Chapman Reservoir, located in Pitkin County, Colorado, is a concrete dam built in 1938 for recreational purposes and to support fish and wildlife. The reservoir has a storage capacity of 190 acre-feet and a maximum discharge of 376 cubic feet per second. The dam stands at 38 feet high and spans 160 feet in length, with an uncontrolled spillway width of 6 feet.

Managed by the Forest Service, Chapman Reservoir is used for recreation and serves as a fish and wildlife pond. The dam is regulated by state agencies for permitting, inspection, and enforcement to ensure safety and compliance. Despite its high hazard potential, the reservoir's condition assessment is currently not rated, and risk management measures are not specified.

Water resource and climate enthusiasts will appreciate Chapman Reservoir's historical significance and its role in providing recreational opportunities and supporting local wildlife. With its unique design and regulatory oversight, the reservoir serves as a vital water management structure in the Frying Pan Ditch Diversion system, contributing to the sustainable use of water resources in the area.