Rock Lake, located in Haines, Oregon, is a privately owned irrigation reservoir completed in 1928. With a dam height of 28 feet and a storage capacity of 500 acre-feet, this Earth-type structure serves the primary purpose of irrigation in the area. The reservoir covers 23.7 acres and has a drainage area of 0.3 square miles, supporting agricultural activities in the region.

Managed by the Oregon Water Resources Department, Rock Lake is regulated, permitted, inspected, and enforced by state authorities to ensure its safety and functionality. Despite being classified as having a low hazard potential, the dam's condition assessment is currently listed as "Not Rated." Regular inspections are conducted every six years, with the last inspection taking place in September 2018. The reservoir's emergency action plan status, risk assessment, and management measures are not specified in the available data.

Rock Lake offers a vital water resource for irrigation in Baker County, Oregon, contributing to the agricultural productivity of the region. Enthusiasts interested in water management and climate resilience can appreciate the role of this dam in sustaining local farming operations. As climate change continues to impact water availability, the maintenance and oversight of structures like Rock Lake become increasingly important to ensure the sustainability of water resources in the area.