T. Mason is an earth dam located in Meade County, South Dakota, built in 1962. It carries a Low hazard potential classification.
Dam profile
NID height · 13 ft13 ft tall and 480 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 T. Mason
The primary purpose of T. Mason 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 T. Mason (private). It impounds the Tr Cheyenne.
The dam stands 13 feet tall and stretches 480 feet across, and has a maximum storage capacity of 78 acre-feet. Completed in 1962, 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 | South Dakota |
| County | Meade |
| Nearest City | None |
| River/Stream | Tr Cheyenne |
| Coordinates | 44.91999, -102.10499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 13 ft |
| Dam Height | 13 ft |
| Dam Length | 480 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 78 acre-ft |
| Max Storage | 78 acre-ft |
| Normal Storage | 20 acre-ft |
| Max Discharge | 4,400 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | T. Mason |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00418 |
| Federal ID | SD00418 |
| More Info | State Dam Safety Program |