Sester, William H. Reservoir 1 is an earth dam located in Multnomah County, Oregon, built in 1969. It carries a Significant hazard potential classification.
Dam profile
NID height · 38 ft38 ft tall and 650 ft long, taller than 84% 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 Sester, William H. Reservoir 1
The primary purpose of Sester, William H. Reservoir 1 is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by William H. Sester (private). It impounds the Beaver Creek, Trib to near Troutdale.
The dam stands 38 feet tall and stretches 650 feet across, creates a reservoir covering 1 acres, has a maximum storage capacity of 55 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1969, 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 10/06/2016. That was over 10 years ago.
At 38 feet, this dam is taller than 84% of dams nationwide.
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Location
| State | Oregon |
| County | Multnomah |
| Nearest City | Troutdale |
| River/Stream | Beaver Creek, Trib to |
| Coordinates | 45.48023, -122.31771 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 38 ft |
| Dam Height | 32 ft |
| Dam Length | 650 ft |
| Year Completed | 1969 (57 years old) |
Storage & Hydraulics
| NID Storage | 55 acre-ft |
| Max Storage | 55 acre-ft |
| Normal Storage | 51 acre-ft |
| Surface Area | 1 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 50 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | William H. Sester |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/06/2016 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00450 |
| Federal ID | OR00450 |
| More Info | State Dam Safety Program |