US Bridges

IRR BIA RTE N9 over Standing Rock Wash

Good

McKinley County, New Mexico · 1 MI SW of Standing Rock · Structure no. 00000000000N490

Built
1992
33 years old
Condition
Good
inspected March 2023
Type
Culvert
Steel
Length
26 ft
1 main span
Daily traffic
1,760
2021 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N9 over Standing Rock Wash is a steel culvert carrying IRR BIA RTE N9 over Standing Rock Wash in McKinley County, New Mexico. It was built in 1992, so it is 33 years old, younger than the New Mexico average of 51.5 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 1,760 vehicles a day, roughly 10% of them trucks, projected to reach 2,059 by 2039. The structure is 26 ft (8 m) long and 140 ft wide. If it were closed, the detour would be 55.9 mi (90 km).

CarriesIRR BIA RTE N9
CrossesStanding Rock Wash
Location1 MI SW of Standing Rock
RouteFederal Lands Road 0N9
Coordinates35.79875, -108.37072
Functional classRural Major Collector

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (8 m)
Longest span26 ft (8 m)
Deck width140 ft (42.6 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,760 (2021)
Projected traffic2,059 by 2039
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed55.9 mi (90 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
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 BIA RTE N9 over Standing Rock Wash built?

It was built in 1992, making it 33 years old in 2025.

What condition is IRR BIA RTE N9 over Standing Rock 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 March 2023.

How much traffic does IRR BIA RTE N9 over Standing Rock Wash carry?

About 1,760 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is IRR BIA RTE N9 over Standing Rock Wash?

The structure is 26 ft (8 m) long with a longest span of 26 ft (8 m) and a deck 140 ft wide.

Who owns IRR BIA RTE N9 over Standing Rock Wash?

It is owned by the Bureau of Indian Affairs.