6600 RD Mile 23
Carrying 6600 RD Mile 23 over DRUM CR. DRAINAGE
4.33 N. OF US-160, Montgomery, Kansas
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
6600 RD Mile 23 in Montgomery, Kansas is rated Fair in the FHWA's 2024 National Bridge Inventory.
Built in 1979, it carries 1 rated component on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. 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:000000000630395
INTERSTATE-ERA · STEEL · MULTI-SPAN · CULVERT-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- STEEL Steel
- MULTI-SPAN 3 spans
- CULVERT-LED Culvert-led
- LOCAL-ADT Local 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: 6600 RD Mile 23
The 6600 RD Mile 23 bridge in Montgomery, Kansas carries 6600 RD Mile 23 over DRUM CR. DRAINAGE. It was built in 1979, making it 47 years old today. The structure is built primarily of steel and spans 3 sections, stretching 8.8 meters (29 feet) end to end. Daily traffic averages 191 vehicles, placing it in the lower-traffic tier of Kansas bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show culvert at 5/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How 6600 RD Mile 23 compares
Age against the county: built in 1979, earlier than 136 of Montgomery's 326 bridges with a recorded construction year (42%), against a county median build year of 1975. 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).
6600 RD Mile 23 vs every rated Kansas bridge
Inventory load rating (metric tons), FHWA NBI, this state
24 Top 61% higher than 39% 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.
Montgomery inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 326 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
- 1979
- Material
- Steel
- Number of Spans
- 3
- Structure Length
- 8.8 m (29 ft) 0
- Owner
- County Highway Agency
- Avg Daily Traffic
- 191 vehicles/day
- Structure Number
- 000000000630395
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 6600 RD Mile 23 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 6600 RD Mile 23 against other structures in Montgomery 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 6600 RD Mile 23?
6600 RD Mile 23 in Montgomery, Kansas on the FHWA's 0–9 scale.
How often is 6600 RD Mile 23 inspected?
6600 RD Mile 23'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 191 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. 6600 RD Mile 23 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 6600 RD Mile 23?
6600 RD Mile 23 has an NBI inventory load rating of 23.5 metric tons.
Who is responsible for maintaining 6600 RD Mile 23?
6600 RD Mile 23 is owned and maintained by County Highway Agency.
How old is 6600 RD Mile 23 and does age affect safety?
6600 RD Mile 23 was built in 1979, making it 47 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.