The program of engineering exploration and the quantitative study of ground water storage and recharge to assure Canton, Ohio, of a permanent ground water supply of predetermined magnitude are summarized herein.Two completely separate aquifers, one underlying the other, were found in the area. A pumping test was made in each formation and the results were used as a basis for determining the number and type of horizontal collectors needed to develop 10 mgd of firm water. This necessitated the design and construction of dual-purpose collectors to infiltrate up to 18 million gallons per day from a small, nearby stream at all times. Because it is a pioneer installation, the Ohio Water Resources Board, the City of Canton, and the U. S. Geological Survey are making a careful study of the collector field as it continues to operate. Preliminary data indicate that the system was conservatively designed and will probably yield more water than was originally expected.