Dams in Maryland
%!s(int=425)Total Dams
107High Hazard
136Significant
181Low Hazard
Dam Safety in Maryland
Maryland has 425 dams tracked in the National Inventory of Dams. Of these, 107 (25%) are classified as high hazard — meaning failure would probably cause loss of human life — and 136 are classified as significant hazard. Currently, 92 dams in the state have a condition assessment of poor or unsatisfactory, indicating recognized safety deficiencies.
The average dam in Maryland is 60 years old. The most common purpose for dams in Maryland is recreation, accounting for 171 of the state's dams.
Use the search above to find dams near any address in Maryland, or browse by county below. Each dam listing includes its hazard potential classification, condition assessment, physical characteristics, and inspection history from the NID.
Maryland Dam Facts
| Total Dams | 425 |
| High Hazard Dams | 107 |
| Average Dam Age | 60 years |
| Tallest Dam | 296 ft |
| Largest Reservoir | 310,000 acre-ft |
| Poor/Unsatisfactory Condition | 92 |
Notable Dams in Maryland
Counties in Maryland
Allegany12 dams6 high hazardAnne Arundel25 dams1 high hazardBaltimore24 dams11 high hazardBaltimore City10 dams6 high hazardCalvert18 dams2 high hazardCaroline6 damsCarroll14 dams1 high hazardCecil25 dams2 high hazardCharles6 dams1 high hazardDorchester4 damsFrederick21 dams5 high hazardGarrett20 dams10 high hazardHarford19 dams4 high hazardHoward34 dams7 high hazardKent18 damsMineral1 dams1 high hazardMontgomery60 dams17 high hazardPrince George's48 dams23 high hazardQueen Anne's8 damsSomerset1 damsSt. Mary's9 dams1 high hazardTalbot5 damsWashington21 dams6 high hazardWicomico13 dams3 high hazardWorcester3 dams
High Hazard Dams in Maryland
| Dam | County | Height | Condition | Purpose |
|---|---|---|---|---|
| Jennings Randolph Dam | Mineral | 296 ft | Not Available | Flood Risk Reduction |
| Savage River Dam | Garrett | 184 ft | Satisfactory | Flood Risk Reduction |
| Liberty Dam | Baltimore | 175 ft | Unsatisfactory | Water Supply |
| Prettyboy Dam | Baltimore | 155 ft | Fair | Water Supply |
| T. Howard Duckett Dam | Howard | 139 ft | Fair | Water Supply |
| Loch Raven Dam | Baltimore | 130 ft | Satisfactory | Water Supply |
| Druid Hill Lake Reservoir And Storage Tanks | Baltimore City | 118 ft | Poor | Water Supply |
| Little Seneca Dam | Montgomery | 99 ft | Fair | Water Supply |
| Rocky Gap Dam | Allegany | 98 ft | Poor | Water Supply |
| Conowingo | Cecil | 94 ft | Satisfactory | Hydroelectric |
| Deep Creek Dam | Garrett | 85 ft | Fair | Hydroelectric |
| Brighton | Montgomery | 82 ft | Satisfactory | Hydroelectric |
| Hunting Creek Dam | Frederick | 79 ft | Fair | Water Supply |
| Lake Frank | Montgomery | 78 ft | Fair | Recreation |
| Piney Run Dam | Carroll | 73 ft | Unsatisfactory | Water Supply |
| Warner Gap Hollow Dam | Washington | 65 ft | Unsatisfactory | Water Supply |
| Lake Needwood | Montgomery | 65 ft | Fair | Recreation |
| Greenbrier State Park Dam & Dike | Washington | 64 ft | Unsatisfactory | Recreation |
| Seneca State Park Dam (seneca Creek Road) | Montgomery | 64 ft | Poor | Recreation |
| Lake Linganore | Frederick | 63 ft | Unsatisfactory | Recreation |
| Mt. Soma Reservoir | Harford | 61 ft | Satisfactory | Water Supply |
| Little Youghiogheny Site 6 (broadford) | Garrett | 60 ft | Fair | Water Supply |
| Atkisson Reservoir | Harford | 59 ft | Unsatisfactory | Water Supply |
| Pecks Branch Dam (ashburton) | Baltimore City | 59 ft | Satisfactory | Other |
| Fishing Creek Dam | Frederick | 58 ft | Unsatisfactory | Water Supply |
| Frostburg Reservoir | Garrett | 46 ft | Poor | Water Supply |
| Chesapeake Ranch Estates Dam (chisolm Trail) | Calvert | 46 ft | Fair | Recreation |
| Little Youghiogheny Site 5 | Garrett | 45 ft | Fair | Flood Risk Reduction |
| Little Youghiogheny Site 7 | Garrett | 45 ft | Fair | Flood Risk Reduction |
| New Bald Eagle Road Swm | Prince George's | 44 ft | Poor | Flood Risk Reduction |
| Centennial Park Dam | Howard | 42 ft | Satisfactory | Recreation |
| Lake Roland Dam | Baltimore | 42 ft | Fair | Recreation |
| Contee Main Settling Pond | Prince George's | 41 ft | Unsatisfactory | Tailings |
| Woodlawn Railroad Embankment On Basin Run | Cecil | 40 ft | Poor | Other |
| Towson Reservoir Storage Tanks | Baltimore | 40 ft | Satisfactory | Water Supply |
| Inspiration Lake | Montgomery | 40 ft | Satisfactory | Recreation |
| Lake Ashburton Reservoir And Storage Tanks | Baltimore City | 40 ft | Not Rated | Water Supply |
| Umbc Dam | Baltimore | 38 ft | Satisfactory | Flood Risk Reduction |
| Meadow Run Dam | Garrett | 38 ft | Fair | Recreation |
| Lake Arbor (lake Arbor Way) | Prince George's | 38 ft | Poor | Recreation |
| St Marys River Watershed Site 1 | St. Mary's | 38 ft | Fair | Recreation |
| Gilbert Run Dam 3 (jameson Dam) | Charles | 37 ft | Unsatisfactory | Flood Risk Reduction |
| Cox Creek Dmcf | Anne Arundel | 36 ft | Satisfactory | Tailings |
| Broad Creek Dam | Harford | 36 ft | Fair | Recreation |
| Lake Whetstone Dam (montgomery Village Avenue) | Montgomery | 36 ft | Poor | Recreation |
| Hillen Road Water Supply Tank | Baltimore City | 36 ft | Satisfactory | Water Supply |
| Little Youghiogheny Site 1 | Garrett | 36 ft | Fair | Flood Risk Reduction |
| Columbia Gateway Dam | Howard | 36 ft | Fair | Flood Risk Reduction |
| Guilford Reservoir Storage Tanks | Baltimore City | 35 ft | Satisfactory | Water Supply |
| Little Youghiogheny Site 3 | Garrett | 35 ft | Fair | Flood Risk Reduction |
| Little Youghiogheny Site 2 | Garrett | 35 ft | Fair | Flood Risk Reduction |
| Fedex Field Pond No. 1 | Prince George's | 35 ft | Fair | Flood Risk Reduction |
| Lake Walker Dam - Pond 1 (montgomery Village Avenue) | Montgomery | 35 ft | Satisfactory | Recreation |
| Blairs Valley Dam | Washington | 34 ft | Satisfactory | Recreation |
| Lake Montebello | Baltimore City | 30 ft | Fair | Other |
| Emmitsburg Dam | Frederick | 30 ft | Fair | Water Supply |
| Prince George Country Club Dam (pleasant Prospect) | Prince George's | 30 ft | Poor | Recreation |
| Lake Serene (edgewater Drive) | Harford | 29 ft | Fair | Recreation |
| Kurt Sherman Dam (upper Pond) | Washington | 28 ft | Fair | Recreation |
| Indian Creek Site 3 | Prince George's | 28 ft | Fair | Flood Risk Reduction |
| Cosca Regional Park Dam | Prince George's | 28 ft | Fair | Recreation |
| Victoria Station Community Lake | Calvert | 27 ft | Fair | Recreation |
| Lake Helene Dam | Montgomery | 27 ft | Satisfactory | Recreation |
| Crabbs Branch Swm Facility (redland Road) | Montgomery | 27 ft | Satisfactory | Flood Risk Reduction |
| Wheaton Branch Storm Water Management | Montgomery | 27 ft | Poor | Flood Risk Reduction |
| Lake Largo Town Center Dam (kings Way) | Prince George's | 27 ft | Poor | Recreation |
| Lake Elkhorn | Howard | 26 ft | Satisfactory | Recreation |
| Falls Road Golf Course | Montgomery | 25 ft | Satisfactory | Irrigation |
| Railroad Branch Swm Pond | Montgomery | 25 ft | Satisfactory | Flood Risk Reduction |
| Summerfield Swm Pond No. 1 (chatsfield Way) | Prince George's | 23 ft | Poor | Flood Risk Reduction |
| Beaglin Park Dam (beaglin Park Drive) | Wicomico | 23 ft | Poor | Recreation |
| Greenbelt Dam | Prince George's | 22 ft | Satisfactory | Recreation |
| Indian Creek Site 2 | Prince George's | 22 ft | Fair | Flood Risk Reduction |
| Pikesville Reservoir Storage Tanks | Baltimore | 22 ft | Satisfactory | Water Supply |
| Henson Creek Flood Control Dam #17 | Prince George's | 22 ft | Poor | Flood Risk Reduction |
| Aragona Village | Prince George's | 21 ft | Poor | Flood Risk Reduction |
| Laurel Lakes No 1 (lower) | Prince George's | 21 ft | Poor | Recreation |
| Collington Facility 9 Dam (dunwood Crossing Dr) | Prince George's | 21 ft | Satisfactory | Flood Risk Reduction |
| Koontz Run Reservoir Tanks | Allegany | 21 ft | Satisfactory | Water Supply |
| Catonsville Community Park Regional Swm Pond Dam (ba-359) | Baltimore | 21 ft | Fair | Flood Risk Reduction |
| Ashcroft Drive - Woodbridge Pond | Prince George's | 20 ft | Fair | Flood Risk Reduction |
| Bowie Town Center Lake | Prince George's | 20 ft | Poor | Flood Risk Reduction |
| Mays Chapel Reservoir | Baltimore | 20 ft | Satisfactory | Water Supply |
| Hanson Oaks Swm (bmp Structure 1558-002) | Prince George's | 20 ft | Poor | Flood Risk Reduction |
| Gudelsky Pond Dam | Montgomery | 20 ft | Satisfactory | Flood Risk Reduction |
| Holly House Meadows Dam | Howard | 20 ft | Satisfactory | Recreation |
| Lonaconing Reservoir | Allegany | 20 ft | Poor | Water Supply |
| Cash Lake Dam | Prince George's | 20 ft | Fair | Fish and Wildlife Pond |
| Monocacy Boulevard Dam | Frederick | 20 ft | Fair | Flood Risk Reduction |
| Midland-gilmore Reservoir | Allegany | 19 ft | Poor | Water Supply |
| Lower Lake Royer | Washington | 19 ft | Fair | Water Supply |
| Junction Industrial Park | Howard | 18 ft | Satisfactory | Flood Risk Reduction |
| Fairfield East Dam | Montgomery | 18 ft | Fair | Flood Risk Reduction |
| Perrywood (manor House Drive) | Prince George's | 16 ft | Fair | Flood Risk Reduction |
| Dry Run Detention Dam And Culvert | Allegany | 16 ft | Poor | Flood Risk Reduction |
| Summit Creek - Mount Auburn Dr | Prince George's | 15 ft | Poor | Flood Risk Reduction |
| Fullerton Reservoir Tanks | Baltimore | 15 ft | Satisfactory | Water Supply |
| Summerfield Swm Pond No. 2 | Prince George's | 15 ft | Poor | Flood Risk Reduction |
| Roland Run Levee | Baltimore | 15 ft | Fair | Flood Risk Reduction |
| Rolling Hills Swm Pond | Montgomery | 15 ft | Satisfactory | Flood Risk Reduction |