Geosyntec was engaged by a global mining client to review and improve the operation and maintenance program for the eight diesel engines that generate power for the remote mining site in Northern Alaska. The expansive open-pit mine is powered by eight generators able to provide up to 40 megawatts of electric power for mining equipment, mill operations, worker accommodations, wastewater treatment, and other uses. The diesel engines are equipped with a selective catalytic reduction (SCR) emissions control system that uses urea-injection to control emissions of nitrogen oxides. Following a series of permit violations due to excess nitrogen oxide emissions, Geosyntec was engaged to review and improve the process controls, standard operating procedures, and associated employee training program.