OCR Text |
Show 95 The ordinary mean flow at Lees Varry around , . 102000 . . The average flow is 20,000 . That curve just represents the usual conditions , and gives the picture throughout the year . . . ; | The usual conditions throughout the year ( afce- afce ) shown on Plates 7 and 8 . The maximum velocity shown at Lees Ferry rail from say 3 miles an hour for thirteen days , , up to ( over-it overit ) runs off the sheet at 7 % , miles an hour for 80 days . In other words , conditions as shown on . here probably only obtained for forty days ( during during- during ) the year . . To be exact , the flow is over 60,000 ( second-feet secondfeet ) , , or , over the flow upon which those velocities were ( ob- ob ) . taiiied , , for 31 days in the year ; for 31 ( days d4ys ) in the year , , on the average , the velocity was higher ( than- than ) the velocities indicated on that plate . Passing now to Plate 9 , which is another attempt to show the characteristics of the river as shown ( by- by ) the gaging stations , these are plates which indicate the mean depth of the river at the gaging stations . . Taking a depth of five feet as an example , which is at Lees Ferry , a depth of five feet or greater ( is- is ) expected for 280 days . At Green River , Wyoming , a mean depth of five feet for 140 days . . At ( Green- Green ) river , , Utah , a depth of five feet for over 120 days . . For the Colorado River at Cisco , a ( "depth depth ) of over five feet for 110 days . . For the San Juan River at Bluff , , a mean depth of over five feet for 80 days . . |