Sunrise River Pool 1, also known as South Pool, is a state-regulated dam located in Chisago County, Minnesota. Owned by the state and designed by MNDNR-BOE, this gravity dam serves a primary purpose that is classified as "Other," with a normal storage capacity of 300 acre-feet and a maximum storage of 400 acre-feet. Completed in 1964, the dam stands at a height of 12 feet and has a structural height of 15 feet, with a length of 650 feet and a drainage area of 160 acres. The dam's spillway type is controlled, with a maximum discharge capacity of 3,685 cubic feet per second.

Despite its low hazard potential and fair condition assessment as of 2014, Sunrise River Pool 1 presents a very high risk, as classified by the US Army Corps of Engineers. With a risk management plan and emergency action plan status unclear, the dam poses potential safety concerns that may need to be addressed in the future. The dam's location alongside the Sunrise River in KOST, Minnesota, highlights its importance in managing water resources and mitigating the impacts of climate change in the region. As a key structure in the area, ongoing monitoring and maintenance of Sunrise River Pool 1 are essential for ensuring its continued functionality and safety for the surrounding community.