The dam is located on the Missouri River approximately twenty miles from the town of Glasgow, Montana. It will be constructed of earth by the hydraulic process. The total length of the dam will be approximately 20,000 feet with the principal portion approximately 9,000 feet in length, and a maximum height of 230 feet above the bed of the river; the smaller portion being about 11,000 feet in length on the left bank. This latter portion is more in the nature of a dike and will vary in height from zero to sixty feet; it is planned to build this portion by the roll-fill method rather than hydraulically. The entire dam will require about 90,000,000 cubic yards of earth. For the upstream and downstream toes and facing on the upstream slope, a total of 5,000,000 tons of gravel and 3,000,000 tons of rock will be used. A steel sheet piling cut-off wall or diaphragm will be driven to firm shale along the center line of the dam. A roadway will be constructed on top of the dam. The reservoir created will have a maximum depth of 230 feet and an area of approximately 250,000 acres; a maximum length of 175 miles; and approximately 2500 miles of shore line. The maximum capacity of the reservoir will be approximately 20,000,000 acre feet. The required time to fill the reservoir after completion is problematical since it depends upon the flow of the river, but based on discharge records over the past 40 years, four years will be necessary.