Show Will IVILL OPEN BOUlDEn DAM Secret Secretary ry and Congressmen men Arrive in Las Vegas for Ceremonies n Br By United Pre i LAS VEGAS Nev July 3 3 Ray Ray Lyman Wilbur secretary of the interior in tenor and a a. group of congressmen and other government officials arrived arrived ar ar- ar- ar rived here today to officially start excavation work on four diversion tunnels fennels at Boulder canyon dam with Secretary Wilbur Wllbur were El- El wood Mead commissioner of reclamation reclamation mation matlon R R. F. F Walter chief engineer engineer engi engi- engi- engi neer acer Carl Gray president of the Union Pacific o railroad and 60 others Secretary Wilbur Wllbur came came- here to press press' pressa a button which will explode the first charge rge of ot powder and start work on the tunnels each 50 feet In diameter diameter eter through which the Colorado river will be diverted while the dam darn dams darnIs Is s being built |