US Bridges

5th ST over Robb Wash

Fair

Pima County, Arizona · 100 Ft W JCT Sarnoff DR · Structure no. 08449

Built
1964
61 years old
Condition
Fair
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
2 main spans
Daily traffic
1,519
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

5th ST over Robb Wash is a prestressed concrete box beam or girders - multiple carrying 5th ST over Robb Wash in Pima County, Arizona. It was built in 1964, so it is 61 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 5 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 1,519 vehicles a day, roughly 5% of them trucks, projected to reach 1,529 by 2042. The structure is 60 ft (18.3 m) long and 40 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries5th ST
CrossesRobb Wash
Location100 Ft W JCT Sarnoff DR
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2269, -110.8167
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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 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 rating41 US tons
Inventory rating25 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span29 ft (8.8 m)
Deck width40 ft (12.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck20 ft (6.1 m)

Traffic and service

Average daily traffic1,519 (2022)
Projected traffic1,529 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 5th ST over Robb Wash built?

It was built in 1964, making it 61 years old in 2025.

What condition is 5th ST over Robb 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 5th ST over Robb Wash carry?

About 1,519 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is 5th ST over Robb Wash?

The structure is 60 ft (18.3 m) long with a longest span of 29 ft (8.8 m) and a deck 40 ft wide.

Who owns 5th ST over Robb Wash?

It is owned by the City or Municipal Highway Agency.