How does alcatraz get its power?

Alcatraz Island receives its power from a submarine power cable that runs from San Francisco to the island. The cable was installed in 1934 and is approximately 1.25 miles long. It carries electricity from the city's power grid to Alcatraz, where it is used to power the island's facilities, including the prison, lighthouse, and visitor center.

The submarine power cable is made up of three insulated conductors that are wrapped in a protective steel sheath. The conductors are made of copper and are each about 1 inch in diameter. The steel sheath is about 2 inches thick and helps to protect the cable from damage caused by the ocean environment.

The submarine power cable is buried underground for most of its length, but it is exposed for a short distance near the Alcatraz landing. The exposed section of the cable is protected by a concrete vault that is buried underground.

The submarine power cable is a critical piece of infrastructure for Alcatraz Island. It provides the island with the electricity it needs to operate its facilities and is essential for the safety and security of the island's residents and visitors.