Vanderzanden Reservoir is an earth dam located in Washington County, Oregon, built in 1967. It carries a Low hazard potential classification.
Dam profile
NID height · 21 ft21 ft tall and 240 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 Vanderzanden Reservoir
The primary purpose of Vanderzanden Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Bert Vanderzanden (private). It impounds the Mckay Creek near Hillsboro.
The dam stands 21 feet tall and stretches 240 feet across, creates a reservoir covering 18 acres, has a maximum storage capacity of 84 acre-feet, and collects water from a drainage area of 11 square miles. Completed in 1967, the structure is well into its service life at over 50 years old.
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 12/16/2014. That was over 11 years ago.
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Location
| State | Oregon |
| County | Washington |
| Nearest City | Hillsboro |
| River/Stream | Mckay Creek |
| Coordinates | 45.56332, -122.96893 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 21 ft |
| Dam Height | 19 ft |
| Dam Length | 240 ft |
| Year Completed | 1967 (59 years old) |
Storage & Hydraulics
| NID Storage | 84 acre-ft |
| Max Storage | 84 acre-ft |
| Normal Storage | 84 acre-ft |
| Surface Area | 18 acres |
| Drainage Area | 11 sq mi |
| Max Discharge | 102 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Bert Vanderzanden |
| Owner Type | Private |
| Hazard Classification | Low |
| Condition Assessment | Not assessed |
| Last Inspection | 12/16/2014 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00421 |
| Federal ID | OR00421 |
| More Info | State Dam Safety Program |