Dry Fork is an earth dam located in Blaine County, Montana, built in 1986. It carries a Significant hazard potential classification.
Dam profile
NID height · 45 ft45 ft tall and 1,300 ft long, taller than 90% of U.S. dams with a recorded height. 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 Dry Fork
The primary purpose of Dry Fork is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Briese Brothers (private). It impounds the Dry Fork Creek near Chinook.
The dam stands 45 feet tall and stretches 1,300 feet across, creates a reservoir covering 406 acres, and has a maximum storage capacity of 6,229 acre-feet. Completed in 1986, the structure is 40 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 07/18/2006. That was over 20 years ago.
At 45 feet, this dam is taller than 90% of dams nationwide.
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Location
| State | Montana |
| County | Blaine |
| Nearest City | Chinook |
| River/Stream | Dry Fork Creek |
| Coordinates | 48.66440, -109.22270 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 45 ft |
| Dam Height | 45 ft |
| Dam Length | 1,300 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 6,229 acre-ft |
| Max Storage | 6,229 acre-ft |
| Normal Storage | 6,229 acre-ft |
| Surface Area | 406 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Briese Brothers |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 07/18/2006 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT03780 |
| Federal ID | MT03780 |
| More Info | State Dam Safety Program |