Carl Humphrey Dam No.1 is an earth dam located in Meade County, South Dakota, built in 1966. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 750 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 Carl Humphrey Dam No.1
The primary purpose of Carl Humphrey Dam No.1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Carl Humphrey (private). It impounds the Tr-cheyenne.
The dam stands 21 feet tall and stretches 750 feet across, and has a maximum storage capacity of 205 acre-feet. Completed in 1966, 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 | 44.20833, -102.78499 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 21 ft |
| Dam Length | 750 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 205 acre-ft |
| Max Storage | 205 acre-ft |
| Normal Storage | 150 acre-ft |
| Max Discharge | 1,400 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Carl Humphrey |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01005 |
| Federal ID | SD01005 |
| More Info | State Dam Safety Program |