Upper Centennial Control Structure is a gravity dam located in La Paz County, Arizona, built in 1956. It carries a Low hazard potential classification.
Dam profile
NID height · 50 ft50 ft tall and 900 ft long, taller than 92% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic concrete gravity section and the water level is illustrative.
About Upper Centennial Control Structure
The primary purpose of Upper Centennial Control Structure is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Doi BLM (federal). It impounds the Gila - Offstream near Wenden, Az.
The dam stands 50 feet tall and stretches 900 feet across, and has a maximum storage capacity of 900 acre-feet. Completed in 1956, 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. The most recent inspection on record was 10/04/2011. That was over 15 years ago.
At 50 feet, this dam is taller than 92% of dams nationwide.
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Location
| State | Arizona |
| County | La Paz |
| Nearest City | Wenden, Az |
| River/Stream | Gila - Offstream |
| Coordinates | 33.91836, -113.38742 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 50 ft |
| Dam Length | 900 ft |
| Year Completed | 1956 (70 years old) |
Storage & Hydraulics
| NID Storage | 900 acre-ft |
| Max Storage | 900 acre-ft |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/04/2011 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ20030 |
| Federal ID | AZ20030 |
| More Info | State Dam Safety Program |