Big Springs is a village in Deuel County, Nebraska, United States. The population was 400 at the 2010 census. The first name of the settlement was "Lone Tree", after a large cottonwood tree standing alone on the prairie near the town. It was believed to be over 100 years old at the time of first settlement and could be seen by riders on the Pony Express a…Big Springs is a village in Deuel County, Nebraska, United States. The population was 400 at the 2010 census. The first name of the settlement was "Lone Tree", after a large cottonwood tree standing alone on the prairie near the town. It was believed to be over 100 years old at the time of first settlement and could be seen by riders on the Pony Express and travelers on the Oregon Trail. Sam Bass's gang reportedly divided $60,000 in loot under the tree from an 1877 robbery of a Union Pacific train.