Mineral Hot Springs Lake
Mineral Hot Springs Lake is an earth dam located in San Bernardino County, California, built in 1967. It carries a High hazard potential classification and has a satisfactory condition assessment.
About Mineral Hot Springs Lake
The primary purpose of Mineral Hot Springs Lake 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 San Manuel Band Of Mission Indians (private). It impounds the Tr East Twin Cr near San Bernardino.
The dam stands 54 feet tall and stretches 200 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 31 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1967, the structure is well into its service life at over 50 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. 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 11/14/2024.
At 54 feet, this dam is taller than 94% of dams nationwide.
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 Bernardino |
| Nearest City | San Bernardino |
| River/Stream | Tr East Twin Cr |
| Coordinates | 34.18360, -117.26800 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 54 ft |
| Dam Height | 54 ft |
| Dam Length | 200 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 31 acre-ft |
| Max Storage | 31 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | San Manuel Band of Mission Indians |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Satisfactory |
| Last Inspection | 11/14/2024 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | CA01026 |
| Federal ID | CA01026 |
| More Info | State Dam Safety Program |