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00.1968 <br />CONCRETE RESERVOIR DESIGN <br />1191 <br />20•mil PVC Liner <br />Washed Concrete 20-mil PVC Liner ' <br />Washed Concrete <br />Solvent Weld Joints <br />sand Solvent Weld lalnts <br />Sand <br />':�E.,. ::M E•::.::.".'.','•' <br />.••r••••-.• <br />•:4-in. <br />Spike to Side <br />m(n. �� Pea Gravel 4-in. min. <br />'.,; of Trench <br />;• a e'. e` Pea Gravel <br />•3 •; <br />3-In. Concrete <br />In.; 4-1n. Perforated VCP • 3 Iri °, <br />• <br />.� .With Open Joints <br />4-in, Perforated VCP <br />With Open Joints <br />or Gunite <br />r � <br />_ or Perforated ACP <br />or Perforated ACP <br />(a) (b) <br />20-mll PVC Liner <br />Washed Concrete 20-mil PVC Liner <br />Washed Concrete <br />Solvent Weld Joints <br />Sand Solvent Weld Joints <br />,• <br />Sand <br />' ::::.. ......: •• <br />.;.:;::2i p;i%.'.: <br />J <br />mom' <br />• • • <br />...=d::::'• <br />�.E;•:•• <br />saYl— <br />Spike to Side <br />al Trench <br />4-in. min. <br />Pea Gravel <br />4-In. min. <br />Pea Gradel <br />3-in. Concrete <br />or Gunite••>:' <br />• ••. •'• <br />q.in. Perforated VCP <br />'o-^•• <br />4-In.Perfoated VCP <br />"�l^^•''*.'r<"i'+�' <br />•, 3 in. <br />With Open Joints <br />in•_ ' <br />With Open Joints <br />or Perforated ACP <br />or Perforated ACP <br />(a) (d) <br />Washed Concrete <br />/ Sand <br />.. <br />::•,'�•;;2 c:1''••C`x,,Spike <br />to Side <br />4-in. Perforatedof <br />Trench. <br />VCP With Open <br />Joints or <br />Perforated ACP <br />A <br />4-In, min.' <br />Pea Gravel <br />e <br />• <br />20-mil PV <br />Concrete or Gunite <br />,'9 In.•� <br />Weld J1 <br />Over PVC <br />S-in. min. <br />(a) - (1) For Use Where High Water Table <br />E%ISts,Pea Gravel Placed in Two Stages <br />Using Sides at Box to Separate Gravel <br />From Sand as Materials are Placed. <br />rig. 9. Varlations of Underdrains Incorporating Means for riltering Out rines <br />All types of underdrains shown have been successfully used. <br />RICHARD BRADY & ASSOCIATES, INC. F-60 <br />