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  2. Quarry Trails Metro Park - Wikipedia

    en.wikipedia.org/wiki/Quarry_Trails_Metro_Park

    Around March 2022, construction of a rock-climbing wall began at the park, to be 160 feet tall and about 1/2-mile wide, utilizing stones leftover from the quarry site. [2] Designed by Via Ferrata Works, it will be the first urban via ferrata in the United States. [3] The attraction opened in May 2023. [4]

  3. Gravel - Wikipedia

    en.wikipedia.org/wiki/Gravel

    Gravel (largest fragment in this photo is about 40 mm (1.6 in)) Gravel (/ ˈ ɡ r æ v əl /) is a loose aggregation of rock fragments.Gravel occurs naturally on Earth as a result of sedimentary and erosive geological processes; it is also produced in large quantities commercially as crushed stone.

  4. Oldcastle Materials - Wikipedia

    en.wikipedia.org/wiki/Oldcastle_Materials

    Oldcastle Materials was the fourth largest crushed stone producer in the nation in 2012, according to the USGS. [ 61 ] [ 62 ] The company ranked number three on Aggregate Manager 's 2012 list of the "top 25 construction aggregates producers" in the U.S., [ 63 ] and number three on its 2016 list of the nation's "top 25 crushed stone producers ...

  5. List of Superfund sites in Ohio - Wikipedia

    en.wikipedia.org/wiki/List_of_Superfund_sites_in...

    This is a list of Superfund sites in Ohio designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law.The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations. [1]

  6. Macadam - Wikipedia

    en.wikipedia.org/wiki/Macadam

    Size of stones was central to McAdam's road building theory. The lower 8 in (20 cm) road thickness was restricted to stones no larger than 3 inches (7.5 cm). The upper 2-inch-thick (5 cm) layer of stones was limited to stones 2 centimetres (3 ⁄ 4 in) in diameter; these were checked by supervisors who carried scales. A workman could check the ...

  7. Crushed stone - Wikipedia

    en.wikipedia.org/wiki/Crushed_stone

    Crushed stone or angular rock is a form of construction aggregate, typically produced by mining a suitable rock deposit and breaking the removed rock down to the desired size using crushers. It is distinct from naturally occurring gravel , which is produced by natural processes of weathering and erosion and typically has a more rounded shape.

  8. Construction aggregate - Wikipedia

    en.wikipedia.org/wiki/Construction_aggregate

    The great majority of crushed stone is moved by heavy truck from the quarry/plant to the first point of sale or use. According to the USGS , 2006 U.S. sand and gravel production was 1.32 billion tonnes valued at $8.54 billion (compared to 1.27 billion tonnes valued at $7.46 billion in 2005), of which 264 million tonnes valued at $1.92 billion ...

  9. Concrete recycling - Wikipedia

    en.wikipedia.org/wiki/Concrete_recycling

    Concrete may be considered waste according to the European Commission decision of 2014/955/EU for the List of Waste under the codes: 17 (construction and demolition wastes, including excavated soil from contaminated sites) 01 (concrete, bricks, tiles and ceramics), 01 (concrete), and 17.01.06* (mixtures of, separate fractions of concrete ...

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