Bay City is home to four bascule draw bridges that are manned 24 hours a day during the shipping season, which runs April 1st through December 31st.
The City of Bay City owns, operates and maintains the Independence and Liberty Bridges. The State of Michigan (MDOT) owns, operates and maintains the remaining two: Veterans Memorial and Lafayette Bridges.
The Independence Bridge was constructed in 1976 and has an approximate daily traffic count of 24,000 vehicles.
The Liberty Bridge was constructed in 1986 and has an approximate daily traffic count of 20,000 vehicles.