US Bridges

U.S 31 Sbl over Alabama River

Fair

Montgomery County, Alabama · 0.6 Mi. S. of Elmore CO L · Structure no. 017406

Built
2001
24 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
2,310 ft
4 main spans
Daily traffic
10,450
2013 count
Owner
State
State Highway Agency

About this bridge

U.S 31 Sbl over Alabama River is a steel stringer/multi-beam or girder carrying U.S 31 Sbl over Alabama River in Montgomery County, Alabama. It was built in 2001, so it is 24 years old, younger than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,450 vehicles a day, roughly 8% of them trucks, projected to reach 13,424 by 2033. The structure is 2,310 ft (704.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesU.S 31 Sbl
CrossesAlabama River
Location0.6 Mi. S. of Elmore CO L
RouteU.S. Route 31
CountyMontgomery County
StateAlabama
Coordinates32.40919, -86.40766
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating45.3 US tons
Inventory rating22.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4 (+15 approach)
Design loadHS 20
Structure length2,310 ft (704.1 m)
Longest span225 ft (68.6 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,450 (2013)
Projected traffic13,424 by 2033
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$22.3 million (2025 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was U.S 31 Sbl over Alabama River built?

It was built in 2001, making it 24 years old in 2025.

What condition is U.S 31 Sbl over Alabama River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2024.

How much traffic does U.S 31 Sbl over Alabama River carry?

About 10,450 vehicles per day (2013 count), of which roughly 8% are trucks.

How long is U.S 31 Sbl over Alabama River?

The structure is 2,310 ft (704.1 m) long with a longest span of 225 ft (68.6 m) and a deck 43 ft wide.

Who owns U.S 31 Sbl over Alabama River?

It is owned by the State Highway Agency.