This is Lionel's # 213 Operating Lift Bridge. The bridge is 17-1/2" high, 5-1/2" wide at the base and 30" long. The center span lifts 6-1/4" in the fully raised position. The bridge openings for trains are 4-1/4" high and 3-3/4" wide. The bridge was originally cataloged by Lionel in 1950, but not made. The bridge next appeared in their 2002 catalog and was finally produced. It is perhaps the longest wait for a cataloged item in toy train history! Photo taken September 2005.