Muck Valley Afterbay
Muck Valley Afterbay is an earth dam located in Lassen County, California, built in 1990. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Muck Valley Afterbay
The primary purpose of Muck Valley Afterbay 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 Malacha Hydro Limited Partnership (private). It impounds the Pit River - Os near Pitville.
The dam stands 15 feet tall and stretches 6,200 feet across, creates a reservoir covering 30 acres, and has a storage capacity of 420 acre-feet. Completed in 1990, the structure is 36 years old.
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. Its condition is rated satisfactory, indicating no existing or potential dam safety deficiencies are recognized. The most recent inspection on record was 05/19/2022.
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Location
| State | California |
| County | Lassen |
| Nearest City | Pitville |
| River/Stream | Pit River - Os |
| Coordinates | 40.98010, -121.26180 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 15 ft |
| Dam Height | 15 ft |
| Dam Length | 6,200 ft |
| Year Completed | 1990 (36 years old) |
Storage & Hydraulics
| NID Storage | 420 acre-ft |
| Normal Storage | 420 acre-ft |
| Surface Area | 30 acres |
| Max Discharge | 700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Malacha Hydro Limited Partnership |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/19/2022 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | CA01352 |
| Federal ID | CA01352 |
| More Info | State Dam Safety Program |