Areas of inquiry included Coastal Protection and Infrastructure, Coastal Neighborhoods, and The Pequonnock and Inland Watercourses.
The City of Bridgeport has a land area footprint of only 16 square miles. This map highlights the parcels potentially impacted by storm surge, sea level rise and flooding due to stormwater runoff. High value properties are located within the flood plain and coastal threat zone, which represent nearly half of the developable parcel area in the city and an improvement value of $2.6 billion.
Stormwater flows to the sea via streams, culverts, subsurface drainage pipe. This combination of natural and manmade water channels is typically hidden behind properties or buried below ground. Trash and pollution impact water quality and impair flow. Combined sewer overflow discharges are an ecological challenge for Bridgeport’s estuaries during major storm events. Repetitive street flooding occurs in the valleys and low lying areas due to both runoff and sea level rise.
Red buildings fall in FEMA’s Flood Insurance Rate Map (FIRM) zone. These buildings are in zones which FEMA has delineated as special hazard areas with associated risk premiums. The orange buildings are at risk of flooding according to the modeled storm surge of a category four hurricane.
The current street infrastructure in Bridgeport is at risk to flooding resulting in potential damages to adjacent properties. This expense is illustrated on the map with a large number of FEMA insurance claims, shown as pink dots, near flood prone streets, seen in blue.
New FEMA Digital Flood Insurance Rate Maps have been developed for the Connecticut coastal areas. The risk zones reflect repetitive loss claim adjustments due to pluvial and storm surge flooding. Where Base Flood Elevations are associated with risk zones, they are noted in feet above sea level.
Commercial corridors developed along the spines of Bridgeport’s peninsulas, on high ground and following Native American and Colonial trading routes that predate the city, as indicated on the Historic Overlay Map. Industrial zones located along rivers and estuaries for shipping access are most at risk from storm surge flooding and sea level rise.
Learn more about Bridgeport’s development over time in the Historic City section.
This map illustrates the unconsolidated glacial and postglacial deposits of Connecticut. The surficial deposits along the coastline are typically fine grained sand and gravel glacial deposits and alluvium, beach sand or tidal marsh soils, while the upslope consists of heavier rock. The soils along the coast are well-drained due to the predominance of sand and gravel and are well suited for infiltration of stormwater though raingardens, bioswales or other BMPS.
The topography of Bridgeport, the form of the land and the manmade features upon it, is illustrated here. Areas at risk to pluvial and storm surge flooding are indicated, along with the large inventory of vacant/open parcels and brownfield sites.
While Connecticut is generally considered to be a wealthy state, many of its cities are relatively poor compared to other, less-urban parts of the state.
A solid orange line demarcates 50 feet in elevation, while a dashed orange line limns the 100 foot boundary. In 2100, only land 100 feet above sea level will be safe from possible storm surge.