Koinenia Lake Dam is an earth dam located in Marion County, Oregon, built in 1976. It carries a Significant hazard potential classification.
Dam profile
NID height · 42 ft42 ft tall and 410 ft long, taller than 88% 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 embankment section and the water level is illustrative.
About Koinenia Lake Dam
The primary purpose of Koinenia Lake Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Cindy Jerger (private). It impounds the Pudding River, Trib to near Pratum.
The dam stands 42 feet tall and stretches 410 feet across, creates a reservoir covering 4 acres, has a maximum storage capacity of 125 acre-feet, and collects water from a drainage area of 3 square miles. Completed in 1976, the structure is 50 years old.
This dam has a significant hazard potential classification, meaning that a failure could cause significant economic damage — flooding roads, bridges, or property downstream — but is not expected to result in loss of life. The most recent inspection on record was 10/10/2018.
At 42 feet, this dam is taller than 88% of dams nationwide.
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Location
| State | Oregon |
| County | Marion |
| Nearest City | Pratum |
| River/Stream | Pudding River, Trib to |
| Coordinates | 44.91495, -122.85876 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 42 ft |
| Dam Height | 40 ft |
| Dam Length | 410 ft |
| Year Completed | 1976 (50 years old) |
Storage & Hydraulics
| NID Storage | 125 acre-ft |
| Max Storage | 125 acre-ft |
| Normal Storage | 87 acre-ft |
| Surface Area | 4 acres |
| Drainage Area | 3 sq mi |
| Max Discharge | 188 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Cindy Jerger |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/10/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00621 |
| Federal ID | OR00621 |
| More Info | State Dam Safety Program |