IS 270 E
IS 270 E in S 3069 T 46 N R 5 E, St. Louis County, Missouri received a condition grade of B (69/100). Built in 1965, the bridge carries 138K vehicles daily on IS 270 E over Up RR Fee Fee CR.
IS 270 E carries a B on the BridgeSafety Condition Score with 69/100. 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 1965 and is now 61 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. IS 270 E carries an average daily traffic count of 138,256 vehicles, with 10 lane(s) crossing Up RR Fee Fee CR. 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
IS 270 E is a 61-year-old bridge located S 3069 T 46 N R 5 E in St. Louis County, Missouri. The bridge carries IS 270 E over Up RR Fee Fee CR with 10 traffic lanes, handling approximately 138K vehicles per day. Built in 1965 and reconstructed in 1984, the structure spans 100.3 meters.
The bridge received a Condition Grade of B (69/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IS 270 E has a Condition Score of 69/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
IS 270 E was built in 1965 and reconstructed in 1984, making it 61 years old. The average bridge age in the United States is 48 years.
IS 270 E carries approximately 138K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 100.3 meters long and located on IS 270 E in S 3069 T 46 N R 5 E, St. Louis County, Missouri.
No, IS 270 E is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IS 270 E is located S 3069 T 46 N R 5 E in St. Louis County, Missouri. The bridge carries IS 270 E over Up RR Fee Fee CR. Its coordinates are 38.726178, -90.444811. It is maintained by State Highway Agency.
IS 270 E carries IS 270 E over Up RR Fee Fee CR. The bridge is 100.3 meters long and was built in 1965, with reconstruction in 1984.
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.