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i; /� <br /> �;;: .,, � � <br /> �. <br /> �.��v �c �,��L� <br /> �� �� � <br /> �,,�; ..�p - �7 <br /> ISOGINC IiNGINEERING AND CONS'I'RUt:'1'ION <br /> ISu1lding, 40-55 <br /> ISiofilCrntlon Swale <br /> Additional VeEetation <br /> On sheet C 508 the nddicinnal vegetntion required for the swnle, shows 25 � <br /> clumps per 100 llneal Pret of each plant. 1'hts should read, 1 pinnt per <br /> square foot of. bottom of swale. � <br /> Level�Spreaders <br /> The p" n calls Eor railrond ties for the level spcenders. These nre not <br /> ncceptnbl� for use in a swalc due to thc creosotc oil in the timbers. An <br /> alternate sia.e CimUcr will be required, using n non-creosote proservacive. <br /> �,1 <br /> Cnrroll E. Tolletson <br /> Public Works Inspectoc <br /> CF.t:<g(e1m917.fl <br />