Mc Allister Pond No. 1
Mc Allister Pond No. 1 is an earth dam located in Charles County, Maryland, built in 1967. It carries a Low hazard potential classification and has a poor condition assessment.
About Mc Allister Pond No. 1
The primary purpose of Mc Allister Pond No. 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Jake Grier (private). It impounds the Kerrick Swamp-tr near Rogers Mill.
The dam stands 22 feet tall and stretches 350 feet across, creates a reservoir covering 3 acres, has a maximum storage capacity of 52 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
This dam has a low hazard potential classification, meaning that failure would cause minimal damage, limited primarily to the dam owner's property, with no expected 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 09/15/2020.
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Location
| State | Maryland |
| County | Charles |
| Nearest City | Rogers Mill |
| River/Stream | Kerrick Swamp-tr |
| Coordinates | 38.53991, -76.92409 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 22 ft |
| Dam Height | 22 ft |
| Dam Length | 350 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 52 acre-ft |
| Max Storage | 52 acre-ft |
| Normal Storage | 24 acre-ft |
| Surface Area | 3 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 70 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Jake Grier |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Poor |
| Last Inspection | 09/15/2020 |
| Emergency Action Plan | No |
Identifiers
| NID ID | MD00171 |
| Federal ID | MD00171 |
| More Info | State Dam Safety Program |