The Deer Isle Bridge encountered wind stability problems that were similar to a bridge found in which U.S. state?
Deer Isle Bridge The Deer Isle Bridge is a suspension bridge spanning Eggemoggin Reach in the state of Maine. The bridge is the only vehicular connection from the Maine mainland to Little Deer Isle, one of the segments that make up the island. The span was completed in March 1939 with a main span of 329 meters (1,088 ft). The bridge was designed by Holton Duncan Robinson and David Bernard Steinman. It encountered wind stability problems that were similar to those of the Whitestone Bridge and the original Tacoma Narrows Bridge, which collapsed shortly after it opened. The problems led to modifications which included numerous cable stays connecting cables to the tower and tower to the deck. The span today carries two narrow lanes of State Route 15.
Adel Bridge The Adel Bridge is located on the east edge of Adel, Iowa, United States. The 400 ft span carried traffic on River Street over the Raccoon River. The Dallas County Board of Supervisors received a petition to replace a deteriorating bridge at this location. The old bridge had been built where ferry service had been initiated in 1850, three years after the town had been established. They contracted with the King Iron Bridge and Manufacturing of Cleveland to build the two-span Pratt through truss bridge for $12,500. It was a primary river crossing into Adel until 1932 when the U.S. Highway 6 bridge was completed not far to the south. While it remains in place, it was closed to vehicular traffic in 2000. The bridge was listed on the National Register of Historic Places in 2002.