IH 345 NB Conn J
IH 345 NB Conn J in At Ih30/Ih345 Interchange, Dallas County, Texas received a condition grade of B (64/100). Built in 1971, the bridge carries 194K vehicles daily on IH 345 NB Conn J over Main Good Latimer Etc.
IH 345 NB Conn J 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 1971 and is now 55 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. IH 345 NB Conn J carries an average daily traffic count of 194,018 vehicles, with 2 lane(s) crossing Main Good Latimer Etc. 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
IH 345 NB Conn J is a 55-year-old bridge located At Ih30/Ih345 Interchange in Dallas County, Texas. The bridge carries IH 345 NB Conn J over Main Good Latimer Etc with 2 traffic lanes, handling approximately 194K vehicles per day. Built in 1971, the structure spans 335.6 meters.
The bridge received a Condition Grade of B (64/100) based on Federal Highway Administration inspection data. Its deck is rated 5/9 (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
IH 345 NB Conn J has a Condition Score of 64/100 (Grade B). Its deck is rated 5/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
IH 345 NB Conn J was built in 1971, making it 55 years old. The average bridge age in the United States is 48 years.
IH 345 NB Conn J carries approximately 194K vehicles per day (average daily traffic). The bridge has 2 traffic lanes. It is 335.6 meters long and located on IH 345 NB Conn J in At Ih30/Ih345 Interchange, Dallas County, Texas.
No, IH 345 NB Conn J is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IH 345 NB Conn J is located At Ih30/Ih345 Interchange in Dallas County, Texas. The bridge carries IH 345 NB Conn J over Main Good Latimer Etc. Its coordinates are 32.783056, -96.787064. It is maintained by State Highway Agency.
IH 345 NB Conn J carries IH 345 NB Conn J over Main Good Latimer Etc. The bridge is 335.6 meters long and was built in 1971.
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.