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CANYON SUBDRAIN ALTERNATE DETAILS <br />ALTERNATE 1: PERFORATED PIPE AND FILTER MATERIAL <br />12- MINIMUM_ <br />FILTER MATERIAC MINIMUM VOLUME OF 9 FT.' 4.=voly;':15*'\ / <br />/LINEAR FT. 6' 0 ABS OR PVC PIPE OR APPRO' <br />SUBSTITUTE WITH MINIMUM 8 (1/4 0} PERFS.NIMUM LINEAR FT. IN BOTTOM HALF OF PIPE. <br />ASTM 02751, SOR 35 OR ASTM 01527. SCHO. <br />ASTM 03034, SOR 35 OR ASTM 01785 SCHO, LO B.11'"'IMUM <br />FOR CONTINUOUS RUN IN EXCESS OF 560 FT. <br />USE 8'0 PIPE <br />6 MINIMUM. 6111 <br />. MI <br />A-1 <br />VED <br />40 ,C o LIlli <br />FILTER MATERIAL <br />SIEVE SIZE PERCENT PASSING <br />1 INCH 100 <br />3/4 INCH 90-100 <br />3/8 INCH 40-100 <br />NO. 4 25-40 <br />NO. 8 18-33 <br />NO. 30 5-15 <br />NO. 50 .0-7 <br />NO. 200 0-3 <br />ALTERNATE 2: PERFORATED PIPE, GRAVEL AND FILTER FABRIC <br />wK-- 6 - MINIMUM OVERLAP 6' MINIMUM OVERLAP '*--4 <br />A <br />"7\Un In,-6- MINIMUM COVER 9 <.B <br />2' MINIMUM BEDDING C MINIMUM BEDDINGZ:q[ <br />GRAVEL MATERIAL 9 FT'/LINEAR FT.B-2 <br />PERFORATED PIPE: SEE ALTERNATE 1 <br />GRAVEL: CLEAN 3/4 INCH ROCK OR APPROVED SUBSTITUTE <br />FILTER FABRIC: MIRAFI 140 OR APPROVED SUBSTITUTE <br />PLATE EG-2 <br />69 <br />A-2