Structure 6222 · San Juan County, NM

Us-550 Nbl over Hampton Arroyo

Carries Us-550 Nbl over Hampton Arroyo, 0.70 Mi North Jct Nm-516.

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 overall3/9 · Serious
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT118 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

118 ft end to end, longest span 17 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.

Built196165 years old
Length118.1 ft36 m
Daily traffic15,330counted 2023
Last inspectedMay 2023every 24 months

Location

StateNew Mexico
CountySan Juan
Location0.70 Mi North Jct Nm-516
CarriesUs-550 Nbl
CrossesHampton Arroyo
Coordinates36.83099, -107.98213

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length118.1 ft (36 m)
Max Span17.1 ft (5.2 m)
Deck Width40.7 ft (12.4 m)
Deck Area446.4 sq m
Main Spans7
Year Built1961

Traffic

Avg Daily Traffic15,330 (2023)
Truck Traffic12%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical4 — Foundations need monitoring
Structure Number000000000006222

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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