Oneal Lake is an earth dam located in Yavapai County, Arizona, built in 1894. It carries a Low hazard potential classification.
Dam profile
NID height · 10 ft10 ft tall and 560 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 Oneal Lake
The primary purpose of Oneal Lake is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Murphy Ventures LLC (private). It impounds the Unknown near No Data.
The dam stands 10 feet tall and stretches 560 feet across, creates a reservoir covering 13 acres, and has a storage capacity of 88 acre-feet. Completed in 1894, 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 05/08/2020.
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Location
| State | Arizona |
| County | Yavapai |
| Nearest City | No Data |
| River/Stream | Unknown |
| Coordinates | 34.26417, -112.95333 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 10 ft |
| Dam Height | 10 ft |
| Dam Length | 560 ft |
| Year Completed | 1894 (132 years old) |
Storage & Hydraulics
| NID Storage | 88 acre-ft |
| Normal Storage | 88 acre-ft |
| Surface Area | 13 acres |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Murphy Ventures LLC |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 05/08/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ00319 |
| Federal ID | AZ00319 |
| More Info | State Dam Safety Program |