I had an old book on the construction of the thing once, but have no idea where its at now. I believe it was built during the 20's or 30's, and it was to relieve flooding on the Marias Des Cygnes river. They dug it with huge draglines. It starts somewhere over in eastern Kansas, and essentially, they just dug straight through all the turns and twists on the River, to provide a straight shot for the water to go and relieve the flooding of all the good crop ground. It's confluence with the Marmaton is just upriver from the New River Bridge on highway M NW of Schell City and SE of Rich Hill. I have mainly bank fished it, but have ran lines on it a couple of times. Since it was dug, there are some really weird fossils and things to be found on it. I dont know how wide it was originally, but its a wide sucker now. Deep in spots too.