US Bridges

IRR SR 98 over Antelope Wash

Good

Coconino County, Arizona · 4.6 MI E JCT US 89 · Structure no. 01680

Built
1968
57 years old
Condition
Good
inspected September 2024
Type
Tee Beam
Concrete Continuous
Length
120 ft
1 main span
Daily traffic
9,255
2022 count
Owner
State
State Highway Agency

About this bridge

IRR SR 98 over Antelope Wash is a concrete continuous tee beam carrying IRR SR 98 over Antelope Wash in Coconino County, Arizona. It was built in 1968, so it is 57 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 9,255 vehicles a day, roughly 10% of them trucks, projected to reach 9,265 by 2042. The structure is 120 ft (36.6 m) long and 39 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesIRR SR 98
CrossesAntelope Wash
Location4.6 MI E JCT US 89
RouteState Highway 98
CountyCoconino County
StateArizona
Coordinates36.89821, -111.41031
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span80 ft (24.4 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,255 (2022)
Projected traffic9,265 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 IRR SR 98 over Antelope Wash built?

It was built in 1968, making it 57 years old in 2025.

What condition is IRR SR 98 over Antelope 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 September 2024.

How much traffic does IRR SR 98 over Antelope Wash carry?

About 9,255 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is IRR SR 98 over Antelope Wash?

The structure is 120 ft (36.6 m) long with a longest span of 80 ft (24.4 m) and a deck 39 ft wide.

Who owns IRR SR 98 over Antelope Wash?

It is owned by the State Highway Agency.