sentences:  In the summer of 1988, cracks were found in the foundation of the Thomas Johnson Bridge, causing it to be closed for repairs over several months.People traveling north into Calvert County were forced to make a half-hour detour to the Benedict Bridge.People traveling south into St. Mary's County were likewise forced to either utilize the Benedict Bridge or take a free charter boat across the Patuxent River to a park and ride lot on the southern side.