San Justo Dike is an earth dam located in San Benito County, California, built in 1987. It carries a High hazard potential classification.
Dam profile
NID height · 69 ft69 ft tall and 918 ft long, taller than 96% of U.S. dams with a recorded height. Height is drawn to scale against a ten-story building, about 100 ft; the profile is a generic embankment section and the water level is illustrative.
About San Justo Dike
The primary purpose of San Justo Dike is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bureau of Reclamation (federal). It impounds the San Benito River Os near Pacines.
The dam stands 69 feet tall and stretches 918 feet across, creates a reservoir covering 208 acres, and has a maximum storage capacity of 11,693 acre-feet. Completed in 1987, the structure is 39 years old.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. An emergency action plan is in place for this dam. The most recent inspection on record was 07/10/2020.
At 69 feet, this dam is taller than 96% of all dams in the United States.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The California dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | California |
| County | San Benito |
| Nearest City | Pacines |
| River/Stream | San Benito River Os |
| Coordinates | 36.82710, -121.44470 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 69 ft |
| Dam Height | 69 ft |
| Dam Length | 918 ft |
| Year Completed | 1987 (39 years old) |
Storage & Hydraulics
| NID Storage | 11,693 acre-ft |
| Max Storage | 11,693 acre-ft |
| Normal Storage | 10,308 acre-ft |
| Surface Area | 208 acres |
| Spillway Type | None |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bureau of Reclamation |
| Owner Type | Federal |
| Hazard Classification | High |
| Condition Assessment | Not assessed |
| Last Inspection | 07/10/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA10323 |
| Federal ID | CA10323S001 |
| More Info | State Dam Safety Program |