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<br />,. . <br /> <br />, .I <br /> <br />-~ <br /> <br />-1/.- <br /> <br />-11- <br /> <br />..~- <br /> <br />PLASTIC PIPE TRENCH DETAILS <br /> <br />x <br />a <br />. <br /> <br /> <br /> <br />o <br />t'( <br /> <br />-=. /1-/1- <br />- -- <br />- -- <br />FINAL BACKFILL <br />(e" lIax. .Ize) <br /> <br />/1-/1- <br /> <br />FINAL BACKFILL <br />( 1 It Max. . I ze) <br /> <br />x <br />o <br />E <br /> <br />.. <br />~ <br /> <br />INITIAL IIACKFILL <br />(1" ..ax. .Ize) <br /> <br />.. <br />~ <br /> <br />~ <br /> <br />..." (If <br /> <br />FIGURE' - 4" TO '8" DIA. PIPE <br /> <br />'- <br /> <br /> <br />1-11- <br /> <br />X <br />D <br />. <br /> <br />FINAL BACKFILL <br />(1" Max. .Ize) <br /> <br />x <br />o <br />i <br /> <br />.. <br />'to <br /> <br />.. <br />~ <br /> <br />INITIAL BACKFILL <br />(..Ieot MaterIal) <br /> <br />., <br /> <br />o <br />t'( <br /> <br />"''' (If <br /> <br />FIGURE 2 - 20" DIA. AND GREATER <br /> <br />NOTES: <br /> <br />1. .0 Trench alope will vary aa needed for conatructlon ea~ety <br />________l~__~,c:_c()rdance with OSHA requlre.ent,. and .Ita concfltlon.. . <br /> <br />2. The trench wIll be overexcavated <4" and backfIlled to grade <br />where the In-.ltu material. or. unacceptable for pip. b.ddlng <br /> <br />3. Unl.... oth.rwl.. .p.clfl.d, ....I.ct ",at.rlal" for InitIal <br />backfIll wll I b. coar.. .ond or grov.l wIth '" maxImum .Ize. <br /> <br />Supple..nt to: <br /> <br />00-<430-00 <br /> <br />nAHDAaO ... NO. <br />CO-430.20 <br /> <br />~CT~fW- 5 <br /> <br />DAn~ <br /> <br />u. s. D6n'. 01" AGftr cr4f'UU' <br />.orz. ~ArrON ~rrt2 <br /> <br />.0. COLQlUDO <br /> <br />Co- 430-PD-S <br />