US Bridges

SPRR over 6th Ave

Fair

Pima County, Arizona · 0.16 MI S of 6th Street · Structure no. 07988

Built
1929
96 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
42 ft
2 main spans
Daily traffic
60
2023 count
Owner
Railroad
Railroad

About this bridge

SPRR over 6th Ave is a concrete stringer/multi-beam or girder carrying SPRR over 6th Ave in Pima County, Arizona. It was built in 1929, so it is 96 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 60 vehicles a day, roughly 1% of them trucks, projected to reach 70 by 2042. The structure is 42 ft (12.8 m) long and 116 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSPRR
Crosses6th Ave
Location0.16 MI S of 6th Street
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2253, -110.9687
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating72 US tons
Inventory rating72 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadRailroad
Structure length42 ft (12.8 m)
Longest span12 ft (3.7 m)
Deck width116 ft (35.4 m)
Roadway width101 ft (30.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic70 by 2042
Trucks1%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and railroad
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerRailroad
Maintained byCity or Municipal Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SPRR over 6th Ave built?

It was built in 1929, making it 96 years old in 2025.

What condition is SPRR over 6th Ave 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 July 2023.

How much traffic does SPRR over 6th Ave carry?

About 60 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is SPRR over 6th Ave?

The structure is 42 ft (12.8 m) long with a longest span of 12 ft (3.7 m) and a deck 116 ft wide.

Who owns SPRR over 6th Ave?

It is owned by the Railroad and maintained by the City or Municipal Highway Agency.