I-20 WBL
I-20 WBL in 1 MI NW Of Siloam, Greene County, Georgia received a condition grade of B (74/100). Built in 1968, the bridge carries 142K vehicles daily on I-20 WBL over SR 15.
I-20 WBL carries a B on the BridgeSafety Condition Score with 74/100. 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 1968 and is now 58 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-20 WBL carries an average daily traffic count of 142,000 vehicles, with 2 lane(s) crossing SR 15. 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-20 WBL is a 58-year-old bridge located 1 MI NW Of Siloam in Greene County, Georgia. The bridge carries I-20 WBL over SR 15 with 2 traffic lanes, handling approximately 142K vehicles per day. Built in 1968, the structure spans 57 meters.
The bridge received a Condition Grade of B (74/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I-20 WBL has a Condition Score of 74/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
I-20 WBL was built in 1968, making it 58 years old. The average bridge age in the United States is 48 years.
I-20 WBL carries approximately 142K vehicles per day (average daily traffic). The bridge has 2 traffic lanes. It is 57 meters long and located on I-20 WBL in 1 MI NW Of Siloam, Greene County, Georgia.
No, I-20 WBL 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-20 WBL is located 1 MI NW Of Siloam in Greene County, Georgia. The bridge carries I-20 WBL over SR 15. Its coordinates are 33.545881, -83.096383. It is maintained by State Highway Agency.
I-20 WBL carries I-20 WBL over SR 15. The bridge is 57 meters long and was built in 1968.
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.