Lyman Dam
High HazardFair ConditionEmergency Action Plan: Yes
Location
| State | Arizona |
| County | Apache |
| Nearest City | ST. JOHNS |
| River/Stream | LITTLE COLORADO RIVER |
| Coordinates | 34.36972, -109.38333 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 60 ft |
| Dam Height | 60 ft |
| Dam Length | 800 ft |
| Year Completed | 1912 (114 years old) |
Storage & Hydraulics
| NID Storage | 44,500 acre-ft |
| Max Storage | 44,500 acre-ft |
| Normal Storage | 30,600 acre-ft |
| Surface Area | 1,324 acres |
| Drainage Area | 790 sq mi |
| Max Discharge | 15,000 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Irrigation |
| Owner | ARIZONA STATE PARKS;GROVERS HILL IRRIGATION DISTRICT |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 09/05/2024 |
| Emergency Action Plan | Yes |