Mckays Point Diversion
Mckays Point Diversion is an arch dam located in Tuolumne County, California, built in 1989. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Mckays Point Diversion
The primary purpose of Mckays Point Diversion is hydroelectric. The dam generates hydroelectric power by channeling water through turbines, converting the energy of flowing water into electricity. The dam is owned by Calaveras County Water District (public utility). It impounds the North Fork Stanislaus River near Murphys.
The dam stands 242 feet tall and stretches 820 feet across, creates a reservoir covering 34 acres, has a maximum storage capacity of 2,930 acre-feet, and collects water from a drainage area of 166 square miles. Completed in 1989, the structure is 37 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. An emergency action plan is in place for this dam. The most recent inspection on record was 08/09/2022.
At 242 feet, this dam is taller than 99% of all dams in the United States.
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Location
| State | California |
| County | Tuolumne |
| Nearest City | Murphys |
| River/Stream | North Fork Stanislaus River |
| Coordinates | 38.23320, -120.29210 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 242 ft |
| Dam Height | 242 ft |
| Dam Length | 820 ft |
| Year Completed | 1989 (37 years old) |
Storage & Hydraulics
| NID Storage | 2,930 acre-ft |
| Max Storage | 2,930 acre-ft |
| Normal Storage | 2,248 acre-ft |
| Surface Area | 34 acres |
| Drainage Area | 166 sq mi |
| Max Discharge | 82,800 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Calaveras County Water District |
| Owner Type | Public Utility |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 08/09/2022 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01257 |
| Federal ID | CA01257 |
| More Info | State Dam Safety Program |