Simpson Reservoir, also known as Ramsey Canyon Dam, is a privately owned water resource located in Jackson, Oregon. Built in 1967, this earth dam serves the primary purpose of irrigation along the Ramsey Canyon stream. With a storage capacity of 90 acre-feet, the reservoir covers a surface area of 8.17 acres and has a drainage area of 0.18 square miles.

Managed by the Natural Resources Conservation Service, Simpson Reservoir stands at a height of 27 feet and has a hydraulic height of 24 feet. Despite its low hazard potential and an unassessed condition, the reservoir is subject to regular state inspections, permitting, and enforcement to ensure its safety and compliance with regulations. With a maximum discharge capacity of 35 cubic feet per second, the dam plays a crucial role in supporting agricultural activities in the region.

Situated in Rogue River, Oregon, Simpson Reservoir remains a vital water source for irrigation purposes in the area. Its construction and operation are overseen by the Oregon Water Resources Department, highlighting the importance of proper water management and infrastructure maintenance in the face of changing climate patterns and water resource challenges. As a key player in the local water supply system, the reservoir contributes to the sustainable use of water resources in Jackson County and serves as a valuable asset for the community.