US Bridges

Kenyon over Robb Wash

Good

Pima County, Arizona · 0.1 MI W Camino Seco · Structure no. 08452

Built
1965
60 years old
Condition
Good
inspected December 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
2,074
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Kenyon over Robb Wash is a concrete continuous culvert carrying Kenyon over Robb Wash in Pima County, Arizona. It was built in 1965, so it is 60 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 2,074 vehicles a day, roughly 5% of them trucks, projected to reach 2,084 by 2042. The structure is 24 ft (7.3 m) long and 84 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesKenyon
CrossesRobb Wash
Location0.1 MI W Camino Seco
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.21364, -110.80833
Functional classUrban 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 inspectionDecember 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length24 ft (7.3 m)
Longest span10 ft (3 m)
Deck width84 ft (25.6 m)
Roadway width70 ft (21.3 m)
Vertical clearance over deck20 ft (6.1 m)

Traffic and service

Average daily traffic2,074 (2022)
Projected traffic2,084 by 2042
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Kenyon over Robb Wash built?

It was built in 1965, making it 60 years old in 2025.

What condition is Kenyon over Robb 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 December 2023.

How much traffic does Kenyon over Robb Wash carry?

About 2,074 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Kenyon over Robb Wash?

The structure is 24 ft (7.3 m) long with a longest span of 10 ft (3 m) and a deck 84 ft wide.

Who owns Kenyon over Robb Wash?

It is owned by the City or Municipal Highway Agency.