Miami-Dade County, Florida Bridges: North Bay Causeway across Biscayne Bay

January 2014 (25.84500 Degrees, -80.14333 Degrees) North Bay Causeway

The Intracoastal Waterway widens to become Biscayne Bay between Miami and Miami Beach. Its a couple of miles wide and crossed by six causeways that we will look at over the next few days. I somehow missed the Broad Causeway to the north, but it can be studied on other websites. The North Bay Causeway is next (to the south) and includes long bridges between Miami, Pelican Island, North Bay Island, Treasure Island, and Miami Beach. The bridges at Miami and Miami Beach have bascule spans to allow boat travel through the Bay. The East Biscayne Bay Bridges (FDOT #870551 and 870085) are 17 span, 1030 ft long precast I girder bridges with a 90 ft bascule span in the center (see photo above).

The West Biscayne Bay Bridges (FDOT #870551 and 870083) are 17 span, 510 ft long concrete slab bridges with two bascule leafs in the center (see photo above).  Both the East and West Biscayne Bay Bridges sit on driven precast piles supporting bent caps. The bridges were built in 1971 with two way traffic but in 1973 parallel bridges were built (to carry eastbound traffic) and the original bridges were modified to carry just westbound traffic.

Miami-Dade County, Florida Bridges: North Bay Causeway across Biscayne Bay by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.