US Bridges

Arivaca Road over Small Wash

Good

Pima County, Arizona · 9.1 MI SW I 19 · Structure no. 09798

Built
1981
44 years old
Condition
Good
inspected November 2023
Type
Culvert
Concrete Continuous
Length
21 ft
2 main spans
Daily traffic
1,455
2021 count
Owner
County
County Highway Agency

About this bridge

Arivaca Road over Small Wash is a concrete continuous culvert carrying Arivaca Road over Small Wash in Pima County, Arizona. It was built in 1981, so it is 44 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 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 1,455 vehicles a day, roughly 10% of them trucks, projected to reach 1,465 by 2041. The structure is 21 ft (6.4 m) long and 74 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesArivaca Road
CrossesSmall Wash
Location9.1 MI SW I 19
RouteCounty Highway 631
CountyPima County
StateArizona
Coordinates31.68751, -111.20636
Functional classRural Major Collector

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width74 ft (22.7 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,455 (2021)
Projected traffic1,465 by 2041
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Arivaca Road over Small Wash built?

It was built in 1981, making it 44 years old in 2025.

What condition is Arivaca Road over Small Wash 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 November 2023.

How much traffic does Arivaca Road over Small Wash carry?

About 1,455 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is Arivaca Road over Small Wash?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m) and a deck 74 ft wide.

Who owns Arivaca Road over Small Wash?

It is owned by the County Highway Agency.