US Bridges

IRR/US-64 over Shiprock Wash

Fair

San Juan County, New Mexico · 7.9 MI W of JCT US-491 · Structure no. 000000000005863

Built
1956
69 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
213 ft
3 main spans
Daily traffic
4,813
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/US-64 over Shiprock Wash is a steel continuous stringer/multi-beam or girder carrying IRR/US-64 over Shiprock Wash in San Juan County, New Mexico. It was built in 1956, so it is 69 years old, older than the New Mexico average of 51.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 4,813 vehicles a day, roughly 11% of them trucks, projected to reach 6,545 by 2043. The structure is 213 ft (64.9 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR/US-64
CrossesShiprock Wash
Location7.9 MI W of JCT US-491
RouteU.S. Route 64
CountySan Juan County
StateNew Mexico
Coordinates36.79218, -108.83354
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating54 US tons
Inventory rating32.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length213 ft (64.9 m)
Longest span81 ft (24.7 m)
Deck width34 ft (10.4 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,813 (2023)
Projected traffic6,545 by 2043
Trucks11%
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$524,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR/US-64 over Shiprock Wash built?

It was built in 1956, making it 69 years old in 2025.

What condition is IRR/US-64 over Shiprock Wash 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 May 2023.

How much traffic does IRR/US-64 over Shiprock Wash carry?

About 4,813 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is IRR/US-64 over Shiprock Wash?

The structure is 213 ft (64.9 m) long with a longest span of 81 ft (24.7 m) and a deck 34 ft wide.

Who owns IRR/US-64 over Shiprock Wash?

It is owned by the State Highway Agency.