Jacobs is a privately owned dam located in Island Park Reservoir, Idaho. Built in 1935, this earth dam stands at a height of 19 feet and has a hydraulic height of 13.8 feet. It spans 570 feet in length and has a storage capacity of 75 acre-feet. The dam is situated on Blue Lake Sheep Creek and serves a variety of purposes, with a primary purpose categorized as 'Other'.

Despite being labeled as low hazard potential with fair condition assessment, Jacobs poses a very high risk according to the risk assessment, signaling the need for proper risk management measures. The dam has been regulated, permitted, inspected, and enforced by the Idaho Department of Water Resources, ensuring compliance with state regulations. The surrounding area has a drainage area of 12 square miles and a maximum discharge of 333 cubic feet per second, making it vital for water resource and climate enthusiasts to monitor its condition and potential impact on the local ecosystem.