Old SB40 (Rte 66)
Carrying Old SB40 (Rte 66) over Johnson Wash
0.3 mi E Jct I40/Beale St, Mohave, Arizona
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
Old SB40 (Rte 66) in Mohave, Arizona sits above 11% of rated Arizona bridges on inventory load rating (30 t), while its 1939 build year is earlier than 89% of Mohave's recorded-year cohort (641 bridges).
Old SB40 (Rte 66) in Mohave, Arizona is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1939, 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:00220
PRE-1950 · CONCRETE · LONG-SPAN-RUN · TIED-CTRL · ARTERIAL-ADT · STANDARD-LOAD · CAT-FAIR
- PRE-1950 Pre-1950
- CONCRETE Concrete
- LONG-SPAN-RUN 4 spans
- TIED-CTRL Tied control
- ARTERIAL-ADT Arterial 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: Old SB40 (Rte 66)
The Old SB40 (Rte 66) bridge in Mohave, Arizona carries Old SB40 (Rte 66) over Johnson Wash. It was built in 1939, making it 87 years old today. It was last reconstructed in 1959, extending its service life. The structure is built primarily of concrete continuous and spans 4 sections, stretching 30.8 meters (101 feet) end to end. Daily traffic averages 2,979 vehicles, placing it in the moderately-trafficked tier of Arizona bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 6/9, superstructure at 6/9, substructure at 7/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How Old SB40 (Rte 66) compares
Age against the county: built in 1939, earlier than 570 of Mohave's 641 bridges with a recorded construction year (89%), against a county median build year of 1973. Age is not a defect on its own, but it is the population from which future Poor ratings are drawn.
Live comparison across Arizona bridges with a recorded inventory load rating (8,572 of 8,573 rated).
Old SB40 (Rte 66) vs every rated Arizona bridge
Inventory load rating (metric tons), FHWA NBI, this state
30 Top 89% higher than 11% 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.
Mohave inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 641 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
- 1939
- Last Reconstructed
- 1959
- Material
- Concrete Continuous
- Number of Spans
- 4
- Structure Length
- 30.8 m (101 ft)
- Deck Width
- 23.2 m (76 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 2,979 vehicles/day
- Structure Number
- 00220
Condition Analysis
- • At 6/9, the deck (driving surface) shows fair condition, with minor wear flagged for upkeep.
- • At 6/9, the superstructure (beams and supports above the deck) shows fair condition, with minor wear flagged for upkeep.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
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 Old SB40 (Rte 66) 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 Old SB40 (Rte 66) against other structures in Mohave 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 Old SB40 (Rte 66)?
Old SB40 (Rte 66) in Mohave, Arizona has a deck rating of 6/9, superstructure rating of 6/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is Old SB40 (Rte 66) inspected?
Old SB40 (Rte 66)'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 2,979 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. Old SB40 (Rte 66) 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 Old SB40 (Rte 66)?
Old SB40 (Rte 66) has an NBI inventory load rating of 29.9 metric tons.
Who is responsible for maintaining Old SB40 (Rte 66)?
Old SB40 (Rte 66) is owned and maintained by State Highway Agency.
How old is Old SB40 (Rte 66) and does age affect safety?
Old SB40 (Rte 66) was built in 1939, making it 87 years old and last reconstructed in 1959.
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.