longest tunnel in united states i san francisco Franc leco aug 30 the longest railroad tun tunnel net la in the tb united and one ono tbt chatwill th atwill will bo cambered among the four oar longed longest in the world will be built through the sierra naiad el of california it th the pros out pi plans 0 of B 11 harriman are carried outs out say the tho chronicle chief easl oer hood bai bee ent seat ont out a corpe corps ol 01 fifteen man to make preliminary surveys and their work la Is expected to be completed in elz six mor mot 1 3 the tannel tunnel project which will involve 11 an outlay a am to WO the borin boring ot of a hole feet or something over avs ulli miles la length through the heart ot of the Si bistras besides saying a climb ot of 1600 feet toot the tunnel will shorten be he road boat miles and to I 1 expected to effect offset a great ains 1 la in operating ses it la to elated stated that with nith this thle teasel aad and the other plans of the company for tar th straightening of curves and reducing of grades la in nerada aad sod utah completed passenger could b hot run between san and easily la 10 two and a halt daye abie m 01 an storage peed speed of the whole ot at 00 not more wage than forty miles call a hoar hoof new