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
Condition Assessment
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 1–25 of 107
| Dam Name | Height (ft) | Year | Hazard | Condition |
|---|---|---|---|---|
| Woodlawn Railroad Embankment On Basin Run Cecil County | 40 | 1940 | High | Poor |
| Wheaton Branch Storm Water Management Montgomery County | 27 | 1979 | High | Poor |
| Warner Gap Hollow Dam Washington County | 65 | 1902 | High | Unsatisfactory |
| Vista Business Park Washington County | 13 | 2020 | High | Satisfactory |
| Victoria Station Community Lake Calvert County | 27 | 1986 | High | Fair |
| Upper Potomac Industrial Park Levee Allegany County | 8 | 2005 | High | Fair |
| Umbc Dam Baltimore County | 38 | 1976 | High | Satisfactory |
| Towson Reservoir Storage Tanks Baltimore County | 40 | 2013 | High | Satisfactory |
| T. Howard Duckett Dam Howard County | 139 | 1953 | High | Fair |
| Summit Hall Park Dam Montgomery County | 14 | 1993 | High | Satisfactory |
| Summit Creek - Mount Auburn Dr Prince George's County | 15 | 2000 | High | Poor |
| Summerfield Swm Pond No. 2 Prince George's County | 15 | — | High | Poor |
| Summerfield Swm Pond No. 1 (Chatsfield Way) Prince George's County | 23 | 1994 | High | Poor |
| St Marys River Watershed Site 1 St. Mary's County | 38 | 1975 | High | Fair |
| Seneca State Park Dam (Seneca Creek Road) Montgomery County | 64 | 1975 | High | Poor |
| Savage River Dam Garrett County | 184 | 1952 | High | Satisfactory |
| Rolling Hills Swm Pond Montgomery County | 15 | 1982 | High | Satisfactory |
| Roland Run Levee Baltimore County | 15 | 1982 | High | Fair |
| Rocky Gap Dam Allegany County | 98 | 1969 | High | Poor |
| Railroad Branch Swm Pond Montgomery County | 25 | 1990 | High | Satisfactory |
| Prince George Country Club Dam (Pleasant Prospect) Prince George's County | 30 | 1982 | High | Poor |
| Prettyboy Dam Baltimore County | 155 | 1936 | High | Fair |
| Piney Run Dam Carroll County | 73 | 1974 | High | Unsatisfactory |
| Pikesville Reservoir Storage Tanks Baltimore County | 22 | 2007 | High | Satisfactory |
| Perrywood (Manor House Drive) Prince George's County | 16 | 1984 | High | Fair |
Data sourced from the National Inventory of Dams (NID). Hazard classification reflects potential consequences of failure, not the likelihood of failure.