IH 610
IH 610 in 1.50 MI N Of Sh 225, Harris County, Texas received a condition grade of C (58/100). Built in 1973, the bridge carries 137K vehicles daily on IH 610 over Houston Ship Channel.
IH 610 carries a C on the BridgeSafety Condition Score with 58/100. 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 1973 and is now 53 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. IH 610 carries an average daily traffic count of 136,576 vehicles, with 10 lane(s) crossing Houston Ship Channel. 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
IH 610 is a 53-year-old bridge located 1.50 MI N Of Sh 225 in Harris County, Texas. The bridge carries IH 610 over Houston Ship Channel with 10 traffic lanes, handling approximately 137K vehicles per day. Built in 1973, the structure spans 374.9 meters.
The bridge received a Condition Grade of C (58/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 5/9 (fair), and substructure 5/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
IH 610 has a Condition Score of 58/100 (Grade C). Its deck is rated 6/9, superstructure 5/9, and substructure 5/9 on the NBI scale. The bridge is not classified as structurally deficient.
IH 610 was built in 1973, making it 53 years old. The average bridge age in the United States is 48 years.
IH 610 carries approximately 137K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 374.9 meters long and located on IH 610 in 1.50 MI N Of Sh 225, Harris County, Texas.
No, IH 610 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
IH 610 is located 1.50 MI N Of Sh 225 in Harris County, Texas. The bridge carries IH 610 over Houston Ship Channel. Its coordinates are 29.725133, -95.266456. It is maintained by State Highway Agency.
IH 610 carries IH 610 over Houston Ship Channel. The bridge is 374.9 meters long and was built in 1973.
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.