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Oldcastle Materials Inc. is a supplier of asphalt, concrete, and other building materials, and also offers construction and paving services. The Atlanta-based company is a subsidiary of CRH plc, a publicly traded international group of diversified building materials businesses, [2] [3] and has approximately 18,000 employees at 1,200 locations, as of March 2018.
CRH entered the United States in 1978 by buying Amcor, a concrete products group in Utah which would then form the basis of the company's U.S. division, which is now called Oldcastle Inc. Subsequent large purchases in the US included Callanan Industries, a New York State based aggregates and asphalt producer in 1985. [6]
Though now out of print, this guide remains a valuable resource for information about artists and publishers within the underground comix genre. In 2006, Dan Fogel, who was an advisor and contributor to the Overstreet guide, published Fogel's Underground Comix Price Guide. In 2010, a supplementary magazine was introduced, encompassing ...
In the 1960s, after abandoning a project to create an arrowhead price guide, Overstreet turned his attention to comics, which had no definitive guide. [1] Comic back-issue prices had stabilized by the end of the 1960s, [2] and, Jerry Bails, who had recently published the Collector's Guide to the First Heroic Age, was considering creating a ...
Ponies began to be used underground, often replacing child or female labour, as distances from pit head to coal face became greater. The first known recorded use in Britain was in the County Durham coalfield in 1750; in the United States, mules were the dominant source of animal power in the mine industry, with horses and ponies used to a ...
Tunnel Construction. Tunnels are dug in types of materials varying from soft clay to hard rock. The method of tunnel construction depends on such factors as the ground conditions, the ground water conditions, the length and diameter of the tunnel drive, the depth of the tunnel, the logistics of supporting the tunnel excavation, the final use and shape of the tunnel and appropriate risk management.
In 2012, EPA published how to screen buildings vulnerable to petroleum vapor intrusion, [12] and in June 2015, U.S. EPA finally released its "Technical Guide for Assessing and Mitigating the Vapor Intrusion Pathway from Subsurface Vapor Sources to Indoor Air" and "Technical Guide For Addressing Petroleum Vapor Intrusion At Leaking Underground ...
A schematic view of a station box. A station box is a term in the construction industry: It describes a box-like underground structure for a transportation system, for example a metro or tube station. [1] Station boxes are built in two methods – "top-down" or "bottom-up".