Show Barrier System Controls I I Debris in in Flood Streams I To prevent quant quantities Ue of sand gravel and heavy debris from being being being be be- ing washed into irrigation canals by mountain mountain streams at flood periods periods per- per cods a system of stream control by barriers consisting of embankments embankments embank embank- I ments a spillway and a control basin has been devised by the Bureau of Agricultural Engineer- Engineer in U. U S S. S Department of ture Barriers have been installed I in several western streams I IThe The barrier is constructed at a favorable location in the stream so so as to spread ad the water and cause the ma material ial al to-be to deposited in the basin As th th basin becomes filled the th stream is so so directed that the burden it drops bu builds the embankments higher The embankments and spillway may maybe may maybe be made of materials at hand hand hand- of timber and nd rock rubble masonry man mas mas masonry onry o or rubble rubble te Control works have been bee Installed Install Install- ed in 18 streams in Utah and re recent recent re- re cent studies indicate th that t the supply supply supply sup sup- ply of irrigation water from tho those streams has been doubled and the expense of cleaning canals and ditches has been reduced materially materi materi- ally |