Graham is a private irrigation dam located in Forest Grove, Oregon, on the banks of Dilley Creek. Built in 1961, this Earth-type dam stands at 33.5 feet tall and stretches 550 feet in length. It serves the primary purpose of irrigation, with a storage capacity of 180 acre-feet and a maximum storage of 220 acre-feet. The dam covers a surface area of 15.25 acres and has a drainage area of 0.57 square miles.

Managed by the Natural Resources Conservation Service, Graham has a low hazard potential and has not been rated for its condition assessment. Despite its age, the dam has undergone inspections every 6 years, with the last one conducted in November 2016. State-regulated and permitted, Graham is subject to regular inspections, enforcement, and oversight by the Oregon Water Resources Department. Situated in Washington County, Oregon, this dam plays a crucial role in supporting local agriculture through its irrigation capabilities.

With a hydraulic height of 28 feet and a NID height of 34 feet, Graham is a vital water resource structure in the region. Its presence helps ensure water availability for agricultural activities and contributes to the overall water management efforts in the area. As a privately owned dam, Graham stands as a testament to the collaboration between private landowners and state agencies in sustaining water resources for the benefit of the community.