IS 64 E
IS 64 E in S 21 T 45 N R 6 E, St. Louis County, Missouri received a condition grade of A (89/100). Built in 2008, the bridge carries 159K vehicles daily on IS 64 E over Metrolink.
IS 64 E carries an A on the BridgeSafety Condition Score with 89/100. Deck, superstructure, and substructure ratings all sit in the better tier of the FHWA NBI distribution. The bridge is structurally sound by federal standards.
The bridge was built in 2008 and is 18 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. IS 64 E carries an average daily traffic count of 158,962 vehicles, with 8 lane(s) crossing Metrolink. 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 64 E is a 18-year-old bridge located S 21 T 45 N R 6 E in St. Louis County, Missouri. The bridge carries IS 64 E over Metrolink with 8 traffic lanes, handling approximately 159K vehicles per day. Built in 2008, the structure spans 13 meters.
The bridge received a Condition Grade of A (89/100) based on Federal Highway Administration inspection data. Its deck is rated 8/9 (good), superstructure 8/9 (good), and substructure 8/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IS 64 E has a Condition Score of 89/100 (Grade A). Its deck is rated 8/9, superstructure 8/9, and substructure 8/9 on the NBI scale. The bridge is not classified as structurally deficient.
IS 64 E was built in 2008, making it 18 years old. The average bridge age in the United States is 48 years.
IS 64 E carries approximately 159K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 13 meters long and located on IS 64 E in S 21 T 45 N R 6 E, St. Louis County, Missouri.
No, IS 64 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 64 E is located S 21 T 45 N R 6 E in St. Louis County, Missouri. The bridge carries IS 64 E over Metrolink. Its coordinates are 38.629111, -90.338028. It is maintained by State Highway Agency.
IS 64 E carries IS 64 E over Metrolink. The bridge is 13 meters long and was built in 2008.
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.