OCR Text |
Show ( from -from from ) Lake Superior , including 329 the west ( and end ) of Lake ( Erie Eric ) ; was on duty for over three years on the Washington filtration plant . ( R . 1217-1218 . ) From about August 25th to about September ( 4th 4tb ) , 19291 ( he lie ) made an official examination of the ( Colo- Colo ) ( rado xado ) River . ( R . 1218 . ) With reference to crossing bars . A river is ( or- or ) , ( dinarily diiiarily ) a succession of bends , with more or less straight reaches at the point where the curvature changes . During a freshet a river ordinarily builds a bar at the point where this curvature , changes . ( R . 1219 . ) In the reach where the change of curvature ( oc- oc ) curs , there will ordinarily be built during a freshet a sand bar . He is speaking now exclusively of rivers carrying a heavy load of sand in their bed . Gravel is a very different proposition , and rivers that carry no sand , or very little sand , do not ( be- be ) ( have -have have ) in this ( manner maliner ) . ( R . 1219-1220 . ) This crossing bar may at the end of the freshet be considerably above the ( low-water lowwater ) surface of the water . As the freshet plays out and the river begins to fall , a ( time tinie ) ( comes colnes ) when the river ceases to build the bar higher , and on the contrary , begins to excavate a trench through that bar , which . will ( eventually -eventually eventually ) become the low water channel . The amount of excavation may be very ( consider consider- consider ) able . He saw bars along the Colorado River where it is quite certain that the excavation reached four or five feet . In the case of the Arkansas River , he has come in contact with cases where it probably , |