Sd Noname 20 is an earth dam located in Pennington County, South Dakota, built in 1963. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 360 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 Sd Noname 20
The primary purpose of Sd Noname 20 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Terry Marso (private). It impounds the Tr-box Elder Creek.
The dam stands 23 feet tall and stretches 360 feet across, and has a maximum storage capacity of 165 acre-feet. Completed in 1963, 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.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | South Dakota |
| County | Pennington |
| Nearest City | None |
| River/Stream | Tr-box Elder Creek |
| Coordinates | 44.09166, -102.71666 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 360 ft |
| Year Completed | 1963 (63 years old) |
Storage & Hydraulics
| NID Storage | 165 acre-ft |
| Max Storage | 165 acre-ft |
| Normal Storage | 98 acre-ft |
| Max Discharge | 1,260 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Terry Marso |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01070 |
| Federal ID | SD01070 |
| More Info | State Dam Safety Program |