US Bridges

IRR/US-64 over Rattlesnake Wash

Fair

San Juan County, New Mexico · 1.6 MI W of JCT U.S. 491 · Structure no. 000000000005862

Built
1951
74 years old, rebuilt 1960
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
97 ft
2 main spans
Daily traffic
4,813
2023 count
Owner
State
State Highway Agency

About this bridge

IRR/US-64 over Rattlesnake Wash is a prestressed concrete box beam or girders - multiple carrying IRR/US-64 over Rattlesnake Wash in San Juan County, New Mexico. It was built in 1951 and reconstructed in 1960, so it is 74 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 97 ft (29.6 m) long and 37 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesIRR/US-64
CrossesRattlesnake Wash
Location1.6 MI W of JCT U.S. 491
RouteU.S. Route 64
CountySan Juan County
StateNew Mexico
Coordinates36.77286, -108.72567
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.9 US tons
Inventory rating47.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadH 20
Structure length97 ft (29.6 m)
Longest span47 ft (14.3 m)
Deck width37 ft (11.4 m)
Roadway width34 ft (10.5 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$262,000 (2030 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

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

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1960.

What condition is IRR/US-64 over Rattlesnake 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 September 2023.

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

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

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

The structure is 97 ft (29.6 m) long with a longest span of 47 ft (14.3 m) and a deck 37 ft wide.

Who owns IRR/US-64 over Rattlesnake Wash?

It is owned by the State Highway Agency.