Collett
Collett is an earth dam located in Lassen County, California, built in 1991. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Collett
The primary purpose of Collett 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 - Offstream near Pitville.
The dam stands 40 feet tall and stretches 2,900 feet across, creates a reservoir covering 255 acres, and has a storage capacity of 7,800 acre-feet. Completed in 1991, the structure is 35 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 05/23/2023.
At 40 feet, this dam is taller than 87% of dams nationwide.
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Location
| State | California |
| County | Lassen |
| Nearest City | Pitville |
| River/Stream | Pit River - Offstream |
| Coordinates | 40.97280, -121.21620 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 40 ft |
| Dam Height | 40 ft |
| Dam Length | 2,900 ft |
| Year Completed | 1991 (35 years old) |
Storage & Hydraulics
| NID Storage | 7,800 acre-ft |
| Normal Storage | 7,800 acre-ft |
| Surface Area | 255 acres |
| Max Discharge | 700 cfs |
| Spillway Type | Uncontrolled |
Ownership & Safety
| Purpose | Hydroelectric |
| Owner | Malacha Hydro Limited Partnership |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 05/23/2023 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01325 |
| Federal ID | CA01325 |
| More Info | State Dam Safety Program |