Structure 18632 · Montgomery County, AL

US 31 over I-65

Carries US 31 over I-65, Us31*in65 Interchange.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT361 FT OVERALL50 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9 · sets the ratingSuperstructure 6/9 · sets the ratingSubstructure 7/9

361 ft end to end, longest span 108 ft: about 5 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.

Built200323 years old
Length360.9 ft110 m
Daily traffic7,050counted 2013
Last inspectedJuly 2023every 24 months

Location

StateAlabama
CountyMontgomery
LocationUs31*in65 Interchange
CarriesUS 31
CrossesI-65
Coordinates32.26634, -86.35477

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length360.9 ft (110 m)
Max Span108.3 ft (33 m)
Deck Width84.6 ft (25.8 m)
Deck Area2,838 sq m
Main Spans4
Year Built2003

Traffic

Avg Daily Traffic7,050 (2013)
Truck Traffic5%
Lanes On Bridge5
Lanes Under Bridge5

Inspection & Ownership

Last InspectionJuly 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number018632

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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