Main Street and Tome's Landing begin to flood.
- 23.70 ftMinor flooding begins in the town of Port Deposit, Maryland.
- 22.90 ftMaryland Route 222 north of Port Deposit is closed.
- 21.50 ftNotification level 2 with 12 to 15 gates open at Conowingo Dam.
- 20.00 ftNotification level 1 with 10 to 11 gates open at Conowingo Dam.
Crest history
47 crests on NOAA’s list since 1968.
| # | Date | Stage |
|---|---|---|
| 1 | June 24, 1972 | 36.83 ft |
| 2 | January 20, 1996 | 34.18 ft |
| 3 | September 9, 2011 | 32.41 ft |
| 4 | September 27, 1975 | 30.92 ft |
| 5 | September 19, 2004 | 30.07 ft |
| 6 | February 16, 1984 | 28.08 ft |
| 7 | April 2, 1993 | 28.06 ft |
| 8 | March 7, 1979 | 28.04 ft |
| 9 | June 29, 2006 | 27.31 ft |
| 10 | April 4, 2005 | 26.70 ft |
| 11 | February 4, 1970 | 26.40 ft |
| 12 | March 16, 1986 | 26.17 ft |
| 13 | March 23, 1994 | 26.16 ft |
| 14 | July 26, 2018 | 26.08 ft |
| 15 | January 28, 1978 | 25.64 ft |
| 16 | March 6, 2008 | 25.64 ft |
| 17 | January 10, 1998 | 25.55 ft |
| 18 | February 25, 1981 | 25.18 ft |
| 19 | April 29, 2011 | 25.12 ft |
| 20 | January 28, 1976 | 24.65 ft |
| 21 | January 27, 2010 | 24.37 ft |
| 22 | September 3, 2021 | 24.29 ft |
| 23 | March 22, 2003 | 24.15 ft |
| 24 | November 11, 1996 | 24.04 ft |
| 25 | October 10, 1976 | 23.99 ft |
Most recent crests
- September 3, 2021: 24.29 ft
- May 2, 2020: 22.32 ft
- November 28, 2018: 21.52 ft
- July 26, 2018: 26.08 ft
- February 2, 2013: 21.60 ft
- September 9, 2011: 32.41 ft
- April 29, 2011: 25.12 ft
- April 19, 2011: 23.46 ft
- March 11, 2011: 21.52 ft
- January 27, 2010: 24.37 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the Middle Atlantic River Forecast Center. Forecasts are issued as needed during times of high water, but are not routinely available. Gauge reading affected by power generation.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.