US Bridges

SS40 Spur over BNSF Railroad

Fair

Navajo County, Arizona · 1.3 MI W JCT B40 · Structure no. 01829

Built
1975
50 years old, rebuilt 2019
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
187 ft
3 main spans
Daily traffic
947
2020 count
Owner
State
State Highway Agency

About this bridge

SS40 Spur over BNSF Railroad is a prestressed concrete stringer/multi-beam or girder carrying SS40 Spur over BNSF Railroad in Navajo County, Arizona. It was built in 1975 and reconstructed in 2019, so it is 50 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 947 vehicles a day, roughly 10% of them trucks, projected to reach 957 by 2040. The structure is 187 ft (57 m) long and 52 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSS40 Spur
CrossesBNSF Railroad
Location1.3 MI W JCT B40
RouteState Highway 40
CountyNavajo County
StateArizona
Coordinates35.03952, -110.74469
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length187 ft (57 m)
Longest span81 ft (24.7 m)
Deck width52 ft (16 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic947 (2020)
Projected traffic957 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SS40 Spur over BNSF Railroad built?

It was built in 1975, making it 50 years old in 2025. It was reconstructed in 2019.

What condition is SS40 Spur over BNSF Railroad in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does SS40 Spur over BNSF Railroad carry?

About 947 vehicles per day (2020 count), of which roughly 10% are trucks.

How long is SS40 Spur over BNSF Railroad?

The structure is 187 ft (57 m) long with a longest span of 81 ft (24.7 m) and a deck 52 ft wide.

Who owns SS40 Spur over BNSF Railroad?

It is owned by the State Highway Agency.