11th Street Bridge

Engineered by Harrington, Howard and Ash of Kansas City, this bridge replaced an earlier wooden structure. It was built by the Missouri Valley Bridge and Iron Company for $180,000. A multi-span concrete arch bridge, with 18 spans, it was long and wide. It had a railroad track in the center and one vehicular lane on each side of the track. • It was the first bridge built for the purpose of carrying automobiles across the Arkansas River • It was one of the longest concrete structures in the Midwestern United States • It was the first multi-span concrete bridge constructed in Oklahoma. In 1929, the original balustrades and Victorian-style lights were replaced with Art Deco guardrails and lights. A 1934 project constructed a second arched bridge immediately downstream and connected both bridges with a single deck. This brought the deck width to 52 feet 8 inches, with a roadbed that was wide and accommodated four lanes of traffic. ==Obsolescence==

Completion of the I-244 bridges in 1967 removed most vehicular traffic from the 11th street bridge. In 1980, it was closed to traffic, although it remained open to pedestrians. In 1996, it was added to the National Register of Historic Places. ==Present condition==

Time has not been good to the old bridge, and it has been rated as "quite dangerous" and unsafe for pedestrians by the City of Tulsa. There are holes in the deck, the pavement has buckled in many places, and weeds grow in the cracks. The gates were locked in 2008. Although it was considered as the centerpiece of a Route 66 exhibit, engineers estimated that it would cost $15 million just to be made safe for pedestrians. The conclusion was that the historic structure is "... too expensive to repair, too historic to demolish, and too valuable to ignore". The westbound bridge opened in July 2013 and temporarily carried both east and westbound traffic. The eastbound span of I-244 was then replaced and opened to traffic in September 2014 with overall completion scheduled for the spring of 2015. ==Cyrus Avery Centennial Plaza==

The ability to utilize the existing bridge, rather than having to build another one over the Arkansas, was said to be the major reason U.S. Route 66 was built through Tulsa. In commemoration of the Route and the man who helped bring it about, the Cyrus Avery Centennial Plaza is located adjacent to the east entrance of the historic Bridge in Tulsa, at the intersection of Southwest Boulevard and Riverside Drive. The first phase of the plaza included a display of flags of the eight states which were served by U.S Route 66. It was completed in July 2008 and dedicated on August 7, 2008. A skyway with an observation deck leads pedestrians from the visitors' parking lot across Southwest Boulevard. The plaza features a bronze sculpture, created by artist Robert Summers titled "East Meets West". The sculpture is long, wide and high. The sculpture depicts the Avery family riding west in a Model T Ford auto meeting an eastbound horse-drawn carriage. In 2020, the Route 66 Avery Plaza Southwest neon sign park opened at the west end of the Bridge. It includes replicas of three neon signs from Tulsa-area motels from the era, the Will Rogers Motor Court, Tulsa Auto Court, and the Oil Capital Motel. ==Proposed museum==

A museum to educate visitors about the significance of Route 66 has been proposed. It would be built on a hill adjacent to the existing parking lot. No date has been established for this project. ==Notes==