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 51–75 of 181
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Great Falls Dam, Lock No. 20 Montgomery County | 8 | 1850 | Low | Not Rated |
| Great Falls Estate Dam Montgomery County | 34 | 1963 | Low | Not Rated |
| Great Star Drive Swm Dam Howard County | 20 | 1997 | Low | Satisfactory |
| Greencastle Lakes Dam (Ballinger Drive) Montgomery County | 36 | 1965 | Low | Satisfactory |
| Greenspring East Swm Pond No. 3 (Stream Crossing Road) Baltimore County | 34 | 1995 | Low | Poor |
| Hagerstown City Park Lake (Key Street) Washington County | 10 | 1920 | Low | Satisfactory |
| Hagerstown Municipal Pwr Plant Dam Washington County | 10 | 1950 | Low | Fair |
| Hallowell Swm Dam Montgomery County | 29 | 1990 | Low | Satisfactory |
| Hampstead Industrial Center Dam Carroll County | 28 | 1956 | Low | Not Rated |
| Hancock Sewage Lagoon Washington County | 8 | 1963 | Low | Satisfactory |
| Heritage Harbour (Mastline Drive) Anne Arundel County | 34 | 1974 | Low | Fair |
| Herrington Manor Garrett County | 24 | 1938 | Low | Satisfactory |
| Hexton Farms Cecil County | 15 | 1966 | Low | Not Rated |
| Higgins Millpond Dorchester County | 9 | 1801 | Low | Not Rated |
| High Banks Talbot County | 19 | 1974 | Low | Not Rated |
| Highland Lake Howard County | 22 | 1960 | Low | Satisfactory |
| Holton Pond Dam St. Mary's County | 13 | 1958 | Low | 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 |
| Industrial Dam (Blue Bridge) Allegany County | 40 | 1954 | Low | Not Rated |
| Jones Lake Dam Kent County | 13 | 1930 | Low | Poor |
| Joseph A. Banks Swm Pond Carroll County | 15 | 1975 | Low | Not Rated |
| Kemp Farm Pond Garrett County | 28 | 1971 | Low | Satisfactory |
| Koteen Property Dam Montgomery County | 25 | 1991 | Low | Not Rated |
| Lake Allen Dam Anne Arundel County | 11 | 1947 | Low | Poor |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.