Shaffer Reservoir is an earth dam located in Polk County, Oregon, built in 1987. It carries a Significant hazard potential classification.
Dam profile
NID height · 16 ft16 ft tall and 450 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 Shaffer Reservoir
The primary purpose of Shaffer Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Zena Pacific Holdings (private). It impounds the South Yamhill River, Trib to near Sheridan.
The dam stands 16 feet tall and stretches 450 feet across, creates a reservoir covering 2 acres, has a maximum storage capacity of 13 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1987, the structure is 39 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 10/11/2018.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Oregon |
| County | Polk |
| Nearest City | Sheridan |
| River/Stream | South Yamhill River, Trib to |
| Coordinates | 45.05138, -123.40976 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 16 ft |
| Dam Height | 15 ft |
| Dam Length | 450 ft |
| Year Completed | 1987 (39 years old) |
Storage & Hydraulics
| NID Storage | 13 acre-ft |
| Max Storage | 13 acre-ft |
| Normal Storage | 13 acre-ft |
| Surface Area | 2 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 160 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Zena Pacific Holdings |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/11/2018 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR03017 |
| Federal ID | OR03017 |
| More Info | State Dam Safety Program |