The Naval Ammunition Depot (NAD) near Hastings, Nebraska was the largest United States World War II naval munitions plant operating from 1942 to 1946 and produced over 40% of the U.S. Navy's munitions.
There are 700 earthen/concrete bunkers and over 1,000 ammunition vaults and storage buildings along U.S. Highway 6. The NAD employed 10,000 workers including over 1,900 military personal and the population of Hastings nearly doubled from 15,500 to some 25,000, creating a housing shortage.
A tremendous explosion on September 15, 1944, killed nine and injured 53 and the blast was felt 100 miles away in Lincoln.
Today the bunkers are used for a variety of purposes including storage, pork production and a recreational hunting facility.
This was taken for another 52 Week Photography Challenge in color, however, I thought converting it to B&W would give it a more ominous look.