Rockport Colony #1
Rockport Colony #1 is an earth dam located in Teton County, Montana, built in 1960. It carries a Low hazard potential classification.
About Rockport Colony #1
The primary purpose of Rockport Colony #1 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 Rockport Colony Inc. (private). It impounds the Tr-s Fork Dry Fork Marias Ri near Pendroy.
The dam stands 7 feet tall and stretches 400 feet across, and has a maximum storage capacity of 88 acre-feet. Completed in 1960, 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 | Teton |
| Nearest City | Pendroy |
| River/Stream | Tr-s Fork Dry Fork Marias Ri |
| Coordinates | 48.05650, -112.51030 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 400 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 88 acre-ft |
| Max Storage | 88 acre-ft |
| Normal Storage | 7 acre-ft |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | ROCKPORT COLONY INC. |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03395 |
| Federal ID | MT03395 |
| More Info | State Dam Safety Program |