Structure 7257 · Bernalillo County, NM

Nm-317 over I-25 Nbls/sbls-isleta

Carries Nm-317 over I-25 Nbls/sbls-isleta, 6.6 Mi N Jct I-25/NM-6.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating5/9 · Fair
Substructure6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT285 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 5/9 · sets the ratingSubstructure 6/9

285 ft end to end, longest span 140 ft: about 4 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 multi-beam bridge.

Built1971rebuilt 1990
Length285.1 ft86.9 m
Daily traffic2,926counted 2023
Last inspectedSeptember 2024every 24 months

Location

StateNew Mexico
CountyBernalillo
Location6.6 Mi N Jct I-25/NM-6
CarriesNm-317
CrossesI-25 Nbls/sbls-isleta
Coordinates34.90458, -106.72419

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length285.1 ft (86.9 m)
Max Span140.1 ft (42.7 m)
Deck Width50.9 ft (15.5 m)
Deck Area1347.0 sq m
Main Spans2
Year Built1971 (reconstructed 1990)

Traffic

Avg Daily Traffic2,926 (2023)
Truck Traffic5%
Lanes On Bridge2
Lanes Under Bridge4

Inspection & Ownership

Last InspectionSeptember 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007257

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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