ACE F40PH-3C 3101 powers train #2 past Cargill Salt's dredge, Mallard II, as the train heads north at Alviso on March 11, 2003. The dredge was working the south end of the bay between Alviso and Drawbridge, shoring up the levees. Mallard II has plied San Francisco Bay since being constructed in 1936. Ektachrome 100G