sentences:  On August 28, 1948, during the Niigata Festival a fireworks accident on the bridge caused over 100 spectators to fall into the Shinano River, resulting in 29 casualties.Since then, all bridges across the river have become off limits to spectators during fireworks shows.On June 16, 1964, a magnitude 7.5 earthquake hit Niigata, causing major damage to nearly all bridges on the Shinano River.