Gilliland Roy No.1
Gilliland Roy No.1 is an earth dam located in Mellette County, South Dakota, built in 1960. It carries a Low hazard potential classification.
About Gilliland Roy No.1
The primary purpose of Gilliland Roy No.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 Roy Gilliland (private). It impounds the Tr Oak Creek Offstream.
The dam stands 28 feet tall and stretches 340 feet across, and has a maximum storage capacity of 28 acre-feet. Completed in 1960, 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 | Mellette |
| Nearest City | None |
| River/Stream | Tr Oak Creek Offstream |
| Coordinates | 43.62999, -100.29332 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 28 ft |
| Dam Height | 28 ft |
| Dam Length | 340 ft |
| Year Completed | 1960 (66 years old) |
Storage & Hydraulics
| NID Storage | 28 acre-ft |
| Max Storage | 28 acre-ft |
| Normal Storage | 19 acre-ft |
| Max Discharge | 278 cfs |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | ROY GILLILAND |
| Owner Type | Private |
| Hazard Classification | Low |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | SD01318 |
| Federal ID | SD01318 |
| More Info | State Dam Safety Program |