In May 1999, construction on a new driveway for the Ada Bible Church, located in Cascade Township, Michigan, revealed skeletal element belonging to an American mastodon, Mammut americanum. During the summer of 1999 a Calvin College team and community volunteers conducted an excavation and recovered all skeletal remain in the vicinity of the original finds. The geographic setting is a swale in an upland region supporting a pond in historic times. The mastodon remains lie directly on glacial till and are covered with a shallow organic-rich clay horizon resulting from pond deposition. The individual mastodon was a male in its later 30's at time of death. Approximately 50% of the skeleton was present; primarily from the trunk or skull regions. Portions of two feet; the left tibia +fibula; and the right patella were the only leg elements recovered. Most of the skeletal remains were badly fractured in situ and will require extensive repair and treatment. Bone material has been submitted for radiocarbon dating. A portion of the site will be covered this winter by the new roadbed, but excavation at the margins will be resumed during the summer of 2000.