Structure 5862 · San Juan County, NM

Irr/us-64 over Rattlesnake Wash

Carries Irr/us-64 over Rattlesnake Wash, 1.6 Mi W Of Jct U.s. 491.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT97 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

97 ft end to end, longest span 47 ft. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a box-beam bridge.

Built1951rebuilt 1960
Length97.1 ft29.6 m
Daily traffic4,813counted 2023
Last inspectedSeptember 2023every 24 months

Location

StateNew Mexico
CountySan Juan
Location1.6 Mi W Of Jct U.s. 491
CarriesIrr/us-64
CrossesRattlesnake Wash
Coordinates36.77286, -108.72567

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length97.1 ft (29.6 m)
Max Span46.9 ft (14.3 m)
Deck Width37.4 ft (11.4 m)
Deck Area337.4 sq m
Main Spans2
Year Built1951 (reconstructed 1960)

Traffic

Avg Daily Traffic4,813 (2023)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical3 — Scour critical
Structure Number000000000005862

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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