This is serveral years old.
First, is the magnitude of costs and numbers. California currently houses over 152,000 inmates within its
32 correctional institutions. Each of the 32 institutions house an average of approximately 4,500 inmates.
Of the 152,000 total inmate population, approximately 15 percent, or 20,000 are criminal aliens. At an
annual cost of $20,981 per inmate, this equates to a total cost of almost $420 million just for housing the
criminal alien population in prison. These 20,000 criminal alien inmates occupy the equivalent of five
overcrowded prisons whose construction costs to house our criminal alien population exceed $1.3 billion at
overcrowded levels.
http://www.house.gov/judiciary/6030.htmif you wanted the perfect solution, it would be to build the prisons along the u.s.-mexican border. maximum security on the north side, and minimum on the south. so, if anyone escaped it would be into mexico! </s>