Hillsboro West (lagoon)
Hillsboro West (lagoon) is an earth dam located in Washington County, Oregon, built in 1984. It carries a Low hazard potential classification.
About Hillsboro West (lagoon)
The primary purpose of Hillsboro West (lagoon) is irrigation. The dam stores and diverts water for agricultural irrigation, supporting farming operations in the surrounding area. The dam is owned by Unfied Sewage Agency Of Washington County (public utility). It impounds the Wastewater Effluent near Hillsboro.
The dam stands 12 feet tall and stretches 3,000 feet across, creates a reservoir covering 14 acres, and has a maximum storage capacity of 120 acre-feet. Completed in 1984, the structure is 42 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 09/30/2015. That was over 10 years ago.
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Location
| State | Oregon |
| County | Washington |
| Nearest City | Hillsboro |
| River/Stream | Wastewater Effluent |
| Coordinates | 45.49952, -122.98389 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 12 ft |
| Dam Height | 12 ft |
| Dam Length | 3,000 ft |
| Year Completed | 1984 (42 years old) |
Storage & Hydraulics
| NID Storage | 120 acre-ft |
| Max Storage | 120 acre-ft |
| Normal Storage | 120 acre-ft |
| Surface Area | 14 acres |
Ownership & Safety
| Purpose | Irrigation |
| Owner | UNFIED SEWAGE AGENCY OF WASHINGTON COUNTY |
| Owner Type | Public Utility |
| Hazard Classification | Low |
| Condition Assessment | Not Rated |
| Last Inspection | 09/30/2015 |
| Emergency Action Plan | Not Required |
Identifiers
| NID ID | OR00691 |
| Federal ID | OR00691 |
| More Info | State Dam Safety Program |