| Show I Ban Requested on Ships Flying Low LowIn LowIn LowIn In Black Canyon S WASHINGTON July 22 If-A If new form of outdoor sport will wUI b bo be ended shortly shorty if the bureau of or reclamation matlon mation gets its way Pilots have been flying sightseers sIghtseer through Black canyon near Hoover Hoo dam site on the Colorado river Th The canyon Is about 1200 feet deep anc and I air regulations allow airplanes to fly within feet of ot tho the ground surface sur sur- lace face except over over towns There is 15 a I cable bridge about half way up anc and I blasting operations operations' are arc going on con con- Construction engineers fear danger danger danger dan dan- ger would befall betaU a plane in the narrow narrow nar nar- row canyon during blasting and they dislike having workmen high on the thc rock walls startled by the planes The commerce department has been beer I asked to amend the rules to compel planes to fly Iy about feet above the top lop of Instead of ot the bottom of the S canyon |