Show J SILL B BOULDER lDER D DAIS M L. L r PIT til nON i UI iIII U Las Vegas Age Jc We have begun Tactual actual t t work ork on n the Boulder t dam clam project In ee with the order received from th the department said Walker R R. In charge of construe construe- lion tion bf the great enterprise yesterday The statement was made suede to Mayor 3 J. Fred Hesse representatives of the Age and a small email group of citizens of ofLas Las La Vegas as Mr Young explained the nature of the important work which Brock ds Weymouth engineers of were undertaking with the aid of a Fairchild Fan Wasp-motored Wasp monoplane manned by Ralph K IC Smith pilot T. T J. J Connolly mechanic and Tom Moore cameraman The first work of construction It was explained consists In making a complete complete complete com com- topographic survey of the area Inthe in inthe inthe the vicinity of Boulder Dam site to cover the construction camp site the townsite proper the construction railway railway rail raU- way and a portion of the reservoir site The surveys ys are for securing data fo for forthe the engineers by which to study am and plan the project Already very detailed information as to the dam site ant and appurtenant structures has been secured secured ed by ground surveys but the aerial aeria surveys will facilitate the location o othe of the Incidental features of the project laying before th the the engineers at ai a glance the topography of the entire area The advance In aerial surveying Is not generally understood or appreciated ed by the public In addition to the aerial mosaic of the whole region th the engineers produce aerial topographic maps In a larger scale of 01 the particular areas desired On these particular areas the aerial survey urvey will show th the contour lines Unes with the altitude of ever every peak with an accuracy no not generally attained by the usua usual methods of making topographic sur sur- veys eys The department has adopted this method of topographic surveys because it is quicker and cheaper than the ol old method of ground surveys In a few hours the aerial surveyors will ill secure data which by the old method would require the work of several parties o of sun surveyors for several months It was explained that the construction construction construe tion e engineer having these aerial topographic topographic top top- maps before him can quickly select the best location for the D Boulder Boulde ulder Dam city the definite location an anthe and the cheapest and best route for th the construction railroad and the highway without awaiting the more tedious work of surveying parties on th the ground So while still In its engineering stages the aerial topographic surveys now under way constitute a definite beginning of actual work on the proJect project project pro pro- for which congress has just provided pro pro- vided the sum of as the first Installment |