Marys Lamb is an earth dam located in Carter County, Montana, built in 1945. It carries a Low hazard potential classification.
Dam profile
NID height · 14 ft14 ft tall and 900 ft long. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Marys Lamb
The primary purpose of Marys Lamb is fire protection, stock, or small fish pond. The dam maintains a small impoundment used for fire suppression, livestock watering, or as a fish pond. The dam is owned by Norman Lambert (private). It impounds the Tr-box Elder Creek near Capitol.
The dam stands 14 feet tall and stretches 900 feet across, has a maximum storage capacity of 136 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1945, the structure is well-established, with more than 75 years of service.
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.
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Location
| State | Montana |
| County | Carter |
| Nearest City | Capitol |
| River/Stream | Tr-box Elder Creek |
| Coordinates | 45.34210, -104.81050 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 14 ft |
| Dam Height | 14 ft |
| Dam Length | 900 ft |
| Year Completed | 1945 (81 years old) |
Storage & Hydraulics
| NID Storage | 136 acre-ft |
| Max Storage | 136 acre-ft |
| Normal Storage | 50 acre-ft |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Norman Lambert |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03045 |
| Federal ID | MT03045 |
| More Info | State Dam Safety Program |