posted on Oct, 19 2010 @ 12:13 PM
Most of my research says no, it's a joke/slash rumor. The biggest problem with the idea is that there isn't a point in going to Catalina.
There is "Catalina trench" a sea floor trench that goes from the land to the island, but that is a natural phenomenon.
Also worth noting is rumors from divers that they worked on large piping near Catalina for the government.
But again, what purpose would a tunnel to that place serve?