K99 HWY
Carrying K99 HWY over ELM CREEK
4.12 MI N US56, Lyon, Kansas
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
K99 HWY in Lyon, Kansas sits above 80% of rated Kansas bridges on inventory load rating (41 t), while its 2007 build year is earlier than 12% of Lyon's recorded-year cohort (492 bridges).
K99 HWY in Lyon, Kansas is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 2007, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 8. The lowest applicable rating sets the federal condition category, so this Good 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:999909900561561
POST-2000 · STEEL · MULTI-SPAN · TIED-CTRL · LOCAL-ADT · HEAVY-LOAD · CAT-GOOD
- POST-2000 2000+
- STEEL Steel
- MULTI-SPAN 3 spans
- TIED-CTRL Tied control
- LOCAL-ADT Local ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
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: K99 HWY
The K99 HWY bridge in Lyon, Kansas carries K99 HWY over ELM CREEK. It was built in 2007, making it 19 years old today. The structure is built primarily of steel continuous and spans 3 sections, stretching 62.0 meters (203 feet) end to end. Daily traffic averages 360 vehicles, placing it in the lower-traffic tier of Kansas bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 8/9, superstructure at 8/9, substructure at 8/9. The weakest component sits in good condition. All reported major components score above the Poor range.
How K99 HWY compares
Age against the county: built in 2007, earlier than 58 of Lyon's 492 bridges with a recorded construction year (12%), against a county median build year of 1974. This is one of the newer structures in its county.
Live comparison across Kansas bridges with a recorded inventory load rating (24,893 of 24,894 rated).
K99 HWY vs every rated Kansas bridge
Inventory load rating (metric tons), FHWA NBI, this state
41 Top 20% higher than 80% 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.
Lyon inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 492 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
- 2007
- Material
- Steel Continuous
- Number of Spans
- 3
- Structure Length
- 62.0 m (203 ft)
- Deck Width
- 11.6 m (38 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 360 vehicles/day
- Structure Number
- 999909900561561
Condition Analysis
- • At 8/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates good at 8/9, with no significant deterioration on file.
- • The substructure (piers and abutments) is in good condition (8/9), showing no significant deterioration.
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 K99 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 K99 HWY against other structures in Lyon 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 K99 HWY?
K99 HWY in Lyon, Kansas has a deck rating of 8/9, superstructure rating of 8/9, and substructure rating of 8/9 on the FHWA's 0–9 scale.
How often is K99 HWY inspected?
K99 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 360 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. K99 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 K99 HWY?
K99 HWY has an NBI inventory load rating of 40.5 metric tons.
Who is responsible for maintaining K99 HWY?
K99 HWY is owned and maintained by State Highway Agency.
How old is K99 HWY and does age affect safety?
K99 HWY was built in 2007, making it 19 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.