US Bridges

US 43 SB over Sisters Creek

Good

Mobile County, Alabama · 1.7 MI N CO RD 84 · Structure no. 017492

Built
2001
24 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
118 ft
3 main spans
Daily traffic
15,582
2023 count
Owner
State
State Highway Agency

About this bridge

US 43 SB over Sisters Creek is a prestressed concrete stringer/multi-beam or girder carrying US 43 SB over Sisters Creek in Mobile 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15,582 vehicles a day, roughly 13% of them trucks, projected to reach 23,373 by 2043. The structure is 118 ft (36 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 43 SB
CrossesSisters Creek
Location1.7 MI N CO RD 84
RouteU.S. Route 43
StateAlabama
Coordinates30.99338, -88.02561
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.9 US tons
Inventory rating40.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length118 ft (36 m)
Longest span39 ft (11.9 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,582 (2023)
Projected traffic23,373 by 2043
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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$1.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 43 SB over Sisters Creek built?

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

What condition is US 43 SB over Sisters Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does US 43 SB over Sisters Creek carry?

About 15,582 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is US 43 SB over Sisters Creek?

The structure is 118 ft (36 m) long with a longest span of 39 ft (11.9 m) and a deck 43 ft wide.

Who owns US 43 SB over Sisters Creek?

It is owned by the State Highway Agency.