Complex sentence: On July 26,1983, the bridge was closed after it was found to be danger of collapse and repairs were done, but it again was closed in the 1990s and replaced with a modern bascule bridge in 1998.
Split into simpler sentences: On July 26,1983, the bridge was closed after it was found to be danger of collapse. It reopened after repair, but was closed in the 1990s before being replaced with a modern bascule bridge in 1998.