| 31.0 | Notification level 9 with 43 to 53 gates open at Conowingo Dam. Mandatory evacuations initiated in Port Deposit. | | 29.4 | Notification level 8 with 36 to 42 gates open at Conowingo Dam. | | 28.5 | Notification level 7 with 33 to 35 gates open at Conowingo Dam. | | 26.3 | Notification level 6 with 26 to 32 gates open at Conowingo Dam. | | 24.8 | Notification level 5 with 21 to 25 gates open at Conowingo Dam. Backyards and basements on Main Street and Tomes Landing begin to flood. | | 23.7 | Notification level 4 with 18 to 20 gates open at Conowing Dam. Minor flooding begins in the town of Port Deposit Maryland. | | 22.9 | Notification level 3 with 16 to 17 gates open at Conowingo Dam. Maryland route 222 north of Port Deposit closed. | | 21.5 | Notification level 2 with 12 to 15 gates open at Conowingo Dam. | | 20.0 | Notification level 1 with 10 to 11 gates open at Conowingo dam. |
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1) 36.83 ft on 06/24/1972
2) 34.18 ft on 01/20/1996
3) 30.92 ft on 09/27/1975
4) 30.07 ft on 09/19/2004
5) 28.08 ft on 02/16/1984
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Low water records are unavailable.
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