Loy Clark

Founded in 1957, Loy Clark Pipeline Co. has been part of the Portland, Oregon, community for more than 60 years.

During that time, we have built infrastructure across the city and region. We provide construction services critical to communities. For instance, directional drilling, cable plowing, underground, conduit and vault, saw cutting, paving, asphalt and concrete, and vacuum excavation. The company is licensed in Oregon, Washington, California, Idaho and Montana.

Loy Clark Pipeline Co., founded by Mr. Loy S. Clark, was the first pipeline construction company in Oregon. Loy Clark brought the first natural gas lines into Portland, Oregon, beginning in 1957. Over the next several decades, Loy Clark diversified its services. Our list expanded by adding electrical/communication infrastructure, directional drilling, asphalt paving, saw cutting and vacuum excavation. We were one of the first companies to begin using horizontal directional drills, it is now the primary method to install conduits and pipe for electrical, communication and natural gas industries.

Today, we serve all major utilities in the Portland, Oregon, region and provides a unique variety of services to companies across the Pacific Northwest.

Our parent company

Loy Clark Pipeline is part of MDU Construction Services Group, Inc. With more than 5,000 skilled employees across the country and authorization to work in 47 states, MDU Construction Services Group provides industry-leading construction services. Our diverse group of companies constructs and maintains electric and communications lines, gas pipelines, fire suppression systems, and external lighting and traffic signalization. In addition, we provide expertise in utility excavation, inside electrical and mechanical services, and manufacture and distribute transmission line construction equipment and supplies.

MDU Construction Services Group is a subsidiary of MDU Resources Group, Inc., a major natural resources company. They provide value-added natural resource products and related services that are essential to energy and transportation infrastructure.

MDU Resources got its start as a small electric utility company in 1924. They have grown into a multi-billion dollar company whose diverse holdings, growth strategy and commitment to integrity have allowed it to consistently post strong earnings and earn the reputation of providing superior shareholder value. The company is headquartered in Bismarck, North Dakota, and has been traded on the New York Stock Exchange since 1948 under the symbol MDU.