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<br />I <br /> <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />It( <br /> <br />I <br /> <br />I <br />I <br /> <br />I <br />I <br /> <br />I <br /> <br /> <br />I <br /> <br />.JL.- Filter gravel <br /> <br />~ch dla. hol8s in riser <br />to dewater sediment storage <br /> <br />Temporary storage <br /> <br />Permanent <br />pool and <br />sediment <br />storage <br /> <br />OrifICe pia <br />ij requ~ed <br /> <br />Slotted riser <br /> <br /> <br />PVC principal <br />spillway pipe <br /> <br />Outlet protection <br />ff required <br /> <br />Figure 6.1-6: Slotted riser with PVC pipe <br /> <br />Prefabricated slotted riser <br /> <br /> <br />10/89 <br /> <br />6,1.9 <br />