In this July 7, 2011, file photo, Jim Breeden of the Golden Gate National Parks Conservancy, walks through the dungeons below the main cell house during a night tour on Alcatraz Island in San Francisco. (AP Photo/Eric Risberg, File)

Hidden tunnels found below Alcatraz prison

Archaeologists find buildings and tunnels under prison yard at famed San Francisco pen

Archaeologists confirmed a long-time suspicion of historians and say that famed Alcatraz prison was built over a Civil War-era military fortification.

Researchers found a series of buildings and tunnels under the prison yard of Alcatraz Federal Penitentiary, which once held Al Capone, SFGate reported Tuesday.

A study published last week in “Near Surface Geophysics” said archaeologists used ground-penetrating radar and terrestrial laser scans and historical maps and photographs. They found fully buried structures, ammunition magazines and tunnels.

“This really changes the picture of things,” study author Timothy de Smet, an archaeologist at Binghampton University, told PBS. “They weren’t erased from the island — they are right beneath your feet.”

Archaeologists are now planning more study to discover what else lies just below the surface.

READ MORE: B.C. bolsters protections of heritage, archeological sites

Historians believe workers built over existing structures when the prison was built in the 20th century.

Alcatraz first came to the attention of the U.S. government after it took control of California from Mexico in the 1840s. Its location in San Francisco Bay made it attractive for military fortification purposes.

During the Civil War, Fort Alcatraz was the official military prison for the West Coast.

In the 1930s, the first federal prisoners — deemed by the media to be the worst of the worst — began arriving. The last inmate left in 1963.

The Associated Press

Like us on Facebook and follow us on Twitter

Just Posted

Langley’s James Allenby is king of the links at RBC Canadian Open Regional Qualifier

Carded a bogey-free 7-Under 65 to take medallist honours.

Cupcakes against cancer: Langley parents rally to help family

Christine Tulloch, a crusader against cancer, has suffered a third relapse

Aldergrove chef sentenced to seven years for million-dollar drug operation

Raymon Ranu has been working as a cook since he was arrested for selling fentanyl and cocaine

Anti-gang forum aimed at helping Langley parents keep teens safe

Preventing gang recruitment is the focus of a forum to be held next week

Langley Blaze display depth despite temporary loss of pitchers

Injury and invitation to play for Team Canada leave team down three

Killer of Calgary mother, daughter gets no parole for 50 years

A jury found Edward Downey guilty last year in the deaths of Sara Baillie, 34, and five-year-old Taliyah Marsman

Raptors beat Bucks 120-102 to even series at 2-2

Lowry pours in 25 as Toronto moves within two games of NBA Finals

Body of missing snowmobiler recovered from Great Slave Lake

Police confirm the body is that of one of three missing snowmobilers

Toddler seriously injured after falling from Okanagan balcony

RCMP are investigating after a two-year-old boy fell from the balcony of an apartment in Kelowna

Cost jumps 35% for Trans-Canada Highway widening in B.C.

Revelstoke-area stretch first awarded under new union deal

Is vegan food a human right? Ontario firefighter battling B.C. blaze argues it is

Adam Knauff says he had to go hungry some days because there was no vegan food

Winds helping in battle against fire threatening northern Alberta town

Nearly 5,000 people have cleared out of High Level and nearby First Nation

Man pleads guilty in Surrey crash that killed two Abbotsford women

Sarah Dhillon and Paige Nagata died following head-on collision on Nov. 4, 2018

Most Read