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Hammerstone (formerly Birch Mountain Resources) is trying to climb to the top of the heap in the industrial minerals business. The company was exploring and developing precious metal properties, but is now concentrating on industrial mineral properties (primarily lime and concrete aggregate) in the Athabasca region of northern Alberta. Formed in 1994, the company has two major divisions: industrial minerals and mineral exploration and technology. In 2008, after defaulting on a loan with its primary banker, Birch Mountain Resources went into receivership. An affiliate of Brookfield Asset Management acquired the assets of the company, including a limestone quarry in Alberta, in 2009.

Hanson was quite a catch for HeidelbergCement, which bought the building materials giant in 2007 to become one of the world's top cement companies. Hanson Limited makes and delivers aggregates (crushed rock, sand, and gravel), ready-mixed and precast concrete, asphalt, bricks, flooring, and other building materials. Its products are used for civil as well as commercial, residential, and industrial jobs. Hanson also provides civil engineering services through Hanson Contracting (road surfacing) and Irvine-Whitlock (specialist brick and block laying). In the UK, Hanson Limited operates more than 350 manufacturing sites (more than half are cement plants) and maintains a delivery fleet of more than 1,000 vehicles.

Hanson Pipe & Precast is a division of Hanson Building Products North America, which is part of HeidelbergCement. Not to be confused with the kind smoked by Sherlock Holmes, Hanson Pipe & Precast makes pipes of the concrete variety. The company is the top manufacturer of concrete pipes and structural precast products in North America, with more than 150 plants in the US and Canada. Products include drainage structures, bridge arches, protective linings, ceilings and foundations, road noise barriers, and precast manholes, all of which are routinely used in the construction industry. Clients include state transportation departments, public authorities, the US Army Corps of Engineers, and private entities.

In 1949 J. M. "Bill" Harper founded Harper Construction, which eventually expanded operations to become Harper Industries. If Harper Industries can't help you get it built, not many can. The company operates a group of subsidiaries that provide a full range of construction services and products including design-build, project management, facilities maintenance, and construction materials and equipment. It serves commercial, power, and government clients for projects ranging from manufacturing plants and office buildings to schools and highways and bridges.

HeidelbergCement AG has operations in 40 countries in Africa, Asia, Australia, Europe, and North America. Subsidiary Hanson is a top building materials company in the UK. HeidelbergCement believes in concrete results. The company is one of the world's leading producers of cement and clinker (more than 100 million tons annually), and concrete; it is the largest cement producer in Germany. Cement, concrete, and aggregates together account for more than 90% of the company's sales. HeidelbergCement also has group services which manage fossil fuels and electricity for its operations and trade internationally in cement and clinker (an intermediate product used to make portland cement).

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