The San Luis Peoples Ditch, the oldest continuously used ditch in Colorado, dates from April 10, 1852, holds court decree priority No. 1, and was dug by Colorado’s pioneer settlers. Colorado’s greatness is built upon irrigation. Original water rights were decreed to Dario Gallegos, Donaciano Gallegos, Juan A. Trujillo, Maria Rosa Vigil, Jose Ylario Valdez, F. Jaramillo, Rumalda Gallegos, Eulogia Gallegos, Rafaela Sanchez, Juan Martinez, Francisco Valdez, Manuel Vigil, Eusebio Bargas, Juan Valdez, Soledad Pacheco, Francisco Barela, Isabel Pacheco, Roberto Allen, Mariano Pacheco, Juan Pacheco, Juan Antonio Baca, A. A. Salazar, Eulogia Herrera, Juanita Herrera, Antonio Pacheco, Miguel Martinez, Rumaldo Martinez, Donaciano Martinez, and Francisco Sanchez.