US Bridges

I-65 over Middle Norton Branch

Fair

Mobile County, Alabama · 0.9 MI N SR 158 · Structure no. 009000

Built
1966
59 years old
Condition
Fair
inspected March 2024
Type
Culvert
Concrete
Length
56 ft
4 main spans
Daily traffic
50,144
2022 count
Owner
State
State Highway Agency

About this bridge

I-65 over Middle Norton Branch is a concrete culvert carrying I-65 over Middle Norton Branch in Mobile County, Alabama. It was built in 1966, so it is 59 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 50,144 vehicles a day, roughly 14% of them trucks, projected to reach 75,216 by 2042. The structure is 56 ft (17.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesI-65
CrossesMiddle Norton Branch
Location0.9 MI N SR 158
RouteInterstate 65
CountyMobile County
StateAlabama
Coordinates30.81426, -88.10068
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating98 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length56 ft (17.1 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50,144 (2022)
Projected traffic75,216 by 2042
Trucks14%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-65 over Middle Norton Branch built?

It was built in 1966, making it 59 years old in 2025.

What condition is I-65 over Middle Norton Branch 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 March 2024.

How much traffic does I-65 over Middle Norton Branch carry?

About 50,144 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is I-65 over Middle Norton Branch?

The structure is 56 ft (17.1 m) long with a longest span of 12 ft (3.7 m).

Who owns I-65 over Middle Norton Branch?

It is owned by the State Highway Agency.