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Stringfellow Acid Pits a former rock quarry in Jurupa Valley in Riverside County, California, which became a toxic waste dump and later a Superfund site. Deemed one of the most polluted sites in California in 1980s, and associated with mismanagement and scandal in the U.S. Environmental Protection Agency.
Sharp sand, also known as grit sand or river sand and as builders' sand, concrete sand, or ASTM C33 when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil [1] as well as for building projects. It is not cleaned or smoothed to the extent recreational play sand is. It is useful for drainage. [2]
In 2023, the aggregate industry in the United States mined and sold 1.5 billion tons of crushed stone valued at more than $24 billion and 920 million tons of construction sand and gravel valued at $11 billion. [1] [2] There are thousands of aggregate-producing companies in the US, operating in each of the 50 states, and employing 105,000 people.
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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.
This list of mines in the United States is subsidiary to the list of mines article and lists working, defunct and future mines in the country and is organised by the primary mineral output. For practical purposes stone, marble and other quarries may be included in this list.
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Pages in category "Sand" The following 44 pages are in this category, out of 44 total. ... Sharp sand; Singing sand; Slow sand filter; Soledad Canyon Sand and Gravel ...