Maple Headquarters Reservoir is an earth dam located in Washington County, Oregon, built in 1986. It carries a Significant hazard potential classification.
Dam profile
NID height · 19 ft19 ft tall and 900 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 Maple Headquarters Reservoir
The primary purpose of Maple Headquarters Reservoir is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Munger Hortifruit North America LLC (private). It impounds the Dairy Creek, Trib to near Hillsboro.
The dam stands 19 feet tall and stretches 900 feet across, creates a reservoir covering 9 acres, has a maximum storage capacity of 100 acre-feet, and collects water from a drainage area of 0 square miles. Completed in 1986, the structure is 40 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 10/25/2020.
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Location
| State | Oregon |
| County | Washington |
| Nearest City | Hillsboro |
| River/Stream | Dairy Creek, Trib to |
| Coordinates | 45.59701, -123.14202 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 19 ft |
| Dam Height | 19 ft |
| Dam Length | 900 ft |
| Year Completed | 1986 (40 years old) |
Storage & Hydraulics
| NID Storage | 100 acre-ft |
| Max Storage | 100 acre-ft |
| Normal Storage | 72 acre-ft |
| Surface Area | 9 acres |
| Drainage Area | 0 sq mi |
| Max Discharge | 80 cfs |
Ownership & Safety
| Purpose | Irrigation |
| Owner | Munger Hortifruit North America LLC |
| Owner Type | Private |
| Hazard Classification | Significant |
| Condition Assessment | Not assessed |
| Last Inspection | 10/25/2020 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00657 |
| Federal ID | OR00657 |
| More Info | State Dam Safety Program |