Fellows Lake is an 860-acre source of water for the city of Springfield, Missouri. The lake was created by the impoundment of the Little Sac River behind the Fellows Lake Dam. The dam was originally constructed in 1955 and modified in 1991. The earthen and rock dam stands 102 feet high. It is 1,500 feet long at its crest and impounds a maximum capacity of 36,…Fellows Lake is an 860-acre source of water for the city of Springfield, Missouri. The lake was created by the impoundment of the Little Sac River behind the Fellows Lake Dam. The dam was originally constructed in 1955 and modified in 1991. The earthen and rock dam stands 102 feet high. It is 1,500 feet long at its crest and impounds a maximum capacity of 36,368 acre-feet. Fellows Lake is managed cooperatively by City Utilities of Springfield and the Missouri Department of Conservation.