Big Supai Tank is an earth dam located in Coconino County, Arizona, built in 1882. It carries a Low hazard potential classification.
Dam profile
NID height · 34 ft34 ft tall and 790 ft long, taller than 78% of U.S. dams with a recorded height. 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 Big Supai Tank
Big Supai Tank is a dam in Coconino, Arizona. The dam is owned by Warren Smith Contracting, Inc. (private). It impounds the Johnson Creek near No Data.
The dam stands 34 feet tall and stretches 790 feet across, creates a reservoir covering 8 acres, has a storage capacity of 55 acre-feet, and collects water from a drainage area of 2 square miles. Completed in 1882, the structure is over a century 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 10/26/2018.
At 34 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | Arizona |
| County | Coconino |
| Nearest City | No Data |
| River/Stream | Johnson Creek |
| Coordinates | 35.23528, -112.26972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 34 ft |
| Dam Height | 34 ft |
| Dam Length | 790 ft |
| Year Completed | 1882 (144 years old) |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Normal Storage | 55 acre-ft |
| Surface Area | 8 acres |
| Drainage Area | 2 sq mi |
| Spillway Type | None |
Ownership & Safety
| Purpose | Other |
| Owner | Warren Smith Contracting, Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/26/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ00287 |
| Federal ID | AZ00287 |
| More Info | State Dam Safety Program |