The iconic observation tower at Peninsula State Park near Fish Creek will be closed indefinitely because of public safety concerns related to structural deficiency issues. Park Superintendent Kelli Bruns says the Eagle Tower was closed to the public after the Department of Natural Resources received an inspection report Wednesday from a company hired to do a detailed inspection of the structure earlier this spring. Bruns says wooden beams that support three observation platforms and a staircase have decayed. The tower’s future remains uncertain. The 75-foot structure stands 225-feet above the Bay of Green Bay, providing extraordinary views of the bay and the upper peninsula of Michigan. The Eagle Tower was built in 1914 as a forest fire observation platform using logs cut in the park and without the use of machinery. It was rebuilt in the 1930’s by the Civilian Conservation Corps. In addition, parts of the tower were refurbished in the 1990’s.