Calvert Gateway
Calvert Gateway is an earth dam located in Calvert County, Maryland, built in 2000. It carries a Significant hazard potential classification and has a fair condition assessment.
About Calvert Gateway
The primary purpose of Calvert Gateway 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 Penwick Village Ltd Partnership (private). It impounds the Hall Creek-tr near Apple Green Business Pk.
The dam stands 16 feet tall and stretches 200 feet across, creates a reservoir covering 0 acres, has a maximum storage capacity of 4 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 2000, the structure is 26 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 fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. The most recent inspection on record was 11/02/2023.
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Location
| State | Maryland |
| County | Calvert |
| Nearest City | Apple Green Business Pk |
| River/Stream | Hall Creek-tr |
| Coordinates | 38.72030, -76.65582 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 16 ft |
| Dam Length | 200 ft |
| Year Completed | 2000 (26 years old) |
Storage & Hydraulics
| NID Storage | 4 acre-ft |
| Max Storage | 4 acre-ft |
| Normal Storage | 0 acre-ft |
| Surface Area | 0 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 367 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Penwick Village Ltd Partnership |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Fair |
| Last Inspection | 11/02/2023 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00398 |
| Federal ID | MD00398 |
| More Info | State Dam Safety Program |