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 251–275 of 425
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Millersville Post Office Dam Anne Arundel County | — | — | Significant | Not Rated |
| Mitchell Pond #1 (Nanticoke Road) Wicomico County | 9 | 1937 | Significant | Fair |
| Monocacy Boulevard Dam Frederick County | 20 | 2011 | High | Fair |
| Montclair Manor Levee (Asset 14616) Montgomery County | 15 | 2004 | Significant | Fair |
| Montebello Waste Water Lake Baltimore City County | 46 | 1915 | Low | Not Rated |
| Montgomery Auto Park Dam Montgomery County | 29 | 1987 | Low | Satisfactory |
| Montgomery College - Germantown Campus - Swm Pond Montgomery County | 21 | 1987 | Low | Satisfactory |
| Montgomery College - Rockville Campus - Swm Dam Montgomery County | 14 | 1965 | Significant | Satisfactory |
| Montgomery Run Swm Pond 1 (Montgomery Run Road) Howard County | 20 | 1990 | Significant | Fair |
| Morris Mill Pond (South Division Street) Wicomico County | 12 | 1947 | High | Satisfactory |
| Mt Airy Park-N-Ride Swm Pond Frederick County | 15 | 1972 | Significant | Fair |
| Mt. Soma Reservoir Harford County | 61 | 2018 | High | Satisfactory |
| Myrtle Grove Lake Charles County | 14 | 1965 | Low | Satisfactory |
| Nagels Mill Pond Caroline County | 16 | 1860 | Significant | Fair |
| New Bald Eagle Road Swm Prince George's County | 44 | 2006 | High | Poor |
| New Germany State Park Dam Garrett County | 12 | 1930 | Low | Satisfactory |
| New Mark Commons Community Lake Montgomery County | 15 | 1966 | Significant | Poor |
| Newpage Westvaco Dam Allegany County | 7 | 1913 | Low | Fair |
| Norris Dam St. Mary's County | 10 | 1990 | Low | Not Rated |
| North Creek Dam Montgomery County | 24 | 1977 | Low | Satisfactory |
| 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 |
| Oaks of Harford (Tollgate Road) Harford County | 43 | 1984 | Low | Not Rated |
| Old Loch Raven Dam Baltimore County | 20 | 1875 | Low | Not Rated |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.