Lyle Reservoir
Lyle Reservoir is a gravity dam located in Jefferson County, Oregon, built in 1911. It carries a Low hazard potential classification.
About Lyle Reservoir
The primary purpose of Lyle Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by R. Dunsmore (private). It impounds the Wilson Creek near Maupin.
The dam stands 15 feet tall and stretches 740 feet across, creates a reservoir covering 10 acres, has a maximum storage capacity of 103 acre-feet, and collects water from a drainage area of 49 square miles. Completed in 1911, 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 03/05/1990. That was over 36 years ago.
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Location
| State | Oregon |
| County | Jefferson |
| Nearest City | Maupin |
| River/Stream | Wilson Creek |
| Coordinates | 44.72662, -120.97230 |
Physical Characteristics
| Dam Type | Gravity |
| NID Height | 15 ft |
| Dam Height | 12 ft |
| Dam Length | 740 ft |
| Year Completed | 1911 (115 years old) |
Storage & Hydraulics
| NID Storage | 103 acre-ft |
| Max Storage | 103 acre-ft |
| Normal Storage | 103 acre-ft |
| Surface Area | 10 acres |
| Drainage Area | 49 sq mi |
| Max Discharge | 140 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | R. DUNSMORE |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 03/05/1990 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00029 |
| Federal ID | OR00029 |
| More Info | State Dam Safety Program |