It is built of adobe blocks with thick walls and roofs of boards covered with a thick layer of dirt. Inside each cell, a steel cage was constructed. This was then plastered. Six prisoners were kept in each cell.
The adobes were made from a huge hill of caliche located on the property. This stuff is hard as a rock. In fact, the sides of the hill were excavated and rooms carved into the verticle hillsides. Some housed prisoners. Others were offices. At any rate, the same cages built of strap steel were constructed inside the rooms.
The hillside room
The "dark cell" was located within the hillside units. This was solitary confinement. It was totally dark. The room was about 15 feet on a side with a covered stove pipe in the ceiling for air. Inside the room was a strap steel
Women were also housed at the prison, though not in big numbers. For one thing, there were so few women in the
One woman was sentenced to the Yuma prison along with her sister for running off with a pair of vaudeville jugglers. What a place.