US Bridges

SR A89 over Midgely/Wilson Canyon

Fair

Coconino County, Arizona · 1.6 MI E of JCT SR179 · Structure no. 00232

Built
1938
87 years old
Condition
Fair
inspected September 2023
Type
Arch - Deck
Steel
Length
374 ft
1 main span
Daily traffic
8,638
2022 count
Owner
State
State Highway Agency

About this bridge

SR A89 over Midgely/Wilson Canyon is a steel arch - deck carrying SR A89 over Midgely/Wilson Canyon in Coconino County, Arizona. It was built in 1938, so it is 87 years old, older than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 8,638 vehicles a day, roughly 5% of them trucks, projected to reach 8,648 by 2042. The structure is 374 ft (114 m) long and 27 ft wide. If it were closed, the detour would be 28 mi (45 km).

Location

Open in Google Maps
CarriesSR A89
CrossesMidgely/Wilson Canyon
Location1.6 MI E of JCT SR179
RouteState Highway 89
CountyCoconino County
StateArizona
Coordinates34.8851, -111.7429
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54 US tons
Inventory rating41 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+3 approach)
Design loadH 15
Structure length374 ft (114 m)
Longest span240 ft (73.2 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,638 (2022)
Projected traffic8,648 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed28 mi (45 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR A89 over Midgely/Wilson Canyon built?

It was built in 1938, making it 87 years old in 2025.

What condition is SR A89 over Midgely/Wilson Canyon in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does SR A89 over Midgely/Wilson Canyon carry?

About 8,638 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is SR A89 over Midgely/Wilson Canyon?

The structure is 374 ft (114 m) long with a longest span of 240 ft (73.2 m) and a deck 27 ft wide.

Who owns SR A89 over Midgely/Wilson Canyon?

It is owned by the State Highway Agency.