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Show Even before a shovel of dirt had been turned, the St. Louis Jefferson Expansion Memorial Arch had achieved world-wide recognition as one of the toughest engineering challenges in man's memory. Of gigantic proportions . . . 630 feet high, and 630 feet across at the base ... its exterior skin of 900 tons of j stainless steel must meet "jewelers" specifications for j smooth, polished finish. It represents the kind of engi- neering . fabricating - erect- ing achievement Pittsburgh- ' Des Moines customers have j been accustomed to over the ' past seventy years. Startling- ly simple in its boldness, the ! inverted catenary curve is without precedent, either in its Eero Saarinen design, or in its fabrication and construction con-struction by P.D.M. COMPLICATED SIMPLICITY t -i.v Jv - - : I i . ' . : Things Have Changed In St. Louis What-must rank as one of the most course, actual fabrication and difficult structural engineering erection of the structure. Still feats of all time reached its climax ahef,d were some five months of . -.r- insr i nrki final finishing including recovery cn October 25, 1965, when PDM , 3 , . , s, .... . 7 ' of the creeper derricks, stabilizing put the final prefabricated seg- sfrutS; exterjor rai,s Qnd c,eQnjng ment of the Jefferson National Ex- anci polishing operations. On com- pansion Memorial Arch in place. pletion, the arch will take its place Ended were literally hundreds of among the world's most awe-inspir- man-years of work in design, cal- ing and beautiful monuments. culation, development of radical PDM is extremely proud of its techniques and equipment plus, of contribution. PiTTSBURGH-DES MOINES rCh STEEL COMPANY IfPd I PLANTS AND OFFICES JN 22 CITIES 500 East 600 South, Provo, Utah xf f If . y- How Mountain Fuel tells I America about Utah- I Uuh nd loulhweslern Wyoming, located in the heart of the growing j West, offer many advantage! for your new plant! Access to market! Broad tax base j Available raw materials Desirable place for living , Superior labor force . Quality educational facilities j Choice transportation Cultural atmosphere I j Favorable climate Social and recreational opportunit.es . Good water supply Economical power I and abundant supplies of natural gas at industrial rates 21 below the national average; commercial and residential rates 34 E j below the national average! Mountain Fuel owns and operates its own transmission system Gas reserves I If owned Z Controlled by contract almost always approximate a 20-year supply )'' based on current consumption. . Send for our brochur. M MOUNTAIN FUEL "A Look at Natural Gas Service fcM kpplycompant S Available for Industry I Vw Sum in Mountain Fuel Country." iS0i.ai,M,-r..nK-uMa.X'kMM 0 II This advertisement appears this Fall in the New York Times Wall Street H Journal and many other national publications. It is designed to encourage f. industrial expansion in Mountain Fuel Country. It is another way in which we are privileged to serve you. l! A MOUNTAIN FUEL j firfih SUPPtT COMPANY j Jjtj 1 jwL t. Gal $ew6x M |