The Pecos river runs from the Sangre de Cristo Mountains near Santa Fe, New Mexico through New Mexico and Texas and eventually into the Rio Grande River at the Texas-Mexico border near Del Rio, Texas.  In 1949, Texas and New Mexico signed the Pecos River Compact, and Congress ratified the Compact.  The Compact provides for the “equitable division and apportionment of the use of the waters of the Pecos River” with the intent to “remove causes of present and future controversies.”

Read more from Texas Agricultural Law Blog from Texas A&M AgriLife Extension  here.