Union Auxiliary No. 7
Low HazardSatisfactory ConditionEmergency Action Plan: Not Required
Location
| State | California |
| County | Alpine |
| Nearest City | Dorrington |
| River/Stream | North Fork Stanislaus River - |
| Coordinates | 38.43480, -119.99450 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 7 ft |
| Dam Height | 7 ft |
| Dam Length | 52 ft |
| Year Completed | 1910 (116 years old) |
Storage & Hydraulics
| NID Storage | 3,283 acre-ft |
| Max Storage | 3,283 acre-ft |
| Normal Storage | 3,130 acre-ft |
| Surface Area | 215 acres |
| Drainage Area | 15 sq mi |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Northern California Power Agency |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/09/2022 |
| Emergency Action Plan | Not Required |