US Bridges

I-10 EB over Allen Spring Branch

Fair

Baldwin County, Alabama · 3.5 MI E CO RD 87 · Structure no. 008533

Built
1965
60 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
37 ft
3 main spans
Daily traffic
18,495
2022 count
Owner
State
State Highway Agency

About this bridge

I-10 EB over Allen Spring Branch is a concrete culvert carrying I-10 EB over Allen Spring Branch in Baldwin County, Alabama. It was built in 1965, so it is 60 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 18,495 vehicles a day, roughly 24% of them trucks, projected to reach 27,743 by 2042. The structure is 37 ft (11.3 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-10 EB
CrossesAllen Spring Branch
Location3.5 MI E CO RD 87
RouteInterstate 10
CountyBaldwin County
StateAlabama
Coordinates30.58061, -87.50064
Functional classRural 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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.4 US tons
Inventory rating46.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length37 ft (11.3 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 traffic18,495 (2022)
Projected traffic27,743 by 2042
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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$1.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was I-10 EB over Allen Spring Branch built?

It was built in 1965, making it 60 years old in 2025.

What condition is I-10 EB over Allen Spring 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 October 2023.

How much traffic does I-10 EB over Allen Spring Branch carry?

About 18,495 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I-10 EB over Allen Spring Branch?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m).

Who owns I-10 EB over Allen Spring Branch?

It is owned by the State Highway Agency.