Allen Branch (Doe Run Creek tributary)
Allen Branch is a stream in St. Francois County, Missouri. It is a tributary of Doe Run Creek. Allen Branch has the name of the original owner of the site. Course. Allen Branch rises about 0.25 miles north of Buck Mountain in St. Francois County, Missouri, and then flows northeast to join Doe Run Creek about 2 miles south of Doe Run. Watershed. Allen Branch drains of area, receives about 44.5 in/year of precipitation, has a wetness index of 435.49, and is about 89% forested.