US Bridges

Trico-Marana Road over Santa Cruz River

PoorPosted for load

Pima County, Arizona · 4.05 MI West of Rt 84 · Structure no. 09552

Built
1959
66 years old
Condition
Poor
inspected December 2023
Type
Tee Beam
Concrete
Length
358 ft
6 main spans
Daily traffic
2,718
2022 count
Owner
County
County Highway Agency

About this bridge

Trico-Marana Road over Santa Cruz River is a concrete tee beam carrying Trico-Marana Road over Santa Cruz River in Pima County, Arizona. It was built in 1959, so it is 66 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 2,718 vehicles a day, roughly 2% of them trucks, projected to reach 2,728 by 2042. The structure is 358 ft (109.1 m) long and 34 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesTrico-Marana Road
CrossesSanta Cruz River
Location4.05 MI West of Rt 84
RouteCounty Highway 0
CountyPima County
StateArizona
Coordinates32.4533, -111.2802
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating27 US tons
Inventory rating16 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length358 ft (109.1 m)
Longest span58 ft (17.7 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,718 (2022)
Projected traffic2,728 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Trico-Marana Road over Santa Cruz River built?

It was built in 1959, making it 66 years old in 2025.

What condition is Trico-Marana Road over Santa Cruz River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does Trico-Marana Road over Santa Cruz River carry?

About 2,718 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Trico-Marana Road over Santa Cruz River?

The structure is 358 ft (109.1 m) long with a longest span of 58 ft (17.7 m) and a deck 34 ft wide.

Who owns Trico-Marana Road over Santa Cruz River?

It is owned by the County Highway Agency.