The Sacramento Rail Yards is an area north of Downtown on the East side of Interstate 5.  It functioned as the Southern Pacific Railroad maintenance yard from the mid 1800's to late 20th century.  It is currently in the planning/early design stages of urban-infill redevelopment.  Extensive soil contamination has been an ongoing problem at the site since the 1980's, due to the the heavy industrial work that occurred there under Southern Pacific's ownership.