US Bridges

Townsend-Winona RD over Walnut Canyon

Good

Coconino County, Arizona · 1.1 MI NW JCT I-40 · Structure no. 09904

Built
1989
36 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
107 ft
1 main span
Daily traffic
1,860
2024 count
Owner
County
County Highway Agency

About this bridge

Townsend-Winona RD over Walnut Canyon is a prestressed concrete stringer/multi-beam or girder carrying Townsend-Winona RD over Walnut Canyon in Coconino County, Arizona. It was built in 1989, so it is 36 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 1,860 vehicles a day, roughly 5% of them trucks, projected to reach 1,870 by 2042. The structure is 107 ft (32.6 m) long and 43 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesTownsend-Winona RD
CrossesWalnut Canyon
Location1.1 MI NW JCT I-40
RouteCounty Highway 0
StateArizona
Coordinates35.2116, -111.4216
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating40 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length107 ft (32.6 m)
Longest span104 ft (31.7 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,860 (2024)
Projected traffic1,870 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Townsend-Winona RD over Walnut Canyon built?

It was built in 1989, making it 36 years old in 2025.

What condition is Townsend-Winona RD over Walnut Canyon 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 July 2024.

How much traffic does Townsend-Winona RD over Walnut Canyon carry?

About 1,860 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Townsend-Winona RD over Walnut Canyon?

The structure is 107 ft (32.6 m) long with a longest span of 104 ft (31.7 m) and a deck 43 ft wide.

Who owns Townsend-Winona RD over Walnut Canyon?

It is owned by the County Highway Agency.