Sinaloa Lake
Sinaloa Lake is an earth dam located in Ventura County, California, built in 1925. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Sinaloa Lake
Sinaloa Lake is a dam in Ventura, California. The dam is owned by Sinola Lake Owners Association (private). It impounds the Tr Arroyo Simi near Simi Valley.
The dam stands 30 feet tall and stretches 800 feet across, creates a reservoir covering 15 acres, has a maximum storage capacity of 205 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1925, the structure is over a century 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. 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 12/02/2024.
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 | Ventura |
| Nearest City | Simi Valley |
| River/Stream | Tr Arroyo Simi |
| Coordinates | 34.25770, -118.79240 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 30 ft |
| Dam Height | 30 ft |
| Dam Length | 800 ft |
| Year Completed | 1925 (101 years old) |
Storage & Hydraulics
| NID Storage | 205 acre-ft |
| Max Storage | 205 acre-ft |
| Surface Area | 15 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Other |
| Owner | Sinola Lake Owners Association |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 12/02/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01018 |
| Federal ID | CA01018 |
| More Info | State Dam Safety Program |