US Bridges

SR1 / US 431 over I-20

Fair

Calhoun County, Alabama · Intersect. US 431 / I20 · Structure no. 009310

Built
1967
58 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete Continuous
Length
246 ft
4 main spans
Daily traffic
6,759
2023 count
Owner
State
State Highway Agency

About this bridge

SR1 / US 431 over I-20 is a concrete continuous tee beam carrying SR1 / US 431 over I-20 in Calhoun County, Alabama. It was built in 1967, so it is 58 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 6,759 vehicles a day, roughly 16% of them trucks, projected to reach 9,462 by 2043. The structure is 246 ft (75 m) long and 31 ft wide.

Location

Open in Google Maps
CarriesSR1 / US 431
CrossesI-20
LocationIntersect. US 431 / I20
RouteU.S. Route 431
CountyCalhoun County
StateAlabama
Coordinates33.61749, -85.72298
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.4 US tons
Inventory rating31.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length246 ft (75 m)
Longest span68 ft (20.7 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,759 (2023)
Projected traffic9,462 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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$1.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR1 / US 431 over I-20 built?

It was built in 1967, making it 58 years old in 2025.

What condition is SR1 / US 431 over I-20 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 2024.

How much traffic does SR1 / US 431 over I-20 carry?

About 6,759 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is SR1 / US 431 over I-20?

The structure is 246 ft (75 m) long with a longest span of 68 ft (20.7 m) and a deck 31 ft wide.

Who owns SR1 / US 431 over I-20?

It is owned by the State Highway Agency.