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<br />.1 <br />I <br />I <br />I <br />I <br /> <br />Alternative Pipe Types <br />. - - TYPlCAt.;. TRENCH -REQUIREMENTS- <br /> <br />i-- <br />I <br /> <br /> <br /> . . . . <br />. . . . <br />. ~! e . <br />~ . . . . .. <br />.. ~2 . i <br />. i .. <br />.. -no <br /> ..,.... <br />-II') ~~ <br /> <br /> <br /> <br />'n <br /> <br /> <br /> <br />-. <br /> <br />,'- .. <br /> <br />I' ~ . <br /> <br />1'- " <br /> <br />" <br /> <br />Ductile Iron <br /> <br />Pretensioned Cylinder Concrete <br /> <br />PVC or Permastran <br /> <br />Proce~~ed Backfill <br /> <br />~ <br /> <br />-................. <br />n_.. .....___,. <br />......,""u...n"'_...... <br />-....-.-........ <br />...... ......,.,... <br />:::f:j~[m::~I[t[:[[iJ;:: <br />- <br /> <br />COLORADO WATER CONSERVATION BOARD <br />. TOWAOC MUNICIPAL PROJECT <br /> <br />Note: Trench dimen~ion~ ~hall be the ~ame <br />for 12-inch and 14-lnch diameter pipe. <br /> <br />Rockfree Backfill <br /> <br />TYPICAL PIPE' SECTIONS <br /> <br />Common Backfill <br /> <br />MORRISON-KNUDSEN ENGINEERS, INC. <br />PA.TE OCT. 1&&7 fIGURE 3.9 <br />