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Show ( port poft ) of Lt . Ives . ( ( Compl Coinpl ) 24 . Exhibit 72 , ( 36th 36t1i ) Cong . , - 1st Sess . , House Exec . Doc . 90 . ) At page 21 he states : The establishment of new military posts . in New Mexico and Utah made it also ( desir desir- desir ) ¬ able to ascertain how far the river was ( navi-- navi ) gable , and whether it might not prove an avenue for the economical transportation of supplies to the newly occupied stations . Also on the same page ( he be ) states : To ascertain how far the river was ( naviga naviga-- naviga ) ble for steamboats being the point of primary importance , it was necessary first to ( make make- make ) provision for this portion of the work . Lt . ( Ives' Ives ) expedition reached the foot of Black ( Canyon Canvon ) on March 12th , 1858 . At this point the , water became very shoal and numerous rapids were . encountered . He makes this observation in fixing the ( head bead ) ( of" of ) navigation : It appears , therefore , that the foot of Black Canyon 356 miles below Lees Ferry ( should shomId ) ( be be- be ) considered the practical head of navigation , and I concluded to have a reconnaissance made to ( connect 'Connect Connect ) that point with the Mormon road and let this finish the exploration of ( the the- the ) navigable portion of the Colorado . Expedition of Lieutenant George M . Wheeler , 1871 Lieutenant Wheeler , United States Topographical Engineer , conducted an expedition up the Colorado River in 1871 . He reports on the head of ( improved improved' improved ) navigation as follows : |
