US Bridges

Thornydale Road over Carmack Wash

Good

Pima County, Arizona · 0.25 MI N of Orange Grove · Structure no. 08726

Built
1983
42 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete Continuous
Length
109 ft
10 main spans
Daily traffic
33,891
2020 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Thornydale Road over Carmack Wash is a concrete continuous culvert carrying Thornydale Road over Carmack Wash in Pima County, Arizona. It was built in 1983, so it is 42 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 33,891 vehicles a day, roughly 5% of them trucks, projected to reach 33,901 by 2040. The structure is 109 ft (33.2 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesThornydale Road
CrossesCarmack Wash
Location0.25 MI N of Orange Grove
RouteCity Street 0
CountyPima County
StateArizona
Coordinates32.32689, -111.04603
Functional classUrban Other Principal 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 protection7 GoodSome minor problems.
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating89.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans10
Design loadHS 20
Structure length109 ft (33.2 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 traffic33,891 (2020)
Projected traffic33,901 by 2040
Trucks5%
Lanes on structure7
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

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 Thornydale Road over Carmack Wash built?

It was built in 1983, making it 42 years old in 2025.

What condition is Thornydale Road over Carmack 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 Thornydale Road over Carmack Wash carry?

About 33,891 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Thornydale Road over Carmack Wash?

The structure is 109 ft (33.2 m) long with a longest span of 10 ft (3 m).

Who owns Thornydale Road over Carmack Wash?

It is owned by the Town or Township Highway Agency.