Structure 8113 · San Juan County, NM

45-6675 over San Juan River

Carries 45-6675 over San Juan River, 1.2 Mi S Us-64 @ Mp-39.8.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure6/9 · Satisfactory
Substructuresets the rating4/9 · Poor
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT397 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9Substructure 4/9 · sets the rating

397 ft end to end, longest span 98 ft: about 6 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.

Built1960rebuilt 2011
Length397.0 ft121 m
Daily traffic2,054counted 2023
Last inspectedFebruary 2024every 24 months

Location

StateNew Mexico
CountySan Juan
Location1.2 Mi S Us-64 @ Mp-39.8
Carries45-6675
CrossesSan Juan River
Coordinates37.28333, -109.01667

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length397.0 ft (121 m)
Max Span98.1 ft (29.9 m)
Deck Width30.8 ft (9.4 m)
Deck Area1137.4 sq m
Main Spans4
Year Built1960 (reconstructed 2011)

Traffic

Avg Daily Traffic2,054 (2023)
Truck Traffic5%
Lanes On Bridge2

Inspection & Ownership

Last InspectionFebruary 2024
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalUnknown
Structure Number000000000008113

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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