Show two from tooele thoele view army s operation Op ration tuesday operation underground the ser es of army explosion tests to de termine the strength of various un underground der ground f artif icat ficat ons began on tuesday july 27 at dugway proving grounds when charges of TNT were set off at two different locations witnessing these explosions were a selected group of newspapermen radio broadcasters news reel camera men and army vers who braved the and de gree temperature to see the first in an eight months series of elpio from which the army hopes to gain knowledge of the krotec tive capacities of various tures oren probert executive secre tary of the chamber of commerce and wesley D bush of the CHRON ICLE were the only two tooele thoele ob servers and report an interesting time at the th proving grounds which is located 55 miles southeast of tooele thoele tests will be invaluable the main objective of these tests is to supplement knowledge gain ed in world war wai II 11 about under ground structures and their resist ability to on and shock waves not much is known about the latter but they are waves that move through rock and earth after an on their effect on these fortifications will be studied and the tests will prove invaluable to the future of this country the targets are made of rein forced concrete and set under ground at varying distances from the center of each planned det conation TNT charges of ibs lbs to pounds will be set off to test their damage on these tures and the instruments set in them to gauge the shock con arary to some beliefs no A bombs or of that nature will be used however at it s greatest blast the power of the largest TNT NT charge will be approximately one fifth that of an atomic bomb ideal location targets will be set in various types of soil under natural condi eions at dugway clay and sand and are in abundance and experiments will be conducted on these types of earth at buckhorn washington county near castle dale utah sandstone is greatly in evidence and at canyon near grand junction colorado granite is plentiful thus the biggest part of these tests will be made in these three localities technical experts from theu the U S engineers and the colorado school of mines have been obtained to aid with these experiments mor rison knudsen company was grant ed the biggest contract for work at dugway the construction job while other companies such as the research associates of minnesota are also working there P further tests set major philip H a new ar rival at the area off ce of the corps of engineers in salt lake has tak en charge of security and c safety he was in charge of the large group of observers at the tests tuesday and is the man with whom the press will deal directly in the future As further tests are made an noun lioun cements of their results will be made if the information is able to be divulged newsmen and photographers will be notified in plenty of time in case more cover ipe ive is desired as the explosions progress |