Hidden history found beneath Alcatraz.

shushshush Senior MemberPosts: 6,259 Senior Member
This looks interesting.


"...... they have found the remains of a military fortress, which was thought to have been destroyed.

... taken in 1868, shows one of the many cannons that formed part of the garrison.


Prof Everett points to a spot where he has found evidence of a subterranean tunnel system.(The tunnels) would have been used for the fortifications. There would have been movement of man and ammunition; it would have been bomb proof and covered with earth so it would have been protected," he explains.
"We get signatures that indicate there is not only a tunnel, but magazine buildings too."


Joining the team is California State University Chico's Dr Tanya Wattenburg Komas, who is also director of the Concrete Preservation Institute.
Lying beneath the recreation yard is some of the oldest concrete she has ever seen in the US.
"Originally, the fortifications were earthen - they are constructed of dirt - but parts of them had concrete over them to reinforce them. The interesting thing is we weren't even making cement in the US at that time," she explains.
"That probably came as cement in barrels from Europe. To find it on the top of a mid-19th Century battery is very exciting."

cjp wrote: »..... Oh dear God, I've admitted to liking something Limey.I'll never hear the end of this.

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  • Make_My_DayMake_My_Day Senior Member Posts: 7,195 Senior Member
    A rocky island in the middle of S.F. Bay...makes perfect sense for a defense installation.
  • tennmiketennmike Senior Member Posts: 26,188 Senior Member
    Looks like those cannon are around 12" from the size of the cannonballs. They're BIG, at any rate. No telling what they'll find if they keep on excavating the old installation.
    If the U.S. Congress was put in charge of the Sahara Desert, there would be a shortage of sand in under six months.

  • NNNN Senior Member Posts: 23,987 Senior Member
    Maybe the escape route
    A Veteran is someone that served in the Military, it does not matter where they served.
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