Hillsboro West (Lagoon) is a key water management infrastructure located in Hillsboro, Oregon, serving as a vital resource for irrigation purposes since its completion in 1984. This earth dam structure stands at a height of 12 feet and has a hydraulic height of 9 feet, with a maximum storage capacity of 120 acre-feet. The dam spans 3000 feet in length and covers a surface area of 14.9 acres, making it a significant contributor to the local water supply.

Managed by a public utility agency and regulated by the Oregon Water Resources Department, Hillsboro West (Lagoon) plays a crucial role in the safe and efficient distribution of wastewater effluent for irrigation needs. With a low hazard potential and a history of regular inspections, this dam ensures the reliability and sustainability of water resources in the region. Equipped with outlet gates for controlled release of water, this structure exemplifies responsible water management practices in alignment with state regulations.

As part of the broader water infrastructure network in the area, Hillsboro West (Lagoon) stands as a testament to the importance of efficient water resource utilization in the face of climate challenges. With its strategic location and purposeful design, this dam serves as a cornerstone for irrigation activities, supporting agricultural productivity and environmental conservation efforts in Washington County, Oregon.