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<br /> <br />l <br />,.e <br />,""~' <br /> <br />10... <br /> <br />'il <br /> <br />., <br /><' <br />~Il^, <br /> <br />.......:1." <br />T" <br /> <br />!.: <br /> <br />4251 <br /> <br />'Either water or membrane curing may be used on <br />concrete protettive coating, .but if membrane curing is <br />used, sealing compound shall be removed by approved <br />methods at the contractor's expense before placement <br />of structural concrete. The method of placing the <br />concrete shall be subject to the approv.al of the <br />contracting officer. Concrete for protective coating <br />shall not contain aggregate targer than 3/4-inch <br />maximum size and shall be of such composition to <br />develop a minimum compressive strength of 3,000 psi <br />at 28 days as determined by standard specimens. <br /> <br />The cost of all work connected with the placement of <br />the concrete protective coating in Buttress 10 shall be <br />included in the unit price per cubic yard bid in the <br />schedule for excavation, rock, for concrete dams. <br /> <br />89. EXCAVATION, ROCK, FOR <br />SPILLWAY OUTLET CHANNEL <br /> <br />The item of the sr.hedule for excavation, rock, for <br />spillway outlet channel includes aU rock excavation <br />required for the removal by April 1, 1974, of the <br />left-in-place dike, which is on the north and northeast <br />sides of the spillway outlet channel, as shown on the <br />drawings or directed. <br /> <br />90. EXCAVATION, ALL CLASSES, <br />FOR OUTLET CHANNEL <br />TRAINING WALL <br /> <br />The item of the schedule for excavation, all classes, for <br /> <br />, . 't.W~':: . <br />~ ,.~~~~,.t~' . <br />SPECIFICATIONS NO.O~.9,ti:5:. <br />(SUPPLEMENTAL N9,T~9J~~\'Et31 <br />"~"':~:::"', <br />P.rAiBiJ " <br />"~'f.',,: <br />.)::~ \t',.'. <br /> <br />C' <br /> <br />,'. <br />i <br /> <br />I.:.' <br /> <br />r<, <br /> <br />:... <br /> <br />.t. <br /> <br />k" <br />,'. <br />; <br />, <br /> <br />58. <br />