17 November 1976 PODED-G Quarry, Rock Crushing, Screening and Central Mix Batch Plant Operations for Cleanup at Enewetok Atoll, M.I. b. c. Estimated bulking factors for in-place stone 35%¢ Percentage of yield from controlled quarry + blasting and excavating 15%- d. Average thickness of hard reef rock 2 feet + e. To insure a minimum buffer width of 100 feet between the reef front and seaward edge of the quarry site and a similar landward buffer zone of 100 feet from the shoreline high water mark, use 250 feet for the average width of quarry. ‘3. Estimated quarry surface area. a. Equivalent excavated rock volume 2000 c.y./1 + bulking factor b. = 2000/1.35 = 1,482 cu.yd. Total volume of excavation to yield 1,482 cu.yd. 1482 cy/yield factor = 1482/0.15 = 9880 cu. yds c. Length of borrow site using an average depth of 2 feet and width of 250 feet Length = d, (9880 c.y.)(27 c.f£./c.y.) (2 ft) (250 ft) = 534 feet An experience factor has indicated a multiple of 1.5 should be used for estimating the required surface area of a potential coral ledge quarry site. e. The approximate surface area dimensions for the armor shore quarry are 250 feet x 534 feet (1.5) USE E. 250 feet width x 800 feet length ESTIMATED AREA OF BORROW SITE FOR CONCRETE AGGREGATE 1. The borrow for concrete aggregates shall be obtained from the disturbed undersized coral rock remaining after armor stone quarry operations. Crushing, screening and washing of borrow materials will be required.