US Bridges

IRR BIA RTE N13 over Shiprock Wash

Good

San Juan County, New Mexico · 9 MI W & 10 MI S Shiprock · Structure no. 00000000000N234

Built
1976
49 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete Continuous
Length
31 ft
3 main spans
Daily traffic
1,675
2022 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE N13 over Shiprock Wash is a concrete continuous culvert carrying IRR BIA RTE N13 over Shiprock Wash in San Juan County, New Mexico. It was built in 1976, so it is 49 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 1,675 vehicles a day, roughly 20% of them trucks, projected to reach 1,964 by 2040. The structure is 31 ft (9.5 m) long and 45 ft wide. If it were closed, the detour would be 49.7 mi (80 km).

CarriesIRR BIA RTE N13
CrossesShiprock Wash
Location9 MI W & 10 MI S Shiprock
RouteFederal Lands Road 0N13
Coordinates36.62186, -108.87347
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating35.9 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadHS 20
Structure length31 ft (9.5 m)
Longest span10 ft (3.1 m)
Deck width45 ft (13.7 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,675 (2022)
Projected traffic1,964 by 2040
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.7 mi (80 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 N13 over Shiprock Wash built?

It was built in 1976, making it 49 years old in 2025.

What condition is IRR BIA RTE N13 over Shiprock 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 June 2024.

How much traffic does IRR BIA RTE N13 over Shiprock Wash carry?

About 1,675 vehicles per day (2022 count), of which roughly 20% are trucks.

How long is IRR BIA RTE N13 over Shiprock Wash?

The structure is 31 ft (9.5 m) long with a longest span of 10 ft (3.1 m) and a deck 45 ft wide.

Who owns IRR BIA RTE N13 over Shiprock Wash?

It is owned by the Bureau of Indian Affairs.