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<br />00245 <br /> <br /> <br />comlructed IQ provide regulatory storage. <br />With World War II cunailing construclion of needed Woller facililies. the acceleralpd dctivityofthe 1950sbegan <br />wllh comlruClion of Gros.. Reservoir on Soulh Boulder Creek. Compleled in 1955, GrO'>s improved water ..wrage <br />for the new supply divencd through the Moffat Tunnel and helped Denver survive the drought of the mid-5(r." <br />The Blue River Diversion project, first studied before World War I and surveyed in the early 1921h, would bring <br />Woller mote than 80 miles to Denver from the Blue River and its lributaries on the Weslern Slope. <br />Woller Department crews tackled the immense project in 1946 by sldningconstruction at Grant,Colo.,of a 23.3- <br />mIll' tunnel under the Conlinenl.1I Divide. In 1956, six large construction firms combined to successfully bid the <br />tunnel projecl. Working from four headings, they completed and concrete-lined in 1%2 Roberts Tunnel, at the <br />time The lon~est underground water tunnel in the world. <br />PlOTting and maintaining the proper alignmenl of the boreasdeepas 5.000 feel through a 13.ooo-loot mountain <br />r.ltlge pre~enl('d engineering problems. Construction conslantly was threatened by huge areas of unstable rock <br />.md ~ublerr,jnean water pressing to block and flood thE' project. <br /> <br />West Side Yards {pres4 <br /> <br />