David Barney

Ledcor IP Holdings Ltd. operates as a diversified construction company which serves civil and infrastructure, oil and gas, pipeline, building, mining, power, and telecommunications sectors. The firm also owns operations in property investment, forestry, aviation, and marine transportation services. The company was founded by William Lede in 1947 and is headquartered in Vancouver, Canada.

Part of MDU Resources Group, Inc., Harp Line Constructors Co. distributes electricity and natural gas. The company is based in Bismarck, ND. Harp Line Constructors was acquired by MDU Resources Group, Inc. on July 06, 1998.

MDU Construction Services Group, Inc. specializes in constructing and maintaining electric and communication lines. It provides a full spectrum of construction solutions, from underground utilities and excavation to electrical, mechanical and fire suppression systems as well as transmission line construction. The firm also provides industrial construction maintenance and turnaround, equipment rental sales and manufacturing. The company is headquartered in Bismarck, ND.

Part of MDU Resources Group, Inc., Harp Engineering, Inc. designs utility and telecommunication projects. The company is based in Kalispell, MN. Harp Engineering was acquired by MDU Resources Group, Inc. on July 06, 1998.

Part of MDU Resources Group, Inc., Centennial Energy Resources International, Inc. operates non-regulated electric generation stations. The company is based in Bismarck, ND.

Kent''s Oil Service, Inc. manufactures asphalt emulsions, custom asphalt cutbacks, dust control products and paving fabric distributor trucks serving. The company was founded in 1987 and is headquartered in Stockton, CA.

The Independent Petroleum Association of America manufactures oil and natural gas. The non-profit company is based in Washington. Barry Russell has been the CEO of the American company since 1980.

Oregon Columbia Chapter of the Associated General Contractors of America operates as a trade association. It represents the range of commercial construction companies, from industrial to building, heavy highway to multi-family residential. The company was founded in 1922 and is headquartered in Wilsonville, OR.

Wagner-Smith Equipment Co. is engaged in designing the line-stringing equipment in the industry. It manufactures, sells, rents and services overhead and underground line-stringing equipment and tools for the electrical power line and communication industry. The company was founded in 1917 and is headquartered in Burleson, TX .

WBI Energy, Inc. provides natural gas transportation, underground storage, processing and gathering services. It offers cathodic protection, facility inspections, leak detection, air and hydro excavation, and solar power installations. The company was founded in 2002 and is headquartered in Bismarck, ND.