US Bridges

Keystone Road over Wash

Good

Pima County, Arizona · 0.1 MI E JCT Houghton RD · Structure no. 10261

Built
1985
40 years old
Condition
Good
inspected November 2021
Type
Culvert
Concrete Continuous
Length
22 ft
2 main spans
Daily traffic
1,628
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Keystone Road over Wash is a concrete continuous culvert carrying Keystone Road over Wash in Pima County, Arizona. It was built in 1985, so it is 40 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 1,628 vehicles a day, projected to reach 1,638 by 2040. The structure is 22 ft (6.7 m) long and 60 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesKeystone Road
CrossesWash
Location0.1 MI E JCT Houghton RD
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.1691, -110.7703
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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum 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 length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width60 ft (18.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,628 (2020)
Projected traffic1,638 by 2040
Trucks0%
Lanes on structure2
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Keystone Road over Wash built?

It was built in 1985, making it 40 years old in 2025.

What condition is Keystone Road over 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 2021.

How much traffic does Keystone Road over Wash carry?

About 1,628 vehicles per day (2020 count).

How long is Keystone Road over Wash?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 60 ft wide.

Who owns Keystone Road over Wash?

It is owned by the City or Municipal Highway Agency.