Editor’s Note: Caprock Chronicles is edited each week by Jack Becker, a librarian at Texas Tech University. This week’s essay, by Paul Carlson, emeritus professor of history at Tech, looks at the Ogallala Aquifer, the enormous underground water supply that under lies much of Great Plains. The Ogallala Aquifer is a large underground reservoir that extends 800 miles through the western High Plains; from the southern edge of South Dakota to the Llano Estacado in Texas and New Mexico,
