Chapman Upper, located in Malheur, Oregon, is a privately owned irrigation dam completed in 1948 on Granite Creek, a tributary to the Malheur River. This earth dam stands at a height of 15 feet and has a maximum storage capacity of 500 acre-feet, with a normal storage level of 223 acre-feet over its 8.17-acre surface area. The dam serves the primary purpose of irrigation in the region and is regulated by the Oregon Water Resources Department.

With a low hazard potential and a condition assessment that is currently not rated, Chapman Upper is a vital water resource infrastructure in the area. The dam's inspection frequency is every 6 years, with the last inspection conducted in May 2016. In case of emergencies, the dam is equipped with a slide (sluice gate) outlet gate for controlled water release. Although there are no associated structures with the dam, its presence plays a crucial role in supporting agricultural activities and water management in the Riverside region.

As a significant component of the water supply system in Malheur County, Chapman Upper showcases the importance of sustainable water resource management for irrigation purposes. With its historical completion in 1948 and ongoing regulatory oversight by the Oregon Water Resources Department, this dam stands as a testament to the intersection of water resource development, climate resilience, and agricultural sustainability in the region. The infrastructure's role in supporting the local economy and ecosystem highlights the interconnectedness of water resources and climate considerations for a thriving community like Riverside.