Lacosta
Lacosta is an earth dam located in Garfield County, Montana, built in 1968. It carries a Low hazard potential classification.
About Lacosta
The primary purpose of Lacosta is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Lacosta Livestock Co (private). It impounds the Sand Creek near Van Norman.
The dam stands 28 feet tall and stretches 2,640 feet across, and has a maximum storage capacity of 1,676 acre-feet. Completed in 1968, 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 | Sand Creek |
| Coordinates | 47.11910, -107.06150 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 2,640 ft |
| Year Completed | 1968 (58 years old) |
Storage & Hydraulics
| NID Storage | 1,676 acre-ft |
| Max Storage | 1,676 acre-ft |
| Normal Storage | 707 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | LACOSTA LIVESTOCK CO |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00472 |
| Federal ID | MT00472 |
| More Info | State Dam Safety Program |