Phillippi #1 is an earth dam located in Carter County, Montana, built in 1952. It carries a Significant hazard potential classification.
Dam profile
NID height · 20 ft20 ft tall and 200 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 Phillippi #1
The primary purpose of Phillippi #1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Lester Phillipi (private). It impounds the Soda Creek near Marmarth N-dakota.
The dam stands 20 feet tall and stretches 200 feet across, and has a maximum storage capacity of 235 acre-feet. Completed in 1952, the structure is well into its service life at over 50 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.
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Location
| State | Montana |
| County | Carter |
| Nearest City | Marmarth N-dakota |
| River/Stream | Soda Creek |
| Coordinates | 45.33100, -104.81590 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 200 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 235 acre-ft |
| Max Storage | 235 acre-ft |
| Normal Storage | 99 acre-ft |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Lester Phillipi |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT02403 |
| Federal ID | MT02403 |
| More Info | State Dam Safety Program |