Oro Blanco
Oro Blanco is an earth dam located in Santa Cruz County, Arizona, built in 1950. It carries a Low hazard potential classification.
About Oro Blanco
The primary purpose of Oro Blanco is fish and wildlife pond. The dam creates habitat for fish and wildlife, supporting local ecosystems and potentially serving conservation goals. The dam is owned by Oro Blanco Ranch (private). It impounds the Oro Blanco Wash near Arivaca.
The dam stands 18 feet tall and stretches 762 feet across, creates a reservoir covering 12 acres, has a storage capacity of 67 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
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 04/04/2012. That was over 14 years ago.
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Location
| State | Arizona |
| County | Santa Cruz |
| Nearest City | Arivaca |
| River/Stream | Oro Blanco Wash |
| Coordinates | 31.49528, -111.28139 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 18 ft |
| Dam Height | 18 ft |
| Dam Length | 762 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 67 acre-ft |
| Normal Storage | 67 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 3 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Fish and Wildlife Pond |
| Owner | ORO BLANCO RANCH |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 04/04/2012 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | AZ00116 |
| Federal ID | AZ00116 |
| More Info | State Dam Safety Program |