Milford Colony is an earth dam located in Lewis and Clark County, Montana, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 15 ft15 ft tall and 150 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 Milford Colony
The primary purpose of Milford Colony 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 State of Montana, D.n.r.c., T.l.m.d. (state). It impounds the Tr-hogan Creek near Cascade.
The dam stands 15 feet tall and stretches 150 feet across, has a maximum storage capacity of 92 acre-feet, and collects water from a drainage area of 4 square miles. Completed in 1963, 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 | Lewis and Clark |
| Nearest City | Cascade |
| River/Stream | Tr-hogan Creek |
| Coordinates | 47.35820, -112.18120 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 150 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 92 acre-ft |
| Max Storage | 92 acre-ft |
| Normal Storage | 36 acre-ft |
| Drainage Area | 4 sq mi |
| Max Discharge | 530 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | State of Montana, D.n.r.c., T.l.m.d. |
| Owner Type | State |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00302 |
| Federal ID | MT00302 |
| More Info | State Dam Safety Program |