Gilbert Run Dam 1 (trinity Church)
Gilbert Run Dam 1 (trinity Church) is an earth dam located in Charles County, Maryland, built in 1964. It carries a Significant hazard potential classification and has a poor condition assessment.
About Gilbert Run Dam 1 (trinity Church)
The primary purpose of Gilbert Run Dam 1 (trinity Church) is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Gilbert Run Watershed Assoc (private). It impounds the Trinity Church Run near Newport.
The dam stands 41 feet tall and stretches 1,690 feet across, creates a reservoir covering 73 acres, has a maximum storage capacity of 4,840 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1964, the structure is well into its service life at over 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. The most recent inspection on record was 02/27/2024.
At 41 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Maryland |
| County | Charles |
| Nearest City | Newport |
| River/Stream | Trinity Church Run |
| Coordinates | 38.45320, -76.84650 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 41 ft |
| Dam Height | 41 ft |
| Dam Length | 1,690 ft |
| Year Completed | 1964 (62 years old) |
Storage & Hydraulics
| NID Storage | 4,840 acre-ft |
| Max Storage | 4,840 acre-ft |
| Normal Storage | 480 acre-ft |
| Surface Area | 73 acres |
| Drainage Area | 8 sq mi |
| Max Discharge | 6,100 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Gilbert Run Watershed Assoc |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Poor |
| Last Inspection | 02/27/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00037 |
| Federal ID | MD00037 |
| More Info | State Dam Safety Program |