Tualatin Park is a private water resource in Oregon, situated along the Tualatin River, serving primarily for irrigation purposes since its completion in 1970. The park features an earth dam standing at 23 feet high and stretching 300 feet in length, with a storage capacity of 28 acre-feet and a surface area of 4.4 acres. Despite its small drainage area of 0.5 square miles, the dam has a significant hazard potential, necessitating regular inspections every three years to ensure its structural integrity.

Owned by a private entity, Tualatin Park is regulated by the Oregon Water Resources Department and falls under state jurisdiction for permitting, inspection, and enforcement. It boasts a picturesque location in Washington County's Nasoma city, attracting water resource and climate enthusiasts alike. The dam's primary purpose of irrigation is essential for fire protection, stock watering, and creating small fish ponds, showcasing its versatility in meeting various water resource needs within the area. With Suzanne Bonamici representing the park's congressional district, Tualatin Park remains a vital water source in the region, contributing significantly to its water management efforts.