It was carved by the retreat of the glaciers during the last ice age approximately 13,000 years ago.

Bridgeport Harbor is a federal shipping port and a terminus of the Bridgeport & Port Jefferson Steamboat Company, one of the oldest ferry companies in the nation.

It is due east of the smaller Black Rock Harbor which is also in the city of Bridgeport.

[2][3][4][5] Bridgeport's Success Lake (Connecticut) and Stilman Pond both egress via the Yellow Mill Channel and into the tidal marsh at the top of the harbor.

The harbor is located at the end of 8/25 connector, where it merges into Interstate 95, near the Bridgeport (Metro-North station), a stop for Amtrak, Metro-North and Shoreline East trains.