[2][3][4] The historic Snohomish County settlement of Florence is located on the delta and gives the island its name.
Florence Island is connected to the mainland by three bridges heading in the directions of Stanwood to the north,[5] Silvana and Arlington to the east, and Warm Beach to the south.
A truss bridge carried the main vehicular traffic over the Stilliguamish river between Stanwood and Florence.
It was replaced by the current bridge in 1959 but remained open for local access for two decades.
The project involves creating a 230 acre estuary from previously diked farmland south of Boe Road on Florence Island.