IS 29 N
IS 29 N in S 28 T 1 N R 33 W, Platte County, Missouri received a condition grade of A (93/100). Built in 2021, the bridge carries 134K vehicles daily on IS 29 N over Cst NW 56th ST.
IS 29 N carries an A on the BridgeSafety Condition Score with 93/100. 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 2021 and is 5 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 29 N carries an average daily traffic count of 134,485 vehicles, with 4 lane(s) crossing Cst NW 56th ST. 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 29 N is a 5-year-old bridge located S 28 T 1 N R 33 W in Platte County, Missouri. The bridge carries IS 29 N over Cst NW 56th ST with 4 traffic lanes, handling approximately 134K vehicles per day. Built in 2021, the structure spans 21.8 meters.
The bridge received a Condition Grade of A (93/100) based on Federal Highway Administration inspection data. Its deck is rated 8/9 (good), superstructure 8/9 (good), and substructure 9/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IS 29 N has a Condition Score of 93/100 (Grade A). Its deck is rated 8/9, superstructure 8/9, and substructure 9/9 on the NBI scale. The bridge is not classified as structurally deficient.
IS 29 N was built in 2021, making it 5 years old. The average bridge age in the United States is 48 years.
IS 29 N carries approximately 134K vehicles per day (average daily traffic). The bridge has 4 traffic lanes. It is 21.8 meters long and located on IS 29 N in S 28 T 1 N R 33 W, Platte County, Missouri.
No, IS 29 N 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 29 N is located S 28 T 1 N R 33 W in Platte County, Missouri. The bridge carries IS 29 N over Cst NW 56th ST. Its coordinates are 39.196411, -94.620639. It is maintained by State Highway Agency.
IS 29 N carries IS 29 N over Cst NW 56th ST. The bridge is 21.8 meters long and was built in 2021.
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.