RS 644 59-6-8
Carrying RS 644 59-6-8 over TRIB. TO COWSKIN CREEK
2.1N OF BELLE PLAINE, Sumner, Kansas
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: RS 644 59-6-8
The RS 644 59-6-8 bridge in Sumner, Kansas carries RS 644 59-6-8 over TRIB. TO COWSKIN CREEK. It was built in 1986, making it 40 years old today. The structure is built primarily of steel continuous and spans 2 sections, stretching 16.9 meters (55 feet) end to end. Daily traffic averages 2,815 vehicles, placing it in the moderately-trafficked tier of Kansas bridges. It is owned and maintained by County Highway Agency.
The latest FHWA inspection records show a deck rating of 4/9, superstructure at 5/9, 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 11.1 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How RS 644 59-6-8 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 How the historical reference is calculated.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
- 1986
- Material
- Steel Continuous
- Number of Spans
- 2
- Structure Length
- 16.9 m (55 ft)
- Deck Width
- 8.0 m (26 ft)
- Owner
- County Highway Agency
- Avg Daily Traffic
- 2,815 vehicles/day
- Structure Number
- 000000000960570
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 4/9, the deck (driving surface) is in poor shape, with advanced wear flagged for priority repair.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
How to read this record
RS 644 59-6-8 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 RS 644 59-6-8 against other structures in Sumner 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 RS 644 59-6-8?
RS 644 59-6-8 in Sumner, Kansas has a deck rating of 4/9, superstructure rating of 5/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is RS 644 59-6-8 inspected?
RS 644 59-6-8'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 2,815 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. RS 644 59-6-8 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 RS 644 59-6-8?
RS 644 59-6-8 has an NBI inventory load rating of 11.1 metric tons.
Who is responsible for maintaining RS 644 59-6-8?
RS 644 59-6-8 is owned and maintained by County Highway Agency.
How old is RS 644 59-6-8 and does age affect safety?
RS 644 59-6-8 was built in 1986, making it 40 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.