US Bridges

SR 89A over Landon Spring

Good

Coconino County, Arizona · 4.7 MI S JCT I-40 · Structure no. 06998

Built
1994
31 years old
Condition
Good
inspected August 2021
Type
Culvert
Concrete Continuous
Length
32 ft
3 main spans
Daily traffic
3,858
2016 count
Owner
State
State Highway Agency

About this bridge

SR 89A over Landon Spring is a concrete continuous culvert carrying SR 89A over Landon Spring in Coconino County, Arizona. It was built in 1994, so it is 31 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 3,858 vehicles a day, roughly 9% of them trucks, projected to reach 3,868 by 2036. The structure is 32 ft (9.8 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesSR 89A
CrossesLandon Spring
Location4.7 MI S JCT I-40
RouteState Highway 89
CountyCoconino County
StateArizona
Coordinates35.1202, -111.7077
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
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionAugust 2021
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 alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating99 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 traffic3,858 (2016)
Projected traffic3,868 by 2036
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 89A over Landon Spring built?

It was built in 1994, making it 31 years old in 2025.

What condition is SR 89A over Landon Spring 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 August 2021.

How much traffic does SR 89A over Landon Spring carry?

About 3,858 vehicles per day (2016 count), of which roughly 9% are trucks.

How long is SR 89A over Landon Spring?

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

Who owns SR 89A over Landon Spring?

It is owned by the State Highway Agency.