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1 <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />~1 <br />I~ <br />B. Fine and coarse aggregate shall conform to ASTM C 33. <br />C. Water shall be potable. <br />D. Admixtures shall conform to ASTM C 494; calcium chloride will not be permitted. <br />2.5 CORRUGATED STEEL PIPE <br />A. Corrugated steel pipe shall consist of 12-gauge galvanized steel pipe with helical or <br />annual corrugations. The pipe must be free of rust, gaps in seams, holes, and <br />deformations that reduce the inside diameter by more than 2 inches. <br />2.6 DRAIN PIPE <br />Not Used. <br />2.7 DURABLE ROCK <br />A. Durable rock shall consist of rock which gives off a ringing sound when struck with a <br />hammer. <br />2.8 DISPOSAL OF MA'rFRTAi c <br />A. All logs, stumps, roots, brush, rotten wood, structural demolition debris, and other <br />refuse resulting from demolition activities shall be hauled to an approved landfill. <br />' 2.9 RIPRAP <br />A. Riprap shall be hard, durable and well graded in order to eliminate the presence of <br />large voids when place. <br />2.10 STEEL <br /> <br /> <br />1 <br /> <br />~- <br />~~ <br />J <br />A. Structural steel shall conform to the requirements of ASTM A-36, all purpose steel. <br />B. Reinforcing steel shall be made of deformed new billet stock and shall conform to <br />ASTM A 615, Grade 60. All reinforcing steel shall be free from heavy rust, scale, or <br />other coatings that will destroy or reduce the bond. <br />PART 3 EXECUTION <br />3.1 GRNF.RAi. <br />A. All adit closures shall be coordinated with the RESIDENT PROJECT <br />REPRESENTATIVE and will conform to rules and regulations governing mine closures <br />as issued by the Colorado Division of Minerals and Geology. <br />' Cr7 <br />