U.S. Army Corps of Engineers
http://www.usace.army.mil/
http://www.lrd.usace.army.mil/
Center of Expertise for Inland Navigation
http://inlandwaterways.lrh.usace.army.mil/
Mississippi Valley Division (MVD)
http://www.mvd.usace.army.mil/
The Restructured Upper Mississippi River— Illinois Waterway Navigation Feasibility Study
http://www2.mvr.usace.army.mil/umr-iwwsns/
Institute for Water Resources (IWR)
http://www.iwr.usace.army.mil/
Navigation Data Center
http://www.iwr.usace.army.mil/ndc/
Ohio River Mainstem Study
http://inlandwaterways.lrh.usace.army.mil/Articles/index.cfm?id=96
Great Lakes St. Lawrence Seaway Study
http://www.glsls-study.com/waterway.html