April 19, 2024

TJ Bridge Closed Overnight 7/24-25


The Maryland Department of Transportation State Highway Administration will perform routine maintenance on the MD 4 (Governor Thomas Johnson) Bridge in Calvert and St. Mary’s counties starting at 10 p.m. Monday, July 24, weather permitting.  Lanes will open to traffic no later than 5 a.m. Tuesday morning, July 25.

SlackWater: Was the Bridge Worth It?

Flagging on Bridge

The Governor Thomas Johnson Bridge opened 40 years ago this week, connecting St. Mary’s and Calvert counties.

Was the Thomas Johnson Bridge Worth It?


In 1975 Calvert Cliffs Nuclear Power Plant commenced. In 1978 the Gov. Thomas Johnson Bridge opened to traffic. SoMD changed forever.