US Bridges

IRR I 19; SB Ramp over Santa Cruz River

Fair

Pima County, Arizona · 6.0 MI S of JCT I-10 · Structure no. 01547

Built
1956
69 years old, rebuilt 1986
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
461 ft
9 main spans
Daily traffic
6,243
2021 count
Owner
State
State Highway Agency

About this bridge

IRR I 19; SB Ramp over Santa Cruz River is a steel continuous stringer/multi-beam or girder carrying IRR I 19; SB Ramp over Santa Cruz River in Pima County, Arizona. It was built in 1956 and reconstructed in 1986, so it is 69 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 6,243 vehicles a day, roughly 5% of them trucks, projected to reach 6,253 by 2041. The structure is 461 ft (140.5 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesIRR I 19; SB Ramp
CrossesSanta Cruz River
Location6.0 MI S of JCT I-10
RouteInterstate 19
CountyPima County
StateArizona
Coordinates32.1051, -110.9953
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadHS 15
Structure length461 ft (140.5 m)
Longest span54 ft (16.5 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,243 (2021)
Projected traffic6,253 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$2,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR I 19; SB Ramp over Santa Cruz River built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.

What condition is IRR I 19; SB Ramp over Santa Cruz River 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 IRR I 19; SB Ramp over Santa Cruz River carry?

About 6,243 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is IRR I 19; SB Ramp over Santa Cruz River?

The structure is 461 ft (140.5 m) long with a longest span of 54 ft (16.5 m) and a deck 31 ft wide.

Who owns IRR I 19; SB Ramp over Santa Cruz River?

It is owned by the State Highway Agency.