US Bridges

IRR SR 85; FAP 075 over Alamo Wash

Fair

Pima County, Arizona · 65.4 MI S JCT SR B 8 · Structure no. 01059

Built
1961
64 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete Continuous
Length
171 ft
6 main spans
Daily traffic
1,498
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 85; FAP 075 over Alamo Wash is a concrete continuous slab carrying IRR SR 85; FAP 075 over Alamo Wash in Pima County, Arizona. It was built in 1961, so it is 64 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 1,498 vehicles a day, roughly 3% of them trucks, projected to reach 1,508 by 2042. The structure is 171 ft (52.1 m) long and 35 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesIRR SR 85; FAP 075
CrossesAlamo Wash
Location65.4 MI S JCT SR B 8
RouteState Highway 85
CountyPima County
StateArizona
Coordinates32.0911, -112.7749
Functional classRural Minor Arterial

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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
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 rating44 US tons
Inventory rating26 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span30 ft (9.1 m)
Deck width35 ft (10.7 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,498 (2022)
Projected traffic1,508 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 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 IRR SR 85; FAP 075 over Alamo Wash built?

It was built in 1961, making it 64 years old in 2025.

What condition is IRR SR 85; FAP 075 over Alamo 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 IRR SR 85; FAP 075 over Alamo Wash carry?

About 1,498 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is IRR SR 85; FAP 075 over Alamo Wash?

The structure is 171 ft (52.1 m) long with a longest span of 30 ft (9.1 m) and a deck 35 ft wide.

Who owns IRR SR 85; FAP 075 over Alamo Wash?

It is owned by the State Highway Agency.