Ogallala, Nebraska
Ogallala is a city in and the county seat of Keith County, Nebraska, United States. The population was 4,737 at the 2010 census. In the days of the Nebraska Territory, the city was a stop on the Pony Express and later along the transcontinental ...
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Ogallala Aquifer
The Ogallala Aquifer () is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. One of the world's largest aquifers, it underlies an area of approximately in porti ...