Dog Hollow, a federal-owned reservoir located in Langell Valley, Oregon, serves a primary purpose of irrigation and is managed by the Bureau of Land Management. Built in 1959, this gravity dam has a hydraulic height of 13 feet and a structural height of 17 feet, with a storage capacity of 530 acre-feet. The reservoir, situated on the East Branch Lost River, covers an area of 1000 acres and has a maximum discharge of 488 cubic feet per second.

Despite being classified as having a low hazard potential, Dog Hollow has not undergone a recent condition assessment and is currently not rated for its overall state. The last inspection took place in September 2016, with a scheduled inspection frequency of every 5 years. The reservoir features a slide (sluice gate) outlet gates for water release. The surrounding area, managed by the Bureau of Land Management, offers a vital water resource for agricultural purposes in the region.

For water resource and climate enthusiasts, Dog Hollow presents an intriguing case study of a mid-century irrigation reservoir that continues to provide essential water supply for the local community. With its historical significance and ongoing management by federal agencies, this gravity dam stands as a testament to the intersection of water management, infrastructure development, and environmental stewardship in the Klamath region of Oregon.