Johnson #1
Johnson #1 is an earth dam located in Rosebud County, Montana, built in 1955. It carries a Low hazard potential classification.
About Johnson #1
The primary purpose of Johnson #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 Ted Johnson (private). It impounds the Living Ash Creek near Forsyth.
The dam stands 20 feet tall and stretches 500 feet across, and has a maximum storage capacity of 155 acre-feet. Completed in 1955, 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 | Rosebud |
| Nearest City | Forsyth |
| River/Stream | Living Ash Creek |
| Coordinates | 46.48570, -106.87130 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 20 ft |
| Dam Height | 20 ft |
| Dam Length | 500 ft |
| Year Completed | 1955 (71 years old) |
Storage & Hydraulics
| NID Storage | 155 acre-ft |
| Max Storage | 155 acre-ft |
| Normal Storage | 95 acre-ft |
| Max Discharge | 700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | TED JOHNSON |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT01931 |
| Federal ID | MT01931 |
| More Info | State Dam Safety Program |