Structure 8905 · McKinley County, NM

31-0049 over Rio Puerco

Carries 31-0049 over Rio Puerco, 0.9 Mi N Of N 11-49.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT111 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

111 ft end to end, longest span 19 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 multi-beam bridge.

Built199333 years old
Length110.6 ft33.7 m
Daily traffic179counted 2023
Last inspectedMarch 2024every 12 months

Location

StateNew Mexico
CountyMcKinley
Location0.9 Mi N Of N 11-49
Carries31-0049
CrossesRio Puerco
Coordinates35.62065, -108.45474

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length110.6 ft (33.7 m)
Max Span19.4 ft (5.9 m)
Deck Width14.1 ft (4.3 m)
Deck Area144.9 sq m
Main Spans7
Year Built1993

Traffic

Avg Daily Traffic179 (2023)
Truck Traffic11%
Lanes On Bridge1

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 12 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000000008905

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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