the 1940s, and the cell doors are still in use today. FSP was the first prison in the world to have electric power, which was provided by the first hydroelectric powerhouse in California. After the state of California took sole control of the death penalty in 1891, executions were held at Folsom and San Quentin. A total of 93 prisoners were hanged at FSP between December 13, 1895, and December 3, 1937. Subsequent executions were carried out in the gas chamber at San Quentin. Due to an incorrect record, it is often mistaken that there were 92 executions, but there were in fact 93. The prison's first hanging occurred on 13 December 1895 when Chen Hane was "hanged by the neck until dead" at 10:00 am. The public was invited to witness the execution. In 1892 Hane was accused of murdering Lee Gong, even though a witness stated they saw Lee Sam shoot Gong; another said they thought Gong had been shot through a window while sitting at a desk. FSP industries include metal fabrication and a print shop, and the quarry at FSP provided granite for the foundation of the state capitol building and much of the gravel used in the early construction of California's roads. California's vehicle license plates have been manufactured at FSP since 1947. In 1968, Johnny Cash played a concert at the prison. Each attending prisoner lived in his own cell and nearly all were in an education program or learning a trade. Most of the attending prisoners who were released did not return to prison after being released. Laura Sullivan of National Public Radio said that the costs of housing prisoners "barely registered" in the state's budget. In 2009, Folsom was overcrowded, with 4,427 inmates. Around that year most of its prisoners who were released returned to prison after being released. Cemetery Connected to the prison on a hillside above Folsom Dam is the Folsom Prison Burial Ground (or Folsom Prison Cemetery); a burial location for former inmates that died while serving a prison sentence. In 2018, the El Dorado Hills Genealogical Society started the process of researching and trying to determine which unmarked grave stone belonged to whom; the grave stones originally had only numbers and they were updated to have names as well. Inmate programs California Prison Industry Authority (CALPIA) California Prison Industry Authority (CALPIA) program includes administration, a Braille enterprise, a