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30 1- .~ \\Q\.~a '" At the~~ sections where rock is available it is used for channel prote~tion, instead of gravel. During 1939, 13313 cubic yards of gravel and 139 cubic yards of rock was hauled and placed on inside slopes of canal banks, this protected 7.94 miles of bank. This work should be continued until both inside slopes and the base of the canal is stablized. . The C. C. C. forces are also graveling inside slopes of both the Low Line and the Rc~ervoi~ Su--,ly canals, during the past season 852 cubio yards of gravel was placed on the banks of the Low Line Canal and 1828 cubic yards on the Reservoir Supply canal, Rock is also hauled during the ,vinter months and placed in storage piles for emergencies repairs during the irrig~tion season. The check at mile 36.6 was repaired and the checks at miles 70.3 and 73.1 will need to be rebuilt before the next irrig~tion season, New weirs were constructed below the turn outs at Mile 18.1 and 15.8. Two Gravel traps were constructed for loading Gravel into the trucks. The damaging willows and cotton wood trees are being renoved fron the main canal banks, this does not include the English grey willow~hich is being encour~~ed to GTOW. " On June 1st a sink hole occurred onbe Hi~h Line Canal near nile 124,4, both banks and the canal botton sloughed in for a distance of about 100 feet. The banks were plowed in and the botton puddled and no further trouble has been experienced. A snall sink hole also developed in the Low Line Canal near Mile 27.3, this was repaired with very little trouble. A storn on June 1st washed about 1000 cubic yards of silt into the Low Line Canal in Section 26, T. 22, N" R. 52 W., this was ren~ved by dragline. At that point a bridee over the Low Line Canal has been nade to act as a flume to pass sone of the storm w~ters and silt over the canal. " Operating roads on top of the banks of the HiCh Line and Low Line canals are being widened and Graveled and auto g~tes installed, the work is being done by C, C, C. forces. The noss conditi~n is beconinc a menane to the project, There bes been some m0SS in the system under the Low Line Canal for several years, but n~w noss is beginning to appear in canals and laterals allover the projec.t, During the past yea, moss was removed from four niles of the High Line Canal, 32 nilcs of the Low Line and fourteen niles of laterals, The c.hca;:>est and r:lost effective nethod of' removin,;.=-s-.q j..s to drag a. heavy "baill 1l.jJ a.J1.d down throueh t.he c=l ~t.ion. 3