Big Rock Res. Dam is a gravity dam located in Lake County, Oregon, built in 1969. It carries a Low hazard potential classification.
Dam profile
NID height · 27 ft27 ft tall and 375 ft long, taller than 59% 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 concrete gravity section and the water level is illustrative.
About Big Rock Res. Dam
Big Rock Res. Dam is a dam in Lake, Oregon. The dam is owned by Doi BLM (federal).
The dam stands 27 feet tall and stretches 375 feet across, creates a reservoir covering 44 acres, and has a maximum storage capacity of 76 acre-feet. Completed in 1969, 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. The most recent inspection on record was 10/13/2017.
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Location
| State | Oregon |
| County | Lake |
| Coordinates | 42.57466, -119.99230 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 27 ft |
| Dam Length | 375 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 76 acre-ft |
| Max Storage | 76 acre-ft |
| Normal Storage | 41 acre-ft |
| Surface Area | 44 acres |
| Max Discharge | 3,252 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Doi BLM |
| Owner Type | Federal |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/13/2017 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00568 |
| Federal ID | OR00568 |
| More Info | State Dam Safety Program |