US Bridges

US79 S-1 Lm 12.32 over Lawrence Bayou

Fair

Columbia County, Arkansas · 4.75 MI S of Magnolia · Structure no. 0000000000M1446

Built
1930
95 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
4,500
2018 count
Owner
State
State Highway Agency

About this bridge

US79 S-1 Lm 12.32 over Lawrence Bayou is a concrete culvert carrying US79 S-1 Lm 12.32 over Lawrence Bayou in Columbia County, Arkansas. It was built in 1930, so it is 95 years old, older than the Arkansas average of 45.1 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 4,500 vehicles a day, roughly 1% of them trucks, projected to reach 3,604 by 2027. The structure is 22 ft (6.6 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesUS79 S-1 Lm 12.32
CrossesLawrence Bayou
Location4.75 MI S of Magnolia
RouteU.S. Route 79
CountyColumbia County
StateArkansas
Coordinates33.18416, -93.21242
Functional classRural Minor Arterial

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 inspectionFebruary 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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating39 US tons
Inventory rating24 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length22 ft (6.6 m)
Longest span10 ft (3 m)
Deck width40 ft (12.2 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2018)
Projected traffic3,604 by 2027
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US79 S-1 Lm 12.32 over Lawrence Bayou built?

It was built in 1930, making it 95 years old in 2025.

What condition is US79 S-1 Lm 12.32 over Lawrence Bayou 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 February 2024.

How much traffic does US79 S-1 Lm 12.32 over Lawrence Bayou carry?

About 4,500 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is US79 S-1 Lm 12.32 over Lawrence Bayou?

The structure is 22 ft (6.6 m) long with a longest span of 10 ft (3 m) and a deck 40 ft wide.

Who owns US79 S-1 Lm 12.32 over Lawrence Bayou?

It is owned by the State Highway Agency.