Orwick Dam (BLM) is a dam located in Tehama County, California, built in 1950. It carries a Low hazard potential classification.
Dam profile
NID height · 22 ft22 ft tall and 421 ft long. 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 Orwick Dam (BLM)
The primary purpose of Orwick Dam (BLM) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Doi BLM (federal). It impounds the None.
The dam stands 22 feet tall and stretches 421 feet across, creates a reservoir covering 12 acres, has a maximum storage capacity of 88 acre-feet, and collects water from a drainage area of 1 square miles. Completed in 1950, the structure is well-established, with more than 75 years of service.
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. The most recent inspection on record was 07/21/2011. That was over 15 years ago.
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Location
| State | California |
| County | Tehama |
| Nearest City | None |
| River/Stream | None |
| Coordinates | 40.32499, -122.17705 |
Physical Characteristics
| NID Height | 22 ft |
| Dam Length | 421 ft |
| Year Completed | 1950 (76 years old) |
Storage & Hydraulics
| NID Storage | 88 acre-ft |
| Max Storage | 88 acre-ft |
| Normal Storage | 88 acre-ft |
| Surface Area | 12 acres |
| Drainage Area | 1 sq mi |
| Max Discharge | 1 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 07/21/2011 |
| Emergency Action Plan | No |
Identifiers
| NID ID | CA10355 |
| Federal ID | CA10355 |
| More Info | State Dam Safety Program |