IS 35 S
IS 35 S in S 7 T 49 N R 34 W, Jackson County, Missouri received a condition grade of C (55/100). Built in 1946, the bridge carries 148K vehicles daily on IS 35 S over Cst W 20th ST Cst AVE.
IS 35 S carries a C on the BridgeSafety Condition Score with 55/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1946, making it 80 years old — well beyond the typical 50-year design life of bridges constructed in that era. Bridges of this vintage usually need substantial rehabilitation or replacement once their original components have aged out, regardless of current condition ratings. IS 35 S carries an average daily traffic count of 147,773 vehicles, with 8 lane(s) crossing Cst W 20th ST Cst AVE. 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 35 S is a 80-year-old bridge located S 7 T 49 N R 34 W in Jackson County, Missouri. The bridge carries IS 35 S over Cst W 20th ST Cst AVE with 8 traffic lanes, handling approximately 148K vehicles per day. Built in 1946 and reconstructed in 2013, the structure spans 899.8 meters.
The bridge received a Condition Grade of C (55/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 5/9 (fair), and substructure 7/9 (good).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IS 35 S has a Condition Score of 55/100 (Grade C). Its deck is rated 7/9, superstructure 5/9, and substructure 7/9 on the NBI scale. The bridge is not classified as structurally deficient.
IS 35 S was built in 1946 and reconstructed in 2013, making it 80 years old. The average bridge age in the United States is 48 years.
IS 35 S carries approximately 148K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 899.8 meters long and located on IS 35 S in S 7 T 49 N R 34 W, Jackson County, Missouri.
No, IS 35 S 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 35 S is located S 7 T 49 N R 34 W in Jackson County, Missouri. The bridge carries IS 35 S over Cst W 20th ST Cst AVE. Its coordinates are 39.085953, -94.592358. It is maintained by State Highway Agency.
IS 35 S carries IS 35 S over Cst W 20th ST Cst AVE. The bridge is 899.8 meters long and was built in 1946, with reconstruction in 2013.
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.