US Bridges

N Mt Lemmon Short over Small Wash

FairPosted for load

Pima County, Arizona · Catalina Hwy-Mt Lemmon RD · Structure no. 08279

Built
1930
95 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete Continuous
Length
36 ft
2 main spans
Daily traffic
246
2022 count
Owner
County
County Highway Agency

About this bridge

N Mt Lemmon Short over Small Wash is a concrete continuous slab carrying N Mt Lemmon Short over Small Wash in Pima County, Arizona. It was built in 1930, so it is 95 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. Its operating status is: posted for load restriction.

It carries about 246 vehicles a day, projected to reach 256 by 2042. The structure is 36 ft (11 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesN Mt Lemmon Short
CrossesSmall Wash
LocationCatalina Hwy-Mt Lemmon RD
RouteCounty Highway 0
CountyPima County
StateArizona
Coordinates32.30349, -110.74477
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating26 US tons
Inventory rating15 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length36 ft (11 m)
Longest span16 ft (4.9 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic246 (2022)
Projected traffic256 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$1,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was N Mt Lemmon Short over Small Wash built?

It was built in 1930, making it 95 years old in 2025.

What condition is N Mt Lemmon Short 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 December 2023.

How much traffic does N Mt Lemmon Short over Small Wash carry?

About 246 vehicles per day (2022 count).

How long is N Mt Lemmon Short over Small Wash?

The structure is 36 ft (11 m) long with a longest span of 16 ft (4.9 m) and a deck 27 ft wide.

Who owns N Mt Lemmon Short over Small Wash?

It is owned by the County Highway Agency.