Pinheiro is an earth dam located in Sonoma County, California, built in 1967. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 26 ft26 ft tall and 723 ft long, taller than 55% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Pinheiro
Pinheiro is a dam in Sonoma, California. The dam is owned by Frank Escobar (private). It impounds the Tr Petaluma Rv.
The dam stands 26 feet tall and stretches 723 feet across, creates a reservoir covering 11 acres, and has a maximum storage capacity of 83 acre-feet. Completed in 1967, the structure is well into its service life at over 50 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 01/08/2026.
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Location
| State | California |
| County | Sonoma |
| River/Stream | Tr Petaluma Rv |
| Coordinates | 38.23740, -122.53230 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 723 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 83 acre-ft |
| Max Storage | 83 acre-ft |
| Surface Area | 11 acres |
Ownership & Safety
| Purpose | Other |
| Owner | Frank Escobar |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 01/08/2026 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01062 |
| Federal ID | CA01062 |
| More Info | State Dam Safety Program |