Long Valley West No. 2
Long Valley West No. 2 is an earth dam located in Napa County, California, built in 1982. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Long Valley West No. 2
The primary purpose of Long Valley West No. 2 is water supply. The dam stores water for municipal, industrial, or agricultural use, helping ensure a reliable supply for the surrounding area. The dam is owned by Juliana Mutual Water Company (private). It impounds the Tr Pope Creek.
The dam stands 35 feet tall and stretches 940 feet across, creates a reservoir covering 10 acres, and has a maximum storage capacity of 177 acre-feet. Completed in 1982, the structure is 44 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 01/30/2025.
At 35 feet, this dam is taller than 82% of dams nationwide.
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Location
| State | California |
| County | Napa |
| River/Stream | Tr Pope Creek |
| Coordinates | 38.64580, -122.44160 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 35 ft |
| Dam Height | 35 ft |
| Dam Length | 940 ft |
| Year Completed | 1982 (44 years old) |
Storage & Hydraulics
| NID Storage | 177 acre-ft |
| Max Storage | 177 acre-ft |
| Surface Area | 10 acres |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Juliana Mutual Water Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/30/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01292 |
| Federal ID | CA01292 |
| More Info | State Dam Safety Program |