Today a privately-funded plan for the river is coming out. They include the idea of having a 10-mile lake with islands and buildings IN THE MIDDLE OF THE RIVER.
Is this engineeringly possible?
This is the one that Kaiser, Warren, and others are putting their money into.
(http://www.tulsaworld.com/images/2006/060831_A1_Avisi33313_a1river31.jpg)