US Bridges

Twin Peaks Road over Wash

Good

Pima County, Arizona · 0.50 MI E Silverbell RD · Structure no. 10028

Built
1988
37 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
8,000
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Twin Peaks Road over Wash is a concrete continuous culvert carrying Twin Peaks Road over Wash in Pima County, Arizona. It was built in 1988, so it is 37 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 8,000 vehicles a day, roughly 5% of them trucks, projected to reach 8,010 by 2040. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

No coordinates are recorded for this structure.

CarriesTwin Peaks Road
CrossesWash
Location0.50 MI E Silverbell RD
RouteCity Street 0
StateArizona
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 inspectionMay 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2024)
Projected traffic8,010 by 2040
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Twin Peaks Road over Wash built?

It was built in 1988, making it 37 years old in 2025.

What condition is Twin Peaks 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 May 2024.

How much traffic does Twin Peaks Road over Wash carry?

About 8,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Twin Peaks Road over Wash?

The structure is 32 ft (9.8 m) long with a longest span of 10 ft (3 m).

Who owns Twin Peaks Road over Wash?

It is owned by the Town or Township Highway Agency.