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Pikeville Cut-Through. The Pikeville Cut-Through is a rock cut in Pikeville, Kentucky, United States, created by the U.S. Army Corps of Engineers, through which passes a four-lane divided highway (Corridor B, numbered as U.S. Route 23 (US 23), US 119, US 460, and KY 80), a railroad line (CSX' Big Sandy Subdivision), and the Levisa Fork of the Big Sandy River. [1]
A cubic yard (symbol yd 3) [1] is an Imperial / U.S. customary (non-SI non-metric) unit of volume, used in Canada and the United States. It is defined as the volume of a cube with sides of 1 yard (3 feet , 36 inches , 0.9144 meters ) in length .
The main body of the structure contains approximately 6,500,000 cubic yards (5,000,000 m 3) of concrete. High water releases are controlled by a set of outlet works with five gates, capable of releasing 40,000 cubic feet per second (1,100 m 3 /s), and a spillway controlled by two 50.0 ft × 56.4 ft (15.2 m × 17.2 m) tainter gates .
Work resumed in July 1870, and the shaft was sunk to 33 feet (10 m) below mean low water. The rock was hand-drilled that year, with 8,306 cubic yards (6,350 m 3) removed. Steam-powered equipment was added the following year, speeding up the work. Thirty thousand cubic yards of underwater broken stone were removed by dredging.
ISO 14688 grades gravels as fine, medium, and coarse, with ranges 2–6.3 mm (0.079–0.248 in) for fine and 20–63 mm (0.79–2.48 in) for coarse. One cubic metre of gravel typically weighs about 1,800 kg (4,000 lb), or one cubic yard weighs about 3,000 lb (1,400 kg). Gravel is an important commercial product, with a number of applications.
K D = around 3 for natural quarry rock; K D = around 10 for artificial interlocking concrete blocks; S r = (ρ r / ρ w is the relative density of rock, i.e. (ρ r / ρ w - 1) = around 1.58 for granite in sea water; ρ r and ρ w are the densities of rock and (sea)water (-) θ is the angle of revetment with the horizontal
A rock-cut basin is a natural cylindrical depression cut into stream or river beds, often filled with water. Such plucked-bedrock pits are created by kolks ; powerful vortices within the water currents which spin small boulders around, eroding out these rock basins by their abrasive action.
Mineral resource estimation is used to determine and define the ore tonnage and grade of a geological deposit, from the developed block model.There are different estimation methods used for different scenarios dependent upon the ore boundaries, geological deposit geometry, grade variability and the amount of time and money available.