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Knife River Focused on Recycling

MDU Resources Group, Bismarck, ND, issued its 2010 sustainability report, entitled “Building a Strong America. “The idea of sustainability continues to evolve as we, along with the rest of the world, become more conscious of our impact on the planet. We continue our efforts at MDU Resources to minimize harmful impacts,” reads the report in its introduction.

Recycling is a key to MDU Resources’ sustainability efforts. At a number of its company locations, MDU Resources recycles various materials, including, but not limited to, construction materials, computers and electronics, electrical equipment, light bulbs, paper, scrap metal, appliances, coal combustion ash, used oil and batteries.

MDU Resources’ subsidiary Knife River Corp. is an aggregates producer with a long-standing practice of recycling and reusing building materials. This conserves natural resources, uses less energy, alleviates waste disposal problems in local landfills and ultimately costs less for the consumer.

Knife River recycles or reuses recycled asphalt pavement, pre-consumer asphalt shingles, refined fuel oil, demolition concrete, returned concrete at ready-mix plants, fly ash, slag, silica fume and other cement-replacement materials, and dimension stone reject material.

Jebro Inc., a Knife River Corp. company in Sioux City, Iowa, has been recycling used oil since 1989 and used oil filters since 2006. In both cases, residual oil is recycled into viable products. Oil filters, once emptied of oil, are turned into No. 1-grade recycled steel that can be shipped to smelters around the United States. Recovered oil is recycled and used in emulsified asphalt products. Jebro’s service area includes parts of Iowa, Nebraska, South Dakota, Missouri and Kansas.

In 2009, Jebro recycled approximately 31,750 gallons of oil and 291 tons of steel.

Corporately, MDU Resources annually recycles approximately 45 tons of paper at its corporate headquarters.

The corporation also has been recycling computers and electronics at its corporate and business unit headquarters office locations since 2005. Recycling computers and electronic components ensures that hazardous materials associated with some of their components are disposed of in a manner that meets regulations. Fluorescent/mercury halide lamps are recycled at company office locations.