The tunnel discovered Tuesday was about 40 feet deep, 4 feet wide and 4 feet high. Big Mexican border drug tunnel between San Diego and Tijuana discovered Thursday, December 01, 2011 http://www.silive.com/news/index.ssf/2011/12/big_mexican_border_drug_tunnel.html SAN DIEGO -- The investigation into the largest marijuana bust at a cross-border tunnel followed a familiar timeline. It began in May and ended in November. The secret passage linking warehouses in San Diego and Tijuana -- equipped with a hydraulic lift, electric rail carts and a wooden staircase -- highlights an emerging seasonal trend. Tuesday's find netted more than 32 tons of marijuana -- nearly 17 tons at a warehouse in San Diego's Otay Mesa area, about 11 tons inside a truck in the Los Angeles area and 4 tons in Mexico.