Structure 6216 · Union County, NM

Nm-370 over Alamosa Creek

Carries Nm-370 over Alamosa Creek, 20.9 Mi N Of Jct Us-64/87.

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 overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT64 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

64 ft end to end, longest span 31 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.

Built196066 years old
Length64.0 ft19.5 m
Daily traffic82counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateNew Mexico
CountyUnion
Location20.9 Mi N Of Jct Us-64/87
CarriesNm-370
CrossesAlamosa Creek
Coordinates36.68697, -103.30689

Physical Characteristics

MaterialWood or Timber
DesignStringer/Multi-beam
Total Length64.0 ft (19.5 m)
Max Span30.8 ft (9.4 m)
Deck Width29.9 ft (9.1 m)
Deck Area177.4 sq m
Main Spans2
Year Built1960

Traffic

Avg Daily Traffic82 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical7 — Countermeasures installed
Structure Number000000000006216

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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