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Show 104 Jones , topographer with the second Powell ( expedition expeffition ) ( Compl . Exhibit 628 ) , notes 14 rapids all in the canyon section above Browns Park , at four of which the boats were either lined or portaged . . Their downstream progress was 81 2 ' miles a day . . Lodore Canyon . ( -Powell's Powells ) first expedition ( CompL . Exhibit 51 ) records a downstream progress of 2 112miles a day with many rapids run , lined , or portaged , and boats capsized many times . Jones , topographer ( ( Powell's Powells ) second expedition ) , reports ( downstream downstrea ) progress of 2 ( % 11 ) miles a day with 16 rapids , of which only 4 were run and the remainder either lined or portaged . ( Summary Compl . Exhibit 628 ; ( Photo- Photo ) graphs 262 to 265 , Compl . Exhibit ( 11-B 11B ) . ) Whirlpool Canyon , Island Park , Split Mountain Canyon , Uintah Valley . ( -Jones Jones ) , topographer Powell second expedition ) , reports 19 rapids in this stretch , all in the canyon section , at 8 of which the boats were lined . Their average downstream progress was 8y4miles a day in the canyon section and 261 / 2 miles a day in the valley section ( summary , Compl . Exhibit 628 ) . Powell on the first expedition reports many rapids in the canyon section at which boats were lined ( Compl . Exhibit 51 ; Photograph 272 , Compl . ( Ex- Ex ) hibit 11B ) . Desolation Canyon , Gray Canyon . ( -Jones Jones ) notes 118 rapids in Desolation and Gray Canyons at which it was necessary to line the boats 32 times . Their ( aver- aver ) age downstream progress was 7y2miles a day . Powell notes many rapids and many times the boats were either lined or portaged . ( Summary Compl . ( Ex- Ex ) |