Structure 7110 · Bernalillo County, NM

Nm-303 over South Diversion Channel

Carries Nm-303 over South Diversion Channel, 1.7 Mi S Of Jct Nm-500.

Overall conditionFair

Set by its lowest-rated component: Deck and Substructure at 6 of 9.

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT100 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 7/9Substructure 6/9 · sets the rating

100 ft end to end. 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.

Built196957 years old
Length100.1 ft30.5 m
Daily traffic4,170counted 2023
Last inspectedMarch 2023every 24 months

Location

StateNew Mexico
CountyBernalillo
Location1.7 Mi S Of Jct Nm-500
CarriesNm-303
CrossesSouth Diversion Channel
Coordinates35.00270, -106.66286

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length100.1 ft (30.5 m)
Max Span96.1 ft (29.3 m)
Deck Width44.9 ft (13.7 m)
Deck Area417.9 sq m
Main Spans1
Year Built1969

Traffic

Avg Daily Traffic4,170 (2023)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number000000000007110

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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