SS40 SPUR
Carrying SS40 SPUR over BNSF Railroad
1.3 mi W Jct B40, Navajo, Arizona
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
SS40 SPUR in Navajo, Arizona sits above 34% of rated Arizona bridges on inventory load rating (34 t), while its 1975 build year is earlier than 43% of Navajo's recorded-year cohort (277 bridges).
SS40 SPUR in Navajo, Arizona is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1975, 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 AZ:01829
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · SUB-LED · LOCAL-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- SUB-LED Substructure-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: SS40 SPUR
The SS40 SPUR bridge in Navajo, Arizona carries SS40 SPUR over BNSF Railroad. It was built in 1975, making it 51 years old today. It was last reconstructed in 2019, extending its service life. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 57.0 meters (187 feet) end to end. Daily traffic averages 947 vehicles, placing it in the lower-traffic tier of Arizona bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 6/9. The weakest component sits in fair condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How SS40 SPUR compares
Age against the county: built in 1975, earlier than 120 of Navajo's 277 bridges with a recorded construction year (43%), against a county median build year of 1972. This is one of the newer structures in its county.
Live comparison across Arizona bridges with a recorded inventory load rating (8,572 of 8,573 rated).
SS40 SPUR vs every rated Arizona bridge
Inventory load rating (metric tons), FHWA NBI, this state
34 Top 66% higher than 34% of 8,572 bridges
rated Arizona 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.
Navajo inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 277 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
- 1975
- Last Reconstructed
- 2019
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 57.0 m (187 ft)
- Deck Width
- 16.0 m (52 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 947 vehicles/day
- Structure Number
- 01829
Condition Analysis
- • The deck (driving surface) is in good condition (7/9), showing no significant deterioration.
- • The superstructure (beams and supports above the deck) rates good at 7/9, with no significant deterioration on file.
- • The substructure (piers and abutments) rates fair at 6/9, minor deterioration that routine maintenance should address.
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 SS40 SPUR 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 SS40 SPUR against other structures in Navajo and across Arizona. Arizona 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 SS40 SPUR?
SS40 SPUR in Navajo, Arizona has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 6/9 on the FHWA's 0–9 scale.
How often is SS40 SPUR inspected?
SS40 SPUR'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 947 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SS40 SPUR 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 SS40 SPUR?
SS40 SPUR has an NBI inventory load rating of 33.6 metric tons.
Who is responsible for maintaining SS40 SPUR?
SS40 SPUR is owned and maintained by State Highway Agency.
How old is SS40 SPUR and does age affect safety?
SS40 SPUR was built in 1975, making it 51 years old and last reconstructed in 2019.
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.