Structure 5089 · Montgomery County, AL

US 31 Nbl over Alabama River

Carries US 31 Nbl over Alabama River, 0.6 Mi S Of Elmore Co Lin.

Overall conditionFair

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

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructuresets the rating5/9 · Fair
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT2,311 FT OVERALL500 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 5/9Substructure 5/9

2,311 ft end to end, longest span 220 ft: about 6.4 football fields. 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 girder bridge.

Built195571 years old
Length2311.0 ft704.4 m
Daily traffic10,450counted 2013
Last inspectedOctober 2024every 24 months

Location

StateAlabama
CountyMontgomery
Location0.6 Mi S Of Elmore Co Lin
CarriesUS 31 Nbl
CrossesAlabama River
Coordinates32.41000, -86.40833

Physical Characteristics

MaterialSteel Continuous
DesignGirder and Floorbeam
Total Length2311.0 ft (704.4 m)
Max Span220.1 ft (67.1 m)
Deck Width32.2 ft (9.8 m)
Deck Area6903.1 sq m
Main Spans4
Year Built1955

Traffic

Avg Daily Traffic10,450 (2013)
Truck Traffic8%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number005089

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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