Olson (richland) is an earth dam located in Richland County, Montana, built in 1958. It carries a Significant hazard potential classification.
Dam profile
NID height · 30 ft30 ft tall and 300 ft long, taller than 68% 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 Olson (richland)
The primary purpose of Olson (richland) 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 Buxbaum Bros (private). It impounds the Tr-o'brien Creek near Sidney.
The dam stands 30 feet tall and stretches 300 feet across, has a maximum storage capacity of 248 acre-feet, and collects water from a drainage area of 6 square miles. Completed in 1958, 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 | Richland |
| Nearest City | Sidney |
| River/Stream | Tr-o'brien Creek |
| Coordinates | 47.55410, -104.09270 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 300 ft |
| Year Completed | 1958 (68 years old) |
Storage & Hydraulics
| NID Storage | 248 acre-ft |
| Max Storage | 248 acre-ft |
| Normal Storage | 127 acre-ft |
| Drainage Area | 6 sq mi |
| Max Discharge | 364 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Buxbaum Bros |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | MT00350 |
| Federal ID | MT00350 |
| More Info | State Dam Safety Program |