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That drainage job : a few suggestions for foreman to make drainage easier and better.
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1943
[PDF-10.26 MB]
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Description:The letters "MCWA" stand for "Malaria Control in War Areas". It is a very important part of the war effort. Because it is important and because every bit of it is being paid for from Public Funds, those of us who are doing the work must do the best job we can and do it at the lowest cost. Every time we waste money by making a careless mistake or by digging a ditch that won't do the job it was built to do someone has to buy extra war bonds or pay extra taxes. Do a good job, a job that will work and a job that will cost just as little as possible. There are many ways to drain water off a pond or swamp. Some you may have used before, others you may not have thought of. In the next few pages a few suggestions are made and a few common mistakes are pointed out. Look these over. They may aid YOU to do a better job for our country at lower cost. Study the suggestions and see if they will fit your problem.
Ditches should be as straight as possible -- Curves should be gradual or else protected -- Don't dig lateral ditches until the main ditch has a chance to drain off the ground water -- A ditch should be just large enough to carry off the surface water rapidly -- The sides of ditches should be sloped -- When ditches join -- Channel clearing -- Depth of ditches -- Natural filling methods -- Silt in ditches -- Underground drainage.
Federal Security Agency, U.S. Public Health Service, Office of Malaria Control in War Areas, Atlanta, Georgia.
16 unnumbered pages
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