Engineering Wonders of the World
Volume I

102 ENGINEERING WONDERS OF THE WORLD, tion Service up to January 1, 1908, shows that it has dug 3,458 miles of canals. Some of these canals carry whole rivers, like the Truckee River in Nevada, the North A Summary. , ,, Platte m Wyoming, and the Belle Fourche in South Dakota. The tunnels excavated are fifty-eight in number, and have an aggregate length of 84,630 feet. More than three hundred large structures, including the great dams in Nevada, Idaho, Wyoming, Washington, and Arizona have been erected. It has built 338 miles of wagon roads in the mountainous country and in heretofore in- accessible regions. It has established and has in operation 983 miles of telephone. Its own cement mill has manufactured 150,000 barrels of cement, and its sawmills have cut more than 3,000,000 feet B.M. of lumber. There have been excavated 54,890,000 cubic yards of earth and rock. The total expendi- tures of the Service at the close of the fiscal year, June 30, 1908, were nearly $42,000,000. The acreage actually supplied with water by the irrigation works constructed approximated 1,000,000. It is estimated that as a result of the activities of the Government, more than 10,000 families have already taken up their homes in the desert. IRRIGATION BY PUMPING, WILLISTON PROJECT, NORTH DAKOTA.