Structure 8712 · McKinley County, NM

31-003a over Unnamed Waterway

Carries 31-003a over Unnamed Waterway, 0.1 Mile North Of I-40.

Overall conditionGood

Set by its lowest-rated component: Culvert at 7 of 9.

How ratings work
Culvertsets the rating7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT106 FT ACROSS25 FT0ELEVATION · LENGTHS TO SCALE
Culvert 7/9

A culvert 106 ft across with 16 openings. 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, so those are drawn as typical for a culvert.

Built196660 years old
Length106.0 ft32.3 m
Daily traffic3,894counted 2023
Last inspectedSeptember 2023every 48 months

Location

StateNew Mexico
CountyMcKinley
Location0.1 Mile North Of I-40
Carries31-003a
CrossesUnnamed Waterway
Coordinates35.52371, -108.78158

Physical Characteristics

MaterialConcrete
DesignCulvert
Total Length106.0 ft (32.3 m)
Max Span5.9 ft (1.8 m)
Deck Area235.8 sq m
Main Spans16
Year Built1966

Traffic

Avg Daily Traffic3,894 (2023)
Truck Traffic11%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 48 months
OwnerCity/Municipal Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000008712

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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