ST 3
ST 3 in ST 3 At Union ST, Norfolk County, Massachusetts received a condition grade of C (50/100). Built in 1957, the bridge carries 204K vehicles daily on ST 3 over HWY Union ST N Rotary. It is classified as structurally deficient.
Component Ratings
The riding surface — evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
ST 3 is a 69-year-old bridge located ST 3 At Union ST in Norfolk County, Massachusetts. The bridge carries ST 3 over HWY Union ST N Rotary with 6 traffic lanes, handling approximately 204K vehicles per day. Built in 1957 and reconstructed in 1978, the structure spans 43.9 meters.
The bridge received a Condition Grade of C (50/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 4/9 (poor), and substructure 6/9 (fair). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below — this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
ST 3 has a Condition Score of 50/100 (Grade C). Its deck is rated 6/9, superstructure 4/9, and substructure 6/9 on the NBI scale. The bridge is classified as structurally deficient.
ST 3 was built in 1957 and reconstructed in 1978, making it 69 years old. The average bridge age in the United States is 48 years.
ST 3 carries approximately 204K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 43.9 meters long and located on ST 3 in ST 3 At Union ST, Norfolk County, Massachusetts.
Yes, ST 3 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
ST 3 is located ST 3 At Union ST in Norfolk County, Massachusetts. The bridge carries ST 3 over HWY Union ST N Rotary. Its coordinates are 42.211439, -70.996769. It is maintained by State Highway Agency.
ST 3 carries ST 3 over HWY Union ST N Rotary. The bridge is 43.9 meters long and was built in 1957, with reconstruction in 1978.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.