Cyclone
Cyclone is an earth dam located in Apache County, Arizona, built in 1965. It carries a High hazard potential classification and has a poor condition assessment.
About Cyclone
The primary purpose of Cyclone is recreation. The dam creates a reservoir used for recreational activities such as fishing, boating, and swimming. The dam is owned by Bia (federal). It impounds the Sand Creek near Upper Log Campground.
The dam stands 50 feet tall and stretches 360 feet across, creates a reservoir covering 38 acres, has a maximum storage capacity of 915 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1965, the structure is well into its service life at over 50 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated poor, meaning the dam has recognized safety deficiencies that require remediation to address risks. An emergency action plan is in place for this dam. The most recent inspection on record was 08/25/2020.
At 50 feet, this dam is taller than 93% of dams nationwide.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Arizona dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Arizona |
| County | Apache |
| Nearest City | Upper Log Campground |
| River/Stream | Sand Creek |
| Coordinates | 34.01520, -109.73740 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 50 ft |
| Dam Height | 50 ft |
| Dam Length | 360 ft |
| Year Completed | 1965 (61 years old) |
Storage & Hydraulics
| NID Storage | 915 acre-ft |
| Max Storage | 915 acre-ft |
| Normal Storage | 775 acre-ft |
| Surface Area | 38 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 699 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Recreation |
| Owner | BIA |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Poor |
| Last Inspection | 08/25/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | AZ10431 |
| Federal ID | AZ10431 |
| More Info | State Dam Safety Program |