28 Tank is an earth dam located in Yavapai County, Arizona, built in 1909. It carries a Low hazard potential classification.
Dam profile
NID height · 33 ft33 ft tall and 382 ft long, taller than 76% 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 28 Tank
The primary purpose of 28 Tank 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 Osborn - Blair Inter. (private). It impounds the Spring Valley Wash near Supai Village.
The dam stands 33 feet tall and stretches 382 feet across, creates a reservoir covering 16 acres, and has a storage capacity of 181 acre-feet. Completed in 1909, 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 04/12/2012. That was over 14 years ago.
At 33 feet, this dam is taller than 76% of dams nationwide.
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Location
| State | Arizona |
| County | Yavapai |
| Nearest City | Supai Village |
| River/Stream | Spring Valley Wash |
| Coordinates | 35.36472, -113.03000 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 382 ft |
| Year Completed | 1909 (117 years old) |
Storage & Hydraulics
| NID Storage | 181 acre-ft |
| Normal Storage | 181 acre-ft |
| Surface Area | 16 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fire Protection, Stock, Or Small Fish Pond |
| Owner | Osborn - Blair Inter. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 04/12/2012 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ00247 |
| Federal ID | AZ00247 |
| More Info | State Dam Safety Program |