Dams in Maryland
419
Total Dams
101
High Hazard
24.11%
% High Hazard
59.6 yrs
Average Age
Counties
| County | Dams | High Hazard | % High | Avg Age |
|---|---|---|---|---|
| Prince George's | 48 | 18 | 37.50% | 44.1 yrs |
| Montgomery | 60 | 17 | 28.33% | 51.0 yrs |
| Baltimore | 25 | 11 | 44.00% | 57.9 yrs |
| Garrett | 20 | 10 | 50.00% | 67.4 yrs |
| Howard | 34 | 7 | 20.59% | 40.6 yrs |
| Washington | 20 | 6 | 30.00% | 88.6 yrs |
| Baltimore City | 10 | 6 | 60.00% | 101.8 yrs |
| Allegany | 11 | 6 | 54.55% | 65.1 yrs |
| Frederick | 22 | 5 | 22.73% | 53.5 yrs |
| Harford | 19 | 4 | 21.05% | 56.7 yrs |
| Wicomico | 13 | 3 | 23.08% | 85.8 yrs |
| Cecil | 25 | 2 | 8.00% | 58.8 yrs |
| Calvert | 18 | 2 | 11.11% | 54.6 yrs |
| St. Mary's | 8 | 1 | 12.50% | 49.1 yrs |
| Carroll | 12 | 1 | 8.33% | 47.2 yrs |
| Charles | 6 | 1 | 16.67% | 57.3 yrs |
| Talbot | 4 | 0 | 0.00% | 64.8 yrs |
| Kent | 18 | 0 | 0.00% | 75.8 yrs |
| Worcester | 3 | 0 | 0.00% | 78.0 yrs |
| Caroline | 6 | 0 | 0.00% | 103.2 yrs |
| Dorchester | 3 | 0 | 0.00% | 69.3 yrs |
| Anne Arundel | 24 | 0 | 0.00% | 47.4 yrs |
| Queen Anne's | 8 | 0 | 0.00% | 91.5 yrs |
Purpose Breakdown
Tallest Dams in Maryland
| Dam Name | Height | County | Hazard |
|---|---|---|---|
| Jennings Randolph Dam | 296 ft | Mineral | High Hazard |
| Savage River Dam | 184 ft | Garrett | High Hazard |
| Liberty Dam | 175 ft | Baltimore | High Hazard |
| Prettyboy Dam | 155 ft | Baltimore | High Hazard |
| T. Howard Duckett Dam | 139 ft | Howard | High Hazard |
| Loch Raven Dam | 130 ft | Baltimore | High Hazard |
| Druid Hill Lake Reservoir and Storage Tanks | 118 ft | Baltimore City | High Hazard |
| Little Seneca Dam | 99 ft | Montgomery | High Hazard |
| Rocky Gap Dam | 98 ft | Allegany | High Hazard |
| Conowingo | 94 ft | Cecil | High Hazard |