TRAIL Z50 & Z53
Carrying TRAIL Z50 & Z53 over BRANCH OF FARNUM CREEK
836-383, Riley, Kansas
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
TRAIL Z50 & Z53 in Riley, Kansas sits above 44% of rated Kansas bridges on inventory load rating (25 t), while its 1968 build year is earlier than 57% of Riley's recorded-year cohort (224 bridges).
TRAIL Z50 & Z53 in Riley, Kansas is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1968, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 6. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure KS:DAPFORRIL000906
INTERSTATE-ERA · STEEL · SINGLE-SPAN · TIED-CTRL · TRACE-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- SINGLE-SPAN Single span
- TIED-CTRL Tied control
- TRACE-ADT Trace ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: TRAIL Z50 & Z53
The TRAIL Z50 & Z53 bridge in Riley, Kansas carries TRAIL Z50 & Z53 over BRANCH OF FARNUM CREEK. It was built in 1968, making it 58 years old today. The structure is built primarily of steel and spans 1 section, stretching 10.2 meters (33 feet) end to end. Daily traffic averages 10 vehicles, placing it in the lower-traffic tier of Kansas bridges. It is owned and maintained by NASA.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 6/9. The weakest component sits in fair condition. All reported major components score above the Poor range.
How TRAIL Z50 & Z53 compares
Age against the county: built in 1968, earlier than 128 of Riley's 224 bridges with a recorded construction year (57%), against a county median build year of 1978. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Kansas bridges with a recorded inventory load rating (24,893 of 24,894 rated).
TRAIL Z50 & Z53 vs every rated Kansas bridge
Inventory load rating (metric tons), FHWA NBI, this state
25 Top 56% higher than 44% of 24,893 bridges
rated Kansas bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Riley inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 224 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1968
- Material
- Steel
- Number of Spans
- 1
- Structure Length
- 10.2 m (33 ft)
- Deck Width
- 6.9 m (23 ft)
- Owner
- NASA
- Avg Daily Traffic
- 10 vehicles/day
- Structure Number
- DAPFORRIL000906
Condition Analysis
- • The deck (driving surface) rates fair at 6/9, minor deterioration that routine maintenance should address.
- • The superstructure (beams and supports above the deck) is in fair condition (6/9), with minor deterioration that may require routine maintenance.
- • At 6/9, the substructure (piers and abutments) shows fair condition, with minor wear flagged for upkeep.
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 TRAIL Z50 & Z53 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 TRAIL Z50 & Z53 against other structures in Riley 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 TRAIL Z50 & Z53?
TRAIL Z50 & Z53 in Riley, Kansas has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is TRAIL Z50 & Z53 inspected?
TRAIL Z50 & Z53'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 10 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. TRAIL Z50 & Z53 is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for TRAIL Z50 & Z53?
TRAIL Z50 & Z53 has an NBI inventory load rating of 24.6 metric tons.
Who is responsible for maintaining TRAIL Z50 & Z53?
TRAIL Z50 & Z53 is owned and maintained by NASA.
How old is TRAIL Z50 & Z53 and does age affect safety?
TRAIL Z50 & Z53 was built in 1968, making it 58 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.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.