Twin Lake-lower is a concrete dam located in Baker County, Oregon, built in 1908. It carries a Low hazard potential classification.
Dam profile
NID height · 24 ft24 ft tall and 150 ft long. 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 Twin Lake-lower
The primary purpose of Twin Lake-lower is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Pine Lakes Ditch & Res. Company (private). It impounds the West Fork Pine Creek near Cornucopia.
The dam stands 24 feet tall and stretches 150 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 75 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1908, the structure is over a century 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 08/13/2019.
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Location
| State | Oregon |
| County | Baker |
| Nearest City | Cornucopia |
| River/Stream | West Fork Pine Creek |
| Coordinates | 45.03638, -117.25058 |
Physical Characteristics
| Dam Type | Concrete |
| NID Height | 24 ft |
| Dam Height | 22 ft |
| Dam Length | 150 ft |
| Year Completed | 1908 (118 years old) |
Storage & Hydraulics
| NID Storage | 75 acre-ft |
| Max Storage | 75 acre-ft |
| Normal Storage | 75 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 115 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Pine Lakes Ditch & Res. Company |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 08/13/2019 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00610 |
| Federal ID | OR00610 |
| More Info | State Dam Safety Program |