(Richmond, IN)--Monday is the day that begins three bridge closures in Richmond that will last until the end of August.  The 20^th Century Bridge, which is also referred to as the Richmond Avenue Bridge near Purina, is closing for extensive repairs.  It includes what passes over Sheridan Street, which is actually a separate bridge.  Also Monday, Bridge Avenue closes from Sim Hodgin Parkway to North West J Street.  Richmond Community Schools is adjusting their bus routes as a result of the closures.