In November 2014, Kiewit Mining Group entered a 10-year contract to provide contract mining services for the Walnut Creek Mine. The operation includes an 80-cubic-yard dragline, a 20-cubic-yard mass excavator, an 18-cubic-yard hydraulic backhoe and a fleet of 150-ton end-dump trucks to move more than 20 million cubic yards of material annually. The captive lignite operation can produce more than 2 million tons of lignite per year and incorporates a blending program that provides consistent quality lignite to fuel two 150-megawatt circulating-fluidized-bed power plants.
On January 1, 2011, Kiewit was awarded a contract to provide management services to mine and deliver lignite from the San Miguel Mine. Approximately 3.3 million tons of lignite coal is delivered to the adjacent 400-MW San Miguel Electric Cooperative, Inc. power plant, which is the owner of the mine. San Miguel Electric Cooperative, Inc. furnishes power and energy to Brazos Electric Cooperative, Inc. and the South Texas Electric Cooperative, Inc.
A Kiewit-led joint venture completed three contracts from January 2000 to March 2003 to construct portions of this diamond mine south of the Arctic Circle. A major feature of the project was the 3.9-kilometre water retention dike that encircles the diamond deposits — the first dike of its kind constructed in Canada.
The Agrium Phosphate Mine is located near Soda Springs, Idaho. Kiewit is providing contract mining services to provide 2 to 2.3 million tons of phosphate ore per year. The final ore is loaded into railcars for final delivery to the Conda Phosphate Plant.