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 101–125 of 425
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Roberts Field Basin 3 (Sycamore Drive) Carroll County | 18 | 1992 | Significant | Unsatisfactory |
| Roberts Field Basin 2 (North Woods Trail Near Trophy Drive) Carroll County | 22 | 1992 | Significant | Poor |
| Roberts Field Basin 1 (North Woods Trail At Boxwood) Carroll County | 25 | 1992 | Significant | Fair |
| Riva Trace Community Pond Anne Arundel County | 15 | 1985 | Significant | Fair |
| Ritchie Hill Swm Pond Prince George's County | 15 | 2008 | Significant | Poor |
| Rising Sun Waste Water Lagoon Cecil County | 10 | 1964 | Low | Not Rated |
| Riley Mill Pond Kent County | 14 | 1950 | Low | Fair |
| Riley Mill Dam - Lower Pond Kent County | 14 | 1950 | Low | Poor |
| Riggs Farm Pond Howard County | 24 | 1988 | Low | Not Rated |
| Richard Smith Dam Kent County | 9 | 1970 | Low | Fair |
| Riawakin Pond (Nanticoke Road) Wicomico County | 16 | 1950 | Low | Satisfactory |
| Rewastico Pond (Athol Road) Wicomico County | 10 | 1911 | Low | Fair |
| Reichs Ford Landfill Swm Dam Frederick County | 39 | 1995 | Low | Satisfactory |
| Redington Lake Dam Prince George's County | 13 | 1940 | Low | Poor |
| Rattlewood Golf Course Montgomery County | 31 | 1975 | Significant | Satisfactory |
| Railroad Branch Swm Pond Montgomery County | 25 | 1990 | High | Satisfactory |
| Rabbitt Road Swm Pond Montgomery County | 23 | 1981 | Low | Not Rated |
| Queensberry Drive Swm Pond Calvert County | 19 | 2001 | Significant | Fair |
| Queensberry Drive Playground Dam Calvert County | 28 | 1981 | Significant | Fair |
| Queen Annes Village Swm Pond No. 1 Baltimore County | 20 | 2007 | Significant | Fair |
| Quaker Mill Flood Control Dam Howard County | — | — | Significant | Not Rated |
| Prince George Country Club Dam (Pleasant Prospect) Prince George's County | 30 | 1982 | High | Poor |
| Prince Frederick Wwtp Pond 2 Calvert County | 65 | 2002 | Low | Not Rated |
| Priestford Hills Harford County | 24 | 1974 | Low | Fair |
| Prettyboy Dam Baltimore County | 155 | 1936 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.