US Bridges

I65 Nbl / Sbl over Mill ST

Fair

Montgomery County, Alabama · 0.7 Mi.N.Of Fairview Ave. · Structure no. 010503

Built
1971
54 years old
Condition
Fair
inspected April 2023
Type
Tee Beam
Concrete Continuous
Length
196 ft
3 main spans
Daily traffic
37,200
2013 count
Owner
State
State Highway Agency

About this bridge

I65 Nbl / Sbl over Mill ST is a concrete continuous tee beam carrying I65 Nbl / Sbl over Mill ST in Montgomery County, Alabama. It was built in 1971, so it is 54 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 37,200 vehicles a day, roughly 12% of them trucks, projected to reach 47,129 by 2033. The structure is 196 ft (59.7 m) long and 150 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI65 Nbl / Sbl
CrossesMill ST
Location0.7 Mi.N.Of Fairview Ave.
RouteInterstate 65
CountyMontgomery County
StateAlabama
Coordinates32.3, -86.33333
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 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 US tons
Inventory rating30.5 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length196 ft (59.7 m)
Longest span74 ft (22.6 m)
Deck width150 ft (45.8 m)
Roadway width67 ft (20.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37,200 (2013)
Projected traffic47,129 by 2033
Trucks12%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate 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$7.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I65 Nbl / Sbl over Mill ST built?

It was built in 1971, making it 54 years old in 2025.

What condition is I65 Nbl / Sbl over Mill ST 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 I65 Nbl / Sbl over Mill ST carry?

About 37,200 vehicles per day (2013 count), of which roughly 12% are trucks.

How long is I65 Nbl / Sbl over Mill ST?

The structure is 196 ft (59.7 m) long with a longest span of 74 ft (22.6 m) and a deck 150 ft wide.

Who owns I65 Nbl / Sbl over Mill ST?

It is owned by the State Highway Agency.