Henry Jr.
Henry Jr. is an arch dam located in San Diego County, California, built in 1929. It carries a Low hazard potential classification and has a satisfactory condition assessment.
About Henry Jr.
The primary purpose of Henry Jr. 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 Charlotte Frye (private). It impounds the Skye Valley.
The dam stands 33 feet tall and stretches 249 feet across, creates a reservoir covering 22 acres, has a maximum storage capacity of 196 acre-feet, and collects water from a drainage area of 9 square miles. Completed in 1929, the structure is well-established, with more than 75 years of service.
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 04/22/2025.
At 33 feet, this dam is taller than 78% of dams nationwide.
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Location
| State | California |
| County | San Diego |
| River/Stream | Skye Valley |
| Coordinates | 32.71360, -116.65220 |
Physical Characteristics
| Dam Type | Arch |
| NID Height | 33 ft |
| Dam Height | 33 ft |
| Dam Length | 249 ft |
| Year Completed | 1929 (97 years old) |
Storage & Hydraulics
| NID Storage | 196 acre-ft |
| Max Storage | 196 acre-ft |
| Surface Area | 22 acres |
| Drainage Area | 9 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Charlotte Frye |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 04/22/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00777 |
| Federal ID | CA00777 |
| More Info | State Dam Safety Program |