lasting benefit to the Red Men of the Southwest, many of whom have continued on similar work for railroads and other corporations. The Roosevelt Road, now familiarly known as the Apache trail, is one of the most spectacular highways in the country, and thousands of tourists go over it each year in automobiles. The site for the dam was located at the entrance of the profound canyon that Salt River has cut through the mountains. Just above the canyon, Salt River and Tonto Creek converge in a broad, level valley, which is now submerged to a depth of nearly 200 feet, forming one of the largest artificial lakes in the country. The Roosevelt Dam is of sandstone hewn from the walls of the canyon in which it is built. It is of gravity section, arched up stream, 280 feet high, 168 feet thick at base, and 1,080 feet long on top. At its base it covers an acre of ground. A building 209 feet square and 26 stories high would about cover the space of the dam except that halfway up the sides there would be space for two more structures, each 11 stories high and 885 feet long on top. Owing to the long haul for the railroad the activities of the engineers were varied and numerous. The Government cement mill turned out 600,000 barrels of first-class cement, the saw-mill in the National Forest manufactured all the lumber required to house 2,000 people, and for stores, offices, etc.; a hydro-electric plant furnished power to the contractor on the dam and light for the camp; two farms were operated to supply food for the employés; water works and sewerage systems were installed, and law and order were preserved during four years of construction. The engineer had charge also of a large commissary, a big mess, and superintended a brickyard and cement pipe plant.