Chatfield Twp 27 is a privately owned dam located in Fillmore County, Minnesota, specifically in the city of Lanesboro. The dam's primary purpose is flood risk reduction along the Rice Creek-TR river or stream. It is regulated by the Minnesota Department of Natural Resources and undergoes regular inspections, enforcement, and permitting to ensure its safety and effectiveness in mitigating flood risks in the area.

Constructed with a rockfill design and a height of 28 feet, Chatfield Twp 27 has a storage capacity of 17 acre-feet and serves a drainage area of 0.3 square miles. Despite its low hazard potential, the dam's condition assessment is currently not rated, and it has not been modified in recent years. Its last inspection was conducted in May 2018, with a scheduled inspection frequency of 8 years. Overall, Chatfield Twp 27 plays a crucial role in managing flood risks in the region and is an important asset for water resource and climate enthusiasts to monitor and study.