Pagel-Madden, also known as Lake Marion, is a privately owned dam located in Lyon, Minnesota, near the city of Lamberton. Built in 1978 by the USDA NRCS, this earth dam stands 40 feet tall and spans 470 feet in length, serving primarily as a water supply source. The dam has a storage capacity of 141 acre-feet and is regulated by the Minnesota Department of Natural Resources.

Despite being classified as having a low hazard potential, Pagel-Madden underwent its last inspection in March 2016 and was found to be in satisfactory condition. The dam features uncontrolled spillways and outlet gates, with a maximum discharge capacity of 225 cubic feet per second. The risk assessment for the dam is moderate, indicating a potential for moderate consequences in the event of failure.

Pagel-Madden's association with the Meadow Creek-TR stream system and its role in water supply management make it a key structure in the region. With a history of sound maintenance and regulatory oversight, this dam continues to play a vital role in ensuring water resource sustainability in the area.