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<br />. <br /> <br />. <br /> <br />Unless otherwise authorized by the engineer, the riprap protection <br />shall be placed in eonJunction With the conatruction at the flllbankment <br />With only sufficient lag in cODstruction of the riprap protection as may <br />be necessary to allow for proper construction at the portion of the <br />elllbankment protected and to prevent mixture ot embankment &Ad riprap. The <br />contractor shall maintain the riprap protection until accepted, and 8.II:y <br />I118terial displaeed by any cause shall be replaced to the lines and grades <br />shown on the plans at no additional cost to the State. <br /> <br />When riprap and tilter material are dumped under water, thickness <br />of the !ayere shall be inereased as shown on the plans; and methods shall <br />be used that will minimize segregatieD. <br /> <br />10-3.2 - Wire-Enclosed R1prap -- The plans and supplemental speciti- <br />.. cations will show details at Wire-enclosed riprap and speeify the con- <br />struction procedure to be used. <br /> <br />. <br /> <br />l <br />, <br />, <br />I <br />I <br />I <br />I <br />~ <br />~ <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />10-3.3 - Grouted Riprap -- The stones shall be placed on the prepared <br />slope substantially to the dimensions shown on the plans. The stone8 <br />shall be thoroughly moistened and 8.II:y excess of tines shall be sluiced to <br />the underside ot the stone blanket before grouting. <br /> <br />The grout may be delivered to the place of tiDal deposit by 8.II:y means <br />that will insure uniformity and prevent segregation ot the grout. If <br />penetration at grout is obtained by gravity tlow into the interstices, the <br />grout will be 8paded or rodded into the interstice8 to cOlllPlete1y fill the <br />voids in the stone blanket. Pressure groutiD8 shall not unseat the stone8; <br />and after placill8 by this method, the grout shall be spaded or rodded into <br />the void8. Penetration of the grout shall be to the depth 8pecified on <br />the plans. When a rough surface is specified, stone shall be brushed <br />until trom one-tourth to one-half of the depth of surface stone i8 exposed. <br />For a smooth surface, grout 8hal1 fill the interstices to Within a 1/2 inch <br />of the surface. <br /> <br />Weep holes shall be provided throll8h the blanket a8 shown on the plans <br />or as directed by the engineer. Where the depth specified for grouting is <br />in exceas of 12 inches, such as cutott walls, the riprap 8hal1 be placed in <br />lifts at 12 inehes or less and each lift shall be grouted prior to placill8 <br />the next lift. The succeeding litts shall be constructed and grouted <br />before the grout in the previOUS litt has hardened. <br /> <br />Grout shall be placed only when the temperature i8 above 350p and <br />riaing. It shall be proteeted traa freezing and cured as specitied in <br />section . <br /> <br />10-3.4 - Concrete Biprap in Bags -- Cloth cement sacks about two- <br />thirds filled and securely tied or burlap grain sacks containing about <br />2/ 3 cubic faet at cODcrete and folded at the top are ilIIIIIediate1y placed <br /> <br />11-41 <br />