US Bridges

Old Nogales HWY over Small Wash

Fair

Pima County, Arizona · 1.4 MI S JCT Nogales HWY · Structure no. 08306

Built
1900
125 years old, rebuilt 1938
Condition
Fair
inspected August 2023
Type
Tee Beam
Concrete
Length
95 ft
3 main spans
Daily traffic
6,995
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Old Nogales HWY over Small Wash is a concrete tee beam carrying Old Nogales HWY over Small Wash in Pima County, Arizona. It was built in 1900 and reconstructed in 1938, so it is 125 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 6,995 vehicles a day, roughly 5% of them trucks, projected to reach 7,005 by 2042. The structure is 95 ft (29 m) long and 38 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesOld Nogales HWY
CrossesSmall Wash
Location1.4 MI S JCT Nogales HWY
RouteCity Street 0
CountyPima County
StateArizona
Coordinates31.9072, -110.9609
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating25 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length95 ft (29 m)
Longest span32 ft (9.8 m)
Deck width38 ft (11.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,995 (2023)
Projected traffic7,005 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Nogales HWY over Small Wash built?

It was built in 1900, making it 125 years old in 2025. It was reconstructed in 1938.

What condition is Old Nogales HWY over Small Wash 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 August 2023.

How much traffic does Old Nogales HWY over Small Wash carry?

About 6,995 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Old Nogales HWY over Small Wash?

The structure is 95 ft (29 m) long with a longest span of 32 ft (9.8 m) and a deck 38 ft wide.

Who owns Old Nogales HWY over Small Wash?

It is owned by the Town or Township Highway Agency.