US Bridges

Al 139 over Mahan Creek

Fair

Bibb County, Alabama · Brierfield · Structure no. 006388

Built
1958
67 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
248 ft
3 main spans
Daily traffic
3,216
2020 count
Owner
State
State Highway Agency

About this bridge

Al 139 over Mahan Creek is a steel stringer/multi-beam or girder carrying Al 139 over Mahan Creek in Bibb County, Alabama. It was built in 1958, so it is 67 years old, older 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 3,216 vehicles a day, roughly 5% of them trucks, projected to reach 4,331 by 2040. The structure is 248 ft (75.6 m) long and 33 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesAl 139
CrossesMahan Creek
LocationBrierfield
RouteState Highway 139
CountyBibb County
StateAlabama
Coordinates33.04277, -86.90608
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating44.9 US tons
Inventory rating26.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadH 20
Structure length248 ft (75.6 m)
Longest span80 ft (24.4 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,216 (2020)
Projected traffic4,331 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Al 139 over Mahan Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is Al 139 over Mahan 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 April 2023.

How much traffic does Al 139 over Mahan Creek carry?

About 3,216 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Al 139 over Mahan Creek?

The structure is 248 ft (75.6 m) long with a longest span of 80 ft (24.4 m) and a deck 33 ft wide.

Who owns Al 139 over Mahan Creek?

It is owned by the State Highway Agency.