Maryland Dams
425 dams tracked by the National Inventory of Dams
Total Dams
425
High Hazard
107
25.2%
Poor / Unsatisfactory
92
Average Age
60 yrs
Hazard Classification
High107 (25.2%)
Significant136 (32.0%)
Low181 (42.6%)
Condition Assessment
Satisfactory127 (29.9%)
Fair143 (33.6%)
Poor / Unsatisfactory92 (21.6%)
Not Rated63 (14.8%)
Federal
14
State
45
Local
166
Private
192
Tallest Dams
- Jennings Randolph Dam296 ft
- Savage River Dam184 ft
- Liberty Dam175 ft
- Prettyboy Dam155 ft
- T. Howard Duckett Dam139 ft
High Hazard Dams
Poor Condition Dams
- Liberty DamUnsatisfactory
- Druid Hill Lake Reservoir and Storage TanksPoor
- Rocky Gap DamPoor
- Piney Run DamUnsatisfactory
- Warner Gap Hollow DamUnsatisfactory
All Dams in Maryland
Showing 76–100 of 136
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Montgomery Run Swm Pond 1 (Montgomery Run Road) Howard County | 20 | 1990 | Significant | Fair |
| Mt Airy Park-N-Ride Swm Pond Frederick County | 15 | 1972 | Significant | Fair |
| Nagels Mill Pond Caroline County | 16 | 1860 | Significant | Fair |
| New Mark Commons Community Lake Montgomery County | 15 | 1966 | Significant | Poor |
| North Laurel Park Swm Pond (Sewall Avenue) Howard County | 30 | 1998 | Significant | Satisfactory |
| Northridge Swm Pond (Quisinberry Way) Prince George's County | 28 | 1989 | Significant | Fair |
| Oakhurst Section 1 Swm Dam (Oakhurst Drive) Howard County | 12 | 1998 | Significant | Fair |
| Oliver Company (Lower Pond) Washington County | 18 | 1957 | Significant | Poor |
| Owings Farm Pond Queen Anne's County | 16 | 1967 | Significant | Fair |
| Painters Mill Levee Baltimore County | 14 | 1989 | Significant | Satisfactory |
| Perryville Water Supply Cecil County | 15 | 1900 | Significant | Poor |
| Potomac Dam No. 5 Washington County | 20 | 1830 | Significant | Not Available |
| Potomac River Dam #4 Washington County | 20 | 1869 | Significant | Not Available |
| Quaker Mill Flood Control Dam Howard County | — | — | Significant | Not Rated |
| Queen Annes Village Swm Pond No. 1 Baltimore County | 20 | 2007 | Significant | Fair |
| Queensberry Drive Playground Dam Calvert County | 28 | 1981 | Significant | Fair |
| Queensberry Drive Swm Pond Calvert County | 19 | 2001 | Significant | Fair |
| Rattlewood Golf Course Montgomery County | 31 | 1975 | Significant | Satisfactory |
| Ritchie Hill Swm Pond Prince George's County | 15 | 2008 | Significant | Poor |
| Riva Trace Community Pond Anne Arundel County | 15 | 1985 | Significant | Fair |
| Roberts Field Basin 1 (North Woods Trail At Boxwood) Carroll County | 25 | 1992 | Significant | Fair |
| Roberts Field Basin 2 (North Woods Trail Near Trophy Drive) Carroll County | 22 | 1992 | Significant | Poor |
| Roberts Field Basin 3 (Sycamore Drive) Carroll County | 18 | 1992 | Significant | Unsatisfactory |
| Rolling Green Community Pond Harford County | 22 | 1965 | Significant | Satisfactory |
| Sassafras Mill Dam Kent County | 10 | 1934 | Significant | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.