IS 270 E
IS 270 E in S 15 T 45 N R 5 E, St. Louis County, Missouri received a condition grade of B (74/100). Built in 1993, the bridge carries 199K vehicles daily on IS 270 E over Rp Is270e To Is64w Rp.
IS 270 E 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 1993, making it 33 years old — past the early-life period but still well within typical service life. Routine inspections and modest repair work are normal for bridges in this age band. IS 270 E carries an average daily traffic count of 199,283 vehicles, with 8 lane(s) crossing Rp Is270e To Is64w Rp. 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 33-year-old bridge located S 15 T 45 N R 5 E in St. Louis County, Missouri. The bridge carries IS 270 E over Rp Is270e To Is64w Rp with 8 traffic lanes, handling approximately 199K vehicles per day. Built in 1993, the structure spans 36 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 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 74/100 (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 1993, making it 33 years old. The average bridge age in the United States is 48 years.
IS 270 E carries approximately 199K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 36 meters long and located on IS 270 E in S 15 T 45 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 15 T 45 N R 5 E in St. Louis County, Missouri. The bridge carries IS 270 E over Rp Is270e To Is64w Rp. Its coordinates are 38.638681, -90.449667. It is maintained by State Highway Agency.
IS 270 E carries IS 270 E over Rp Is270e To Is64w Rp. The bridge is 36 meters long and was built in 1993.
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.