Brock, located in Buffalo, Wyoming, is a privately owned Earth dam constructed in 1964 for irrigation purposes on Cummings Creek. With a height of 25 feet and a hydraulic height of 20 feet, Brock has a storage capacity of 86 acre-feet and a surface area of 6 acres. The dam is primarily made of stone core and soil foundation, with an uncontrolled spillway that is 170 feet wide.

Despite being classified as having a low hazard potential, Brock is currently in poor condition according to its last inspection in April 2020. The dam is inspected every 5 years, and its risk assessment is moderate. While the dam is not under the jurisdiction of any federal agency, it is regulated by the State of Wyoming through the State Engineer's Office, with permitting, inspection, and enforcement in place to ensure safety and compliance.

Climate and water resource enthusiasts interested in Brock can appreciate its historical significance in the region, as well as the ongoing efforts to maintain its integrity and safety. With its unique design features and location in the picturesque Johnson County, Brock serves as a vital irrigation resource for the local community, highlighting the importance of sustainable water management practices in the face of changing climatic conditions.