I 93
I 93 in .8 KM S Of JCT I93&Sr60, Middlesex County, Massachusetts received a condition grade of B (64/100). Built in 1963, the bridge carries 250K vehicles daily on I 93 over Water Mystic River.
I 93 carries a B on the BridgeSafety Condition Score with 64/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1963 and is now 63 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I 93 carries an average daily traffic count of 250,350 vehicles, with 8 lane(s) crossing Water Mystic River. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
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
I 93 is a 63-year-old bridge located .8 KM S Of JCT I93&Sr60 in Middlesex County, Massachusetts. The bridge carries I 93 over Water Mystic River with 8 traffic lanes, handling approximately 250K vehicles per day. Built in 1963 and reconstructed in 2011, the structure spans 78.6 meters.
The bridge received a Condition Grade of B (64/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 7/9 (good), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 93 has a Condition Score of 64/100 (Grade B). Its deck is rated 6/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 93 was built in 1963 and reconstructed in 2011, making it 63 years old. The average bridge age in the United States is 48 years.
I 93 carries approximately 250K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 78.6 meters long and located on I 93 in .8 KM S Of JCT I93&Sr60, Middlesex County, Massachusetts.
No, I 93 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I 93 is located .8 KM S Of JCT I93&Sr60 in Middlesex County, Massachusetts. The bridge carries I 93 over Water Mystic River. Its coordinates are 42.414758, -71.103889. It is maintained by State Highway Agency.
I 93 carries I 93 over Water Mystic River. The bridge is 78.6 meters long and was built in 1963, with reconstruction in 2011.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.