Casey Creek (Illinois) and Atchison Creek. Gun Creek, which enters Rend Lake on the east side, might also be considered a Casey Creek tributary. Casey Creek (Illinois) Casey Creek is a major tributary of the Big Muddy River in Illinois, United States. It is about long, measured from the junction of its arm of Rend Lake with the arm formed by the Big Muddy River. Casey Creek is shown on federal maps as Casey Fork, following a 1967 decision by the U.S. Board on Geographic Names. It is named for Zadok Casey, a congressman from Illinois in the early 19th century. Casey Creek
Muddy Run (West Branch Susquehanna River tributary) Muddy Run (West Branch Susquehanna River tributary) Muddy Run is a tributary of the West Branch Susquehanna River in Northumberland County, Pennsylvania, in the United States. It is in length. The creek is several miles northeast of the community of Milton. Main land uses include agricultural land and forest. The area of the creek's watershed is 11.4 square miles, most of which is agricultural land. Muddy Run is entirely within Turbot Township. Most of the rock in the watershed is shale. The most common soil series is the Berks-Weikert-Bedington series. Muddy Run begins in a valley in eastern Turbot Township,