US Bridges

I-40; Sfr over Ltl Lithodendron Wash

PoorPosted for load

Navajo County, Arizona · 7.9 MI E JCT SR 77 · Structure no. 02057

Built
1932
93 years old, rebuilt 1986
Condition
Poor
inspected June 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
343 ft
18 main spans
Daily traffic
60
2021 count
Owner
State
State Highway Agency

About this bridge

I-40; Sfr over Ltl Lithodendron Wash is a wood or timber stringer/multi-beam or girder carrying I-40; Sfr over Ltl Lithodendron Wash in Navajo County, Arizona. It was built in 1932 and reconstructed in 1986, so it is 93 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 60 vehicles a day, roughly 2% of them trucks, projected to reach 70 by 2041. The structure is 343 ft (104.5 m) long and 24 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-40; Sfr
CrossesLtl Lithodendron Wash
Location7.9 MI E JCT SR 77
RouteState Highway 40
CountyNavajo County
StateArizona
Coordinates34.9916, -109.9503
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39 US tons
Inventory rating29 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans18
Design loadH 15
Structure length343 ft (104.5 m)
Longest span19 ft (5.8 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2021)
Projected traffic70 by 2041
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-40; Sfr over Ltl Lithodendron Wash built?

It was built in 1932, making it 93 years old in 2025. It was reconstructed in 1986.

What condition is I-40; Sfr over Ltl Lithodendron Wash in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2023.

How much traffic does I-40; Sfr over Ltl Lithodendron Wash carry?

About 60 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is I-40; Sfr over Ltl Lithodendron Wash?

The structure is 343 ft (104.5 m) long with a longest span of 19 ft (5.8 m) and a deck 24 ft wide.

Who owns I-40; Sfr over Ltl Lithodendron Wash?

It is owned by the State Highway Agency.