The document summarizes an 18.14 kW solar photovoltaic array installed at the Grand Canyon Visitor Center in Grand Canyon National Park. The system was installed by Architectural & Environmental Associates and was a gift from the local utility, Arizona Public Service. The solar array provides an average of 30,000 kWh annually and offsets about 30% of the Visitor Center's energy needs. It will save over 7 tons of sulfur dioxide and 3 tons of nitrogen oxides from being emitted each year.