Fourmile Lake Dam
Fourmile Lake Dam is a rockfill dam located in Klamath County, Oregon, built in 1922. It carries a Low hazard potential classification.
About Fourmile Lake Dam
The primary purpose of Fourmile Lake Dam is flood risk reduction. The dam is designed to control downstream flooding by temporarily storing excess water during storms and releasing it at a controlled rate. The dam is owned by Medford Irrigation District (public utility). It impounds the Fourmile Creek near Medford.
The dam stands 25 feet tall and stretches 660 feet across, creates a reservoir covering 962 acres, has a maximum storage capacity of 15,600 acre-feet, and collects water from a drainage area of 10 square miles. Completed in 1922, 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. An emergency action plan is in place for this dam. The most recent inspection on record was 09/15/2020.
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Location
| State | Oregon |
| County | Klamath |
| Nearest City | Medford |
| River/Stream | Fourmile Creek |
| Coordinates | 42.45530, -122.24370 |
Physical Characteristics
| Dam Type | Rockfill |
| NID Height | 25 ft |
| Dam Height | 25 ft |
| Dam Length | 660 ft |
| Year Completed | 1922 (104 years old) |
Storage & Hydraulics
| NID Storage | 15,600 acre-ft |
| Max Storage | 15,600 acre-ft |
| Normal Storage | 15,600 acre-ft |
| Surface Area | 962 acres |
| Drainage Area | 10 sq mi |
| Max Discharge | 500 cfs |
| Spillway Type | Controlled |
Ownership & Safety
| Purpose | Flood Risk Reduction |
| Owner | MEDFORD IRRIGATION DISTRICT |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Not Available |
| Last Inspection | 09/15/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | OR00022 |
| Federal ID | OR00022 |
| More Info | State Dam Safety Program |