tumill –
“WHERE ARE SOME OF THE BACK-UP ERUVIN? I COULDN’T FIND ONE!”
I am sure if I showed you a tzuras hapesach you would not know bein yemino lsmolo. Please, you are not interested that there be an eruv altogether. This is typical of the anti-eruv group to seek all means to negate eruvin. In any case, the back-up eruvin were established for two reasons: 1) In case the eruv is ripped on Shabbos. 2) That people like you should not be able to get their hands on it. Hence this eruv is not publicized. Stay out of things you know nothing about.