Goc Number 1 is an earth dam located in Hughes County, South Dakota, built in 1952. It carries a Significant hazard potential classification.
Dam profile
NID height · 17 ft17 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 Goc Number 1
The primary purpose of Goc Number 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 H.d. Goc (private). It impounds the Tr-medicine Knoll Creek near Canning.
The dam stands 17 feet tall and stretches 360 feet across, and has a maximum storage capacity of 87 acre-feet. Completed in 1952, 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 | South Dakota |
| County | Hughes |
| Nearest City | Canning |
| River/Stream | Tr-medicine Knoll Creek |
| Coordinates | 44.50499, -99.95332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 17 ft |
| Dam Height | 17 ft |
| Dam Length | 360 ft |
| Year Completed | 1952 (74 years old) |
Storage & Hydraulics
| NID Storage | 87 acre-ft |
| Max Storage | 87 acre-ft |
| Normal Storage | 39 acre-ft |
| Max Discharge | 180 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | H.d. Goc |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD00909 |
| Federal ID | SD00909 |
| More Info | State Dam Safety Program |