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 151–175 of 425
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Holly House Meadows Dam Howard County | 20 | 1983 | High | Satisfactory |
| Holton Pond Dam St. Mary's County | 13 | 1958 | Low | Fair |
| Hunters Run Swm Dam Harford County | 24 | 1996 | Significant | Satisfactory |
| Hunting Creek Dam Frederick County | 79 | 1969 | High | Fair |
| Hurlock Oxidation Ponds Dorchester County | 24 | 1968 | Low | Not Rated |
| Indian Acres of The Chesapeake Bay (Holly Drive) Cecil County | 15 | 1973 | Low | Unsatisfactory |
| Indian Creek Site 2 Prince George's County | 22 | 1983 | High | Fair |
| Indian Creek Site 3 Prince George's County | 28 | 1983 | High | Fair |
| Industrial Dam (Blue Bridge) Allegany County | 40 | 1954 | Low | Not Rated |
| Inspiration Lake Montgomery County | 40 | 1950 | High | Satisfactory |
| Jennifer Road Swm Route 50 and Route 2 (Sha Bmp 020259) Anne Arundel County | 47 | 1985 | Significant | Not Rated |
| Jennings Randolph Dam Mineral County | 296 | 1981 | High | Not Available |
| Jessup Park Dam Howard County | 15 | 2010 | Significant | Poor |
| Jessup Prison Dam Anne Arundel County | 31 | 1982 | Significant | Fair |
| Johns Hopkins Bayview Campus Swm Pond Baltimore City County | 20 | 2004 | Significant | Fair |
| Johnsons Pond Wicomico County | 23 | 1936 | Significant | Fair |
| Jones Lake Dam Kent County | 13 | 1930 | Low | Poor |
| Joseph A. Banks Swm Pond Carroll County | 15 | 1975 | Low | Not Rated |
| Junction Industrial Park Howard County | 18 | 1984 | High | Satisfactory |
| Kemp Farm Pond Garrett County | 28 | 1971 | Low | Satisfactory |
| Koontz Run Reservoir Tanks Allegany County | 21 | 2015 | High | Satisfactory |
| Koteen Property Dam Montgomery County | 25 | 1991 | Low | Not Rated |
| Kurt Sherman Dam (Upper Pond) Washington County | 28 | 1957 | High | Fair |
| Lake Allen Dam Anne Arundel County | 11 | 1947 | Low | Poor |
| Lake Anita Louise Frederick County | 40 | 1973 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.