M R Westco Inc

SEMA Construction is a full-service construction firm that serves clients throughout the states of Colorado and California. The company offers general contracting and design and build services for various commercial and industrial facilities. It develops a range of highways, roads, bridges, dams, reservoirs, airports and underground utilities. SEMA Construction also provides a variety of land development services, including value engineering and general site grading. The company also offers restoration, enhancement and protection services for environmental containment, industrial treatment, and waste disposal and quality facilities. Its railroad services include track construction, maintenance and rehabilitation, as well as excavation and drainage. SEMA Construction is headquartered in Centennial, Colo.

Hensel Phelps Construction Company is an employee-owned general contractor and multibillion dollar construction company. Hensel Phelps employs more than 1,000 supervisory personnel and more than 1,600 craftspeople nationwide. The company builds a range of project types, including new construction and renovation of commercial, educational, high technology, industrial, leisure, medical, multiresidence, public and transportation facilities, as well as a variety of other project types including projects for the federal, state and local governments throughout the continental United States. Hensel Phelps has its corporate office in Greeley, Colo.

Harrison Western Construction Corporation has been serving the American and international mining industry for more than 30 years. The company completes every facet of the mining development process for mines producing metals, coal and industrial minerals, including the excavation and support of declines, inclines, cross-cuts, raises and slope development. Since its inception, Harrison Western Construction Corporation has completed several heavy construction projects in different types of geographic environments. These projects have been completed for private companies and for federal, state and local governments. The company has the expertise to repair and re-support old mines to be re-opened for further inspection or development, as well as to safely install the necessary seals or bulkheads in the shafts and adits of mines that have reached the end of their economic life. Harrison Western Construction Corporation is a subsidiary of Harrison Western Group, which is a full-service heavy engineering and mining construction firm specializing in natural resource development.