St. Louis Post-Dispatch (Jan. 3) -- Edwardsville, Ill.-based Contegra Construction Co. recently completed a $6 million expansion project at the National Great Rivers Research and Education Center on the Mississippi River at East Alton, Ill. Begun by the U. of I. and Lewis and Clark Community College, the center is staffed by researchers studying major rivers, their watersheds and the communities that depend upon and affect them.