US50/US400 HWY
Carrying US50/US400 HWY over ARKANSAS RIVER DRAINAGE
3.28 MI E K23, Gray, Kansas
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: US50/US400 HWY
The US50/US400 HWY bridge in Gray, Kansas carries US50/US400 HWY over ARKANSAS RIVER DRAINAGE. It was built in 1937, making it 89 years old today. It was last reconstructed in 1970, extending its service life. The structure is built primarily of concrete and spans 3 sections, stretching 8.3 meters (27 feet) end to end. Daily traffic averages 6,550 vehicles, placing it in the moderately-trafficked tier of Kansas bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show culvert at 7/9. The weakest component sits in good condition. None of this bridge's reported major components fall into the Poor condition range. Its NBI inventory load rating is 26.3 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How US50/US400 HWY compares
Live comparison across Kansas.
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 How the historical reference is calculated.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
- 1937
- Last Reconstructed
- 1970
- Material
- Concrete
- Number of Spans
- 3
- Structure Length
- 8.3 m (27 ft)
- Deck Width
- 36.1 m (118 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 6,550 vehicles/day
- Structure Number
- 999905000350141
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether US50/US400 HWY is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare US50/US400 HWY against other structures in Gray and across Kansas. Kansas 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 US50/US400 HWY?
US50/US400 HWY in Gray, Kansas on the FHWA's 0–9 scale.
How often is US50/US400 HWY inspected?
US50/US400 HWY'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 6,550 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. US50/US400 HWY is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for US50/US400 HWY?
US50/US400 HWY has an NBI inventory load rating of 26.3 metric tons.
Who is responsible for maintaining US50/US400 HWY?
US50/US400 HWY is owned and maintained by State Highway Agency.
How old is US50/US400 HWY and does age affect safety?
US50/US400 HWY was built in 1937, making it 89 years old and last reconstructed in 1970.
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.