I-26
I-26 in 5 MI NW Of Columbia, Richland County, South Carolina received a condition grade of B (64/100). Built in 1964, the bridge carries 143K vehicles daily on I-26 over I-20.
I-26 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 1964 and is now 62 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-26 carries an average daily traffic count of 143,200 vehicles, with 10 lane(s) crossing I-20. 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-26 is a 62-year-old bridge located 5 MI NW Of Columbia in Richland County, South Carolina. The bridge carries I-26 over I-20 with 10 traffic lanes, handling approximately 143K vehicles per day. Built in 1964 and reconstructed in 1983, the structure spans 85.3 meters.
The bridge received a Condition Grade of B (64/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 6/9 (fair), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-26 has a Condition Score of 64/100 (Grade B). Its deck is rated 7/9, superstructure 6/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-26 was built in 1964 and reconstructed in 1983, making it 62 years old. The average bridge age in the United States is 48 years.
I-26 carries approximately 143K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 85.3 meters long and located on I-26 in 5 MI NW Of Columbia, Richland County, South Carolina.
No, I-26 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-26 is located 5 MI NW Of Columbia in Richland County, South Carolina. The bridge carries I-26 over I-20. Its coordinates are 34.036944, -81.110556. It is maintained by State Highway Agency.
I-26 carries I-26 over I-20. The bridge is 85.3 meters long and was built in 1964, with reconstruction in 1983.
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.