Structure M108 · Cibola County, NM

IRR BIA RTE 26 over Rio San Jose

Carries IRR BIA RTE 26 over Rio San Jose, North Edge Of Seama.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 3 of 9.

How ratings work
Decksets the rating3/9 · Serious
Superstructuresets the rating3/9 · Serious
Substructure6/9 · Satisfactory
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT107 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 3/9 · sets the ratingSuperstructure 3/9 · sets the ratingSubstructure 6/9

107 ft end to end, longest span 41 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 slab bridge.

Built196858 years old
Length107.0 ft32.6 m
Daily traffic110counted 2021
Last inspectedApril 2023every 24 months

Location

StateNew Mexico
CountyCibola
LocationNorth Edge Of Seama
CarriesIRR BIA RTE 26
CrossesRio San Jose
Coordinates35.04120, -107.52399

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length107.0 ft (32.6 m)
Max Span41.0 ft (12.5 m)
Deck Width31.8 ft (9.7 m)
Deck Area316.2 sq m
Main Spans3
Year Built1968

Traffic

Avg Daily Traffic110 (2021)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerBureau of Indian Affairs
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number00000000000M108

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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