US Bridges

AL9 Nbl over Service Road

Fair

Montgomery County, Alabama · 0.4 Mi.N.Of Troy HWY · Structure no. 008256

Built
1964
61 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete
Length
126 ft
3 main spans
Daily traffic
19,395
2011 count
Owner
State
State Highway Agency

About this bridge

AL9 Nbl over Service Road is a concrete tee beam carrying AL9 Nbl over Service Road in Montgomery County, Alabama. It was built in 1964, so it is 61 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 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 19,395 vehicles a day, roughly 4% of them trucks, projected to reach 31,780 by 2031. The structure is 126 ft (38.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAL9 Nbl
CrossesService Road
Location0.4 Mi.N.Of Troy HWY
RouteU.S. Route 80
CountyMontgomery County
StateAlabama
Coordinates32.3282, -86.23495
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment7: Better than present minimum criteria
Operating rating51.9 US tons
Inventory rating31.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length126 ft (38.4 m)
Longest span42 ft (12.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,395 (2011)
Projected traffic31,780 by 2031
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was AL9 Nbl over Service Road built?

It was built in 1964, making it 61 years old in 2025.

What condition is AL9 Nbl over Service Road 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 December 2023.

How much traffic does AL9 Nbl over Service Road carry?

About 19,395 vehicles per day (2011 count), of which roughly 4% are trucks.

How long is AL9 Nbl over Service Road?

The structure is 126 ft (38.4 m) long with a longest span of 42 ft (12.8 m) and a deck 31 ft wide.

Who owns AL9 Nbl over Service Road?

It is owned by the State Highway Agency.