Udall is an earth dam located in Apache County, Arizona, built in 1910. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 423 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 Udall
The primary purpose of Udall is debris control. The dam is designed to catch sediment, rocks, and debris carried by flowing water — particularly important in areas prone to mudslides or heavy erosion. The dam is owned by H. J. Platt (private). It impounds the Little Colorado River near Hunt.
The dam stands 24 feet tall and stretches 423 feet across, has a maximum storage capacity of 5,000 acre-feet, and collects water from a drainage area of 2,300 square miles. Completed in 1910, 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 06/08/2006. That was over 20 years ago.
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Location
| State | Arizona |
| County | Apache |
| Nearest City | Hunt |
| River/Stream | Little Colorado River |
| Coordinates | 34.60917, -109.47972 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 24 ft |
| Dam Height | 24 ft |
| Dam Length | 423 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 5,000 acre-ft |
| Max Storage | 5,000 acre-ft |
| Drainage Area | 2,300 sq mi |
| Max Discharge | 500 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Debris Control |
| Owner | H. J. Platt |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 06/08/2006 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ00187 |
| Federal ID | AZ00187 |
| More Info | State Dam Safety Program |