US Bridges

I-165 S to Frtg RD over Bay Bridge RD

Fair

Mobile County, Alabama · I-165 @ Bay Bridge RD · Structure no. 015577

Built
1993
32 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
480 ft
5 main spans
Daily traffic
10,397
2023 count
Owner
State
State Highway Agency

About this bridge

I-165 S to Frtg RD over Bay Bridge RD is a prestressed concrete continuous stringer/multi-beam or girder carrying I-165 S to Frtg RD over Bay Bridge RD in Mobile County, Alabama. It was built in 1993, so it is 32 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 10,397 vehicles a day, roughly 10% of them trucks, projected to reach 15,596 by 2043. The structure is 480 ft (146.3 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-165 S to Frtg RD
CrossesBay Bridge RD
LocationI-165 @ Bay Bridge RD
RouteInterstate 165
CountyMobile County
StateAlabama
Coordinates30.73126, -88.07734
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating57.4 US tons
Inventory rating37.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5 (+4 approach)
Design loadHS 20
Structure length480 ft (146.3 m)
Longest span80 ft (24.4 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,397 (2023)
Projected traffic15,596 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
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$3.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-165 S to Frtg RD over Bay Bridge RD built?

It was built in 1993, making it 32 years old in 2025.

What condition is I-165 S to Frtg RD over Bay Bridge RD 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 I-165 S to Frtg RD over Bay Bridge RD carry?

About 10,397 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-165 S to Frtg RD over Bay Bridge RD?

The structure is 480 ft (146.3 m) long with a longest span of 80 ft (24.4 m) and a deck 28 ft wide.

Who owns I-165 S to Frtg RD over Bay Bridge RD?

It is owned by the State Highway Agency.