Dwight Hammond is an earth dam located in Siskiyou County, California, built in 1959. It carries a Low hazard potential classification and has a satisfactory condition assessment.
Dam profile
NID height · 25 ft25 ft tall and 720 ft long, taller than 50% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Dwight Hammond
The primary purpose of Dwight Hammond 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 Hammond Lake Irrigation Association (private). It impounds the Tr Shasta River.
The dam stands 25 feet tall and stretches 720 feet across, creates a reservoir covering 58 acres, has a maximum storage capacity of 348 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1959, 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 10/07/2024.
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Location
| State | California |
| County | Siskiyou |
| River/Stream | Tr Shasta River |
| Coordinates | 41.38180, -122.41820 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 720 ft |
| Year Completed | 1959 (67 years old) |
Storage & Hydraulics
| NID Storage | 348 acre-ft |
| Max Storage | 348 acre-ft |
| Surface Area | 58 acres |
| Drainage Area | 0 sq mi |
Ownership & Safety
| Purpose | Water Supply |
| Owner | Hammond Lake Irrigation Association |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Satisfactory |
| Last Inspection | 10/07/2024 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA00929 |
| Federal ID | CA00929 |
| More Info | State Dam Safety Program |