Southerland Lacosta is an earth dam located in Garfield County, Montana, built in 1957. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 325 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 Southerland Lacosta
The primary purpose of Southerland Lacosta 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 Lacosta Livestock Co (private). It impounds the Southerland Coulee near Van Norman.
The dam stands 21 feet tall and stretches 325 feet across, and has a maximum storage capacity of 225 acre-feet. Completed in 1957, 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.
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Location
| State | Montana |
| County | Garfield |
| Nearest City | Van Norman |
| River/Stream | Southerland Coulee |
| Coordinates | 47.22270, -107.03260 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 325 ft |
| Year Completed | 1957 (69 years old) |
Storage & Hydraulics
| NID Storage | 225 acre-ft |
| Max Storage | 225 acre-ft |
| Normal Storage | 109 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Lacosta Livestock Co |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02257 |
| Federal ID | MT02257 |
| More Info | State Dam Safety Program |