Munn Reservoir is an earth dam located in Baker County, Oregon, built in 1947. It carries a Low hazard potential classification.
Dam profile
NID height · 23 ft23 ft tall and 572 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 Munn Reservoir
The primary purpose of Munn Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Elder Ranch Inc. (private). It impounds the Middle Fork Burnt River near Hereford.
The dam stands 23 feet tall and stretches 572 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 205 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1947, 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 10/22/2020.
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Location
| State | Oregon |
| County | Baker |
| Nearest City | Hereford |
| River/Stream | Middle Fork Burnt River |
| Coordinates | 44.51199, -118.25045 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 23 ft |
| Dam Height | 23 ft |
| Dam Length | 572 ft |
| Year Completed | 1947 (79 years old) |
Storage & Hydraulics
| NID Storage | 205 acre-ft |
| Max Storage | 205 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 1,450 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Elder Ranch Inc. |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 10/22/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00160 |
| Federal ID | OR00160 |
| More Info | State Dam Safety Program |