Mohave County miner., 1911-03-04
C. o. Shelter Work
 Most Active,

berS about Seventy-ive men and 1t will
 require force equal to this one, or larger, the remainder of the present year to complete the work required ir installation of the reverbatory furnace and McDougaI roaster plant. This ad, dition to the present plant will cover a ground space $50 feet long and lOC feet wide. It will consist of two re. verbatory furnaces 100 feet long and six McDougal roasters.
 The work of excavating for building and machinery foundations, for the bins from which the concentrates will be carried by belting elevator system, for the base of the new stack and for a great tunnel into which will come electric slag cars to serve the reverba- tories has been going on for three months, in connection with the manu- facture of concrete and putting it into foundations, retaining walls, etc.
 The slag tunnel required a cut 30 feet wide, 15 feet deep and 276 feet long. The track from this tunnel connects with the same system of tracks which now serve the blast furnaces with electric slag cars. This slag tunnel is lined with concrete walls four feet thick and in the center is a supporting concrete wall ? feet thick. On the top of this tunnel will rest the boiler battery which will sup ply the required steam for the addi- tion to the shelter plant. There will be four water-tube boilers, each hav- ing a capacity of 400 horse power.
 Some idea as to the size and i'm portance of this work will be had from the size of the stack which will be re- quired to accomodate it. The base for this stack is 50 feet in diameter and an excavation ten feet deep of that dimension, has been made. It will require HOO yards of concrete for this base and this concrete work will start during the next few days. The contract for the brick work on this stack has been awarded to the Kellogg Construction company of New York and this company is expected to be on the Job with a force of bricklayers soon after the middle of next month. This stack will be 300 feet high and will be 2 feet in diameter, inside measure ment, the walls will be of hollow brick, of special make, which will be manufactured at Ancho, N M., a station on the Fl Paso & Southwest ern railway. The stack wall will be 3 and one-half thick at the bottom and one foot thick at the top and 1,25O,OOO bricks, or tiles, will go into this stack, according to estimate.
 The concrete foundations for the six McDougal roasters and for the steel building to accomodate them have been completed and vast amount of machinery and structural steel is al- ready on the ground. The storage bins are of concrete and are about complete. They will be on a level with and on the east side of the roast CTS. The concentrates for which the roasters are being provided will be brought to these bins over an elevated track and from the bins which are 400 feet long will be taken by a converter belt elevator to the roasters.
 This additional plant is connected with the smelter system of railroad, the grade for winch comes from the north on the west side to a point about opposite the new stack, where the grade is 19 feet high. From this point the ore cars will be carried into the works over steel trestles in the same manner as ore cars are now carried to the feed floor of the blast furnaces.
 An addition to the fue dust cham Der has been completed which covered a ground space of 5000 feet. This was built of tiling. Connecting with this new chamber is a new converter iue of immense size, sufficient to carry the gases from the eight converter stands. This converter iue is now connected with four of the converters and will be complete and serving all the con- verters within the next two weeks. This fiue, where it enters the chamber, is l3 feet in diameter and will be II feet in diameter at the small end where it receives the gases from the first converter. This fue was manu-