US Bridges

Mobile ST over Three Mile Creek

Fair

Mobile County, Alabama · 300 N Cotton ST · Structure no. 005611

Built
1992
33 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
230 ft
5 main spans
Daily traffic
5,797
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mobile ST over Three Mile Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Mobile ST over Three Mile Creek in Mobile County, Alabama. It was built in 1992, so it is 33 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 5 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 5,797 vehicles a day, roughly 4% of them trucks, projected to reach 8,695 by 2044. The structure is 230 ft (70.1 m) long and 34 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMobile ST
CrossesThree Mile Creek
Location300 N Cotton ST
RouteCity Street 0
CountyMobile County
StateAlabama
Coordinates30.70974, -88.10234
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.9 US tons
Inventory rating47.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length230 ft (70.1 m)
Longest span50 ft (15.2 m)
Deck width34 ft (10.3 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,797 (2024)
Projected traffic8,695 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mobile ST over Three Mile Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is Mobile ST over Three Mile Creek 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 February 2024.

How much traffic does Mobile ST over Three Mile Creek carry?

About 5,797 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Mobile ST over Three Mile Creek?

The structure is 230 ft (70.1 m) long with a longest span of 50 ft (15.2 m) and a deck 34 ft wide.

Who owns Mobile ST over Three Mile Creek?

It is owned by the City or Municipal Highway Agency.