This feasibility study of a proposed grain elevator focuses on an 11-county area covering parts of the Mississippi Valley located in northwest Illinois, northeast Iowa, and southwest Wisconsin. Projected estimates of production and exportable surpluses of corn, oats, and soybeans are used involving grain movements based on primary and secondary data from country elevators and truckerdealers. Potential yearly grain flows to the proposed million-bushel river terminal are estimated at 9 to 14 million bushels for 1980, yielding variable investment returns. Estimated yields are 5, 10, and 16 percent when annual grain flows through the river terminal are 9, 11, and 14 million bushels, respectively.