US Bridges

Swan Road over Arroyo Chico

Good

Pima County, Arizona · 0.4 MI S JCT Broadway Bl · Structure no. 09258

Built
1976
49 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
28,370
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Swan Road over Arroyo Chico is a concrete continuous culvert carrying Swan Road over Arroyo Chico in Pima County, Arizona. It was built in 1976, so it is 49 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 28,370 vehicles a day, roughly 5% of them trucks, projected to reach 28,380 by 2042. The structure is 21 ft (6.4 m) long and 100 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSwan Road
CrossesArroyo Chico
Location0.4 MI S JCT Broadway Bl
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.2163, -110.8923
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width100 ft (30.5 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,370 (2022)
Projected traffic28,380 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Swan Road over Arroyo Chico built?

It was built in 1976, making it 49 years old in 2025.

What condition is Swan Road over Arroyo Chico 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 March 2023.

How much traffic does Swan Road over Arroyo Chico carry?

About 28,370 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Swan Road over Arroyo Chico?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 100 ft wide.

Who owns Swan Road over Arroyo Chico?

It is owned by the City or Municipal Highway Agency.