Holliday -flagstaff Lake- is an earth dam located in Meagher County, Montana, built in 1939. It carries a Low hazard potential classification.
Dam profile
NID height · 38 ft38 ft tall and 800 ft long, taller than 84% 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 Holliday -flagstaff Lake-
The primary purpose of Holliday -flagstaff Lake- is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by John B. Goodrich (private). It impounds the Flagstaff Creek near Two Dot.
The dam stands 38 feet tall and stretches 800 feet across, has a maximum storage capacity of 250 acre-feet, and collects water from a drainage area of 8 square miles. Completed in 1939, the structure is well-established, with more than 75 years of service.
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.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Montana |
| County | Meagher |
| Nearest City | Two Dot |
| River/Stream | Flagstaff Creek |
| Coordinates | 46.54780, -110.52710 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 38 ft |
| Dam Length | 800 ft |
| Year Completed | 1939 (87 years old) |
Storage & Hydraulics
| NID Storage | 250 acre-ft |
| Max Storage | 250 acre-ft |
| Normal Storage | 250 acre-ft |
| Drainage Area | 8 sq mi |
Ownership & Safety
| Purpose | Irrigation |
| Owner | John B. Goodrich |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00049 |
| Federal ID | MT00049 |
| More Info | State Dam Safety Program |