Vineyard Subdivision
Vineyard Subdivision is an earth dam located in Sonoma County, California, built in 1962. It carries a Significant hazard potential classification and has a satisfactory condition assessment.
About Vineyard Subdivision
The primary purpose of Vineyard Subdivision 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 The Vineyards Club, Inc. (private). It impounds the Tr Gill Creek.
The dam stands 26 feet tall and stretches 1,660 feet across, creates a reservoir covering 25 acres, has a maximum storage capacity of 245 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1962, the structure is well into its service life at over 50 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 04/23/2025.
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Location
| State | California |
| County | Sonoma |
| River/Stream | Tr Gill Creek |
| Coordinates | 38.74670, -122.92200 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 26 ft |
| Dam Height | 26 ft |
| Dam Length | 1,660 ft |
| Year Completed | 1962 (64 years old) |
Storage & Hydraulics
| NID Storage | 245 acre-ft |
| Max Storage | 245 acre-ft |
| Surface Area | 25 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | The Vineyards Club, Inc. |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/23/2025 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01058 |
| Federal ID | CA01058 |
| More Info | State Dam Safety Program |