SH 146 NB
Carrying SH 146 NB over TAYLOR BAYOU
3.25 MI N OF NASA RD 1, Harris, Texas
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SH 146 NB
The SH 146 NB bridge in Harris, Texas carries SH 146 NB over TAYLOR BAYOU. It was built in 1969, making it 57 years old today. The structure is built primarily of concrete and spans 6 sections, stretching 73.2 meters (240 feet) end to end. Daily traffic averages 20,500 vehicles, placing it in the heavily-trafficked tier of Texas bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 5/9, superstructure at 4/9, substructure at 7/9. The weakest component sits in poor condition. A component scored 4 or below, placing this bridge in the federal Poor condition category rather than declaring it unsafe or closed. Its NBI inventory load rating is 36.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SH 146 NB compares
Live comparison across Texas.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 1969
- Material
- Concrete
- Number of Spans
- 6
- Structure Length
- 73.2 m (240 ft)
- Deck Width
- 18.6 m (61 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 20,500 vehicles/day
- Structure Number
- 121020038905058
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 5/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • At 4/9, the superstructure (beams and supports above the deck) is in poor shape, with advanced wear flagged for priority repair.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
SH 146 NB is in the federal Poor condition category. That is a component-based result, not a closure order.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Understand what Poor condition does and does not mean before drawing conclusions. Poor condition explained
- Compare SH 146 NB against other structures in Harris and across Texas. Texas bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for SH 146 NB?
SH 146 NB in Harris, Texas has a deck rating of 5/9, superstructure rating of 4/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is SH 146 NB inspected?
SH 146 NB's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 20,500 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SH 146 NB is currently shown as Poor condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SH 146 NB?
SH 146 NB has an NBI inventory load rating of 36.3 metric tons.
Who is responsible for maintaining SH 146 NB?
SH 146 NB is owned and maintained by State Highway Agency.
How old is SH 146 NB and does age affect safety?
SH 146 NB was built in 1969, making it 57 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.