Olson Flashboard Dam
Olson Flashboard Dam is an other dam located in Yamhill County, Oregon, built in 1975. It carries a Significant hazard potential classification.
About Olson Flashboard Dam
The primary purpose of Olson Flashboard Dam is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Flying Hills Farm (private). It impounds the Ash Swale near Amity.
The dam stands 16 feet tall and stretches 180 feet across, creates a reservoir covering 13 acres, has a maximum storage capacity of 160 acre-feet, and collects water from a drainage area of 36 square miles. Completed in 1975, the structure is well into its service life at over 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 10/22/2020.
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Location
| State | Oregon |
| County | Yamhill |
| Nearest City | Amity |
| River/Stream | Ash Swale |
| Coordinates | 45.09376, -123.19069 |
Physical Characteristics
| Dam Type | Other |
| NID Height | 16 ft |
| Dam Height | 14 ft |
| Dam Length | 180 ft |
| Year Completed | 1975 (51 years old) |
Storage & Hydraulics
| NID Storage | 160 acre-ft |
| Max Storage | 160 acre-ft |
| Normal Storage | 93 acre-ft |
| Surface Area | 13 acres |
| Drainage Area | 36 sq mi |
| Max Discharge | 5,000 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | FLYING HILLS FARM |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not Rated |
| Last Inspection | 10/22/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00659 |
| Federal ID | OR00659 |
| More Info | State Dam Safety Program |