Weekly journal-miner., 1917-09-12


 electrical power to two auxiliary tanks back of the boiler house, which con tain "A hours supply of oil or to a large storage tank located about l,OO0 feet from the boiler house. This storage tank contains 30 carloads of oil, enough for one months opera tions.
 The water for the boilers is obtain ed from a well in the basement and before being placed in the boilers the water is thoroughly purified of all foreign matter in a carefully designed laboratory located m one corner of the boiler room. From this labora- tory the water is pumped to feed water heater and from the feed water heater is forced by duplicate sets of pumps through the economizers and thence into the boilers themselves. The oil feed pumps, which are in duplicate. are located immediately in front of the water pumps and supply oil directly to the burners under the boilers. The regulation of the oil feed to the boilers is entirely automatic and the amount of oil and steam for vaporizing same is automatically regulated by the demands upon the boilers themselves. The four boilers are connected by pipe bends to steam header on the south side of the boiler room, and from this header steam at 250 pounds pressure and l5O degrees superheat passes directly to the steam turbine, which operates the 10000 horse power electric generator. After passing through the turbine the steam enters a condenser which is To-
 cated in the basement of the building directly under the turbine itself. This condenser has l4 miles of onc-inch copper tubes, through which cold water is continually flowing. In pass ling through the condenser the steam is returned to the water circulating system.
 | The steam turbine and electrical generator which was furnished by the General Electric Company is capable of producing 10000 horse power cleo trical energy and efficiency is equip ped with water cooled bearings. pumps for circulating oil through the bearings, and with a specially con structed air cooling device which forces cool air through the windings of the generator and thence into the | open air. The water circulating sys- tenn for cooling bearings is operated | from a large tank on the roof of the engine house whence it flows by gray 1 ity through the bearings of the tur- bine and generator and thence through cooling coils immersed in the conduit which carries the condensing water to the condenser. From this point it passes to large storage tank in the basement from which it is pumped to the tank on the roof by electrically operated centrifugal pumps. In order to supply suitable water for the condenser itself with absolutely no diminution in the water supply of the river, concrete intake was built on the bank of the Verde river, 4,600 feet from the power ' house, and the water from this intake is carried by means of a concrete Hume four feet wide and three feet | deep to the inlet of the condenser i After passing through the condenser, ! continuation of the concrete Hume 800 feet long returns the water di- rectly into the river. Two thousand ! five hundred feet of this concrete | Hume is covered with a concrete slab ! roof, the remainder being open to the air, the roof being necessary to keep ! the Hume from filling up in case of high water in the river itself
 Electricity generated by the turbine is delivered directly to the bank of four 1000 K. w. transformers, one ol 1 these transformers being spare in case of accidents, and IS raised from voltage of 2,300 volts to 45,0O0 |, transmitted through oil switches di- rcctly to the Clarkdale sub-station of The Arizona Power Company.
 Immediately cast of the power house seven houses for engineers and operators have been built under the shade of cottonwood trees. and along side the open concrete Hume. The space in between the houses, 400 feet long and loo feet wide, has been planted with fruit trees and an oval gravel driveway passes around the plaza immediately in front of each house
 By means Of this steam plant The n (- tf i l