Located in Klamath, Oregon, Grohs Reservoir is a private-owned water storage facility primarily used for irrigation purposes. The reservoir, completed in 1959, spans an impressive length of 2250 feet, with a dam height of 14 feet and a hydraulic height of 11 feet. With a maximum storage capacity of 882 acre-feet and a surface area of 99 acres, Grohs Reservoir plays a crucial role in supporting agricultural activities in the region by providing a reliable water source from Rock Creek.

Despite its low hazard potential and the absence of a spillway, Grohs Reservoir is subject to state regulation, inspection, and enforcement by the Oregon Water Resources Department. The reservoir's outlet gates are equipped with a slide (sluice gate) for water release, and it is situated within close proximity to Bonanza, Oregon. With a drainage area of 10.2 square miles and a maximum discharge of 241 cubic feet per second, Grohs Reservoir serves as a vital component of the local water resource infrastructure, contributing to the sustainable management of water in the area.

In the event of an emergency, the reservoir's Emergency Action Plan (EAP) status remains unreported, and risk assessment and management measures are yet to be detailed. Despite these gaps, Grohs Reservoir continues to fulfill its role in supporting irrigation activities and maintaining water security in the region. As a significant water resource infrastructure in Klamath County, Oregon, the reservoir stands as a testament to the importance of efficient water management practices in the face of evolving climate challenges.