US Bridges

Twin Peaks Road over Santa Cruz River

Good

Pima County, Arizona · 0.5 Mile West of I-10 · Structure no. 10625

Built
2013
12 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
723 ft
6 main spans
Daily traffic
43,726
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Twin Peaks Road over Santa Cruz River is a prestressed concrete continuous stringer/multi-beam or girder carrying Twin Peaks Road over Santa Cruz River in Pima County, Arizona. It was built in 2013, so it is 12 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 43,726 vehicles a day, roughly 12% of them trucks, projected to reach 43,736 by 2042. The structure is 723 ft (220.4 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesTwin Peaks Road
CrossesSanta Cruz River
Location0.5 Mile West of I-10
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.3763, -111.1142
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length723 ft (220.4 m)
Longest span120 ft (36.6 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43,726 (2022)
Projected traffic43,736 by 2042
Trucks12%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$2,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Twin Peaks Road over Santa Cruz River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Twin Peaks Road over Santa Cruz River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.

How much traffic does Twin Peaks Road over Santa Cruz River carry?

About 43,726 vehicles per day (2022 count), of which roughly 12% are trucks.

How long is Twin Peaks Road over Santa Cruz River?

The structure is 723 ft (220.4 m) long with a longest span of 120 ft (36.6 m) and a deck 41 ft wide.

Who owns Twin Peaks Road over Santa Cruz River?

It is owned by the Town or Township Highway Agency.