Thurman is an earth dam located in Shasta County, California, built in 1966. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 63 ft63 ft tall and 350 ft long, taller than 95% 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 Thurman
The primary purpose of Thurman 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 Alan and Sherry Shufelberger (private). It impounds the Slaughter Pole Cr.
The dam stands 63 feet tall and stretches 350 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 140 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1966, the structure is well into its service life at over 50 years old.
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 06/25/2025.
At 63 feet, this dam is taller than 95% of all dams in the United States.
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Location
| State | California |
| County | Shasta |
| River/Stream | Slaughter Pole Cr |
| Coordinates | 40.66250, -121.95150 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 63 ft |
| Dam Height | 63 ft |
| Dam Length | 350 ft |
| Year Completed | 1966 (60 years old) |
Storage & Hydraulics
| NID Storage | 140 acre-ft |
| Max Storage | 140 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Alan and Sherry Shufelberger |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 06/25/2025 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA01052 |
| Federal ID | CA01052 |
| More Info | State Dam Safety Program |