Structure 5841 · Socorro County, NM

I-25 Nbl over San Lorenzo Arroyo

Carries I-25 Nbl over San Lorenzo Arroyo, 5.1 Mi N Of Jct Nm-408.

Overall conditionPoor

Set by its lowest-rated component: Deck and Superstructure at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructuresets the rating4/9 · Poor
Substructure5/9 · Fair
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT153 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 4/9 · sets the ratingSubstructure 5/9

153 ft end to end, longest span 33 ft: about 2 semi-trucks nose to tail. Lengths and the semi-truck 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.

Built195868 years old
Length152.9 ft46.6 m
Daily traffic12,116counted 2023
Last inspectedJuly 2023every 24 months

Location

StateNew Mexico
CountySocorro
Location5.1 Mi N Of Jct Nm-408
CarriesI-25 Nbl
CrossesSan Lorenzo Arroyo
Coordinates34.23019, -106.91728

Physical Characteristics

MaterialConcrete Continuous
DesignSlab
Total Length152.9 ft (46.6 m)
Max Span33.1 ft (10.1 m)
Deck Width42.0 ft (12.8 m)
Deck Area596.5 sq m
Main Spans5
Year Built1958

Traffic

Avg Daily Traffic12,116 (2023)
Truck Traffic45%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is possibly eligible (requires evaluation)
Scour Critical5 — Stable for scour
Structure Number000000000005841

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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