US Bridges

SH 312-01- Lm 4.13 over I 55-SEC 12

Fair

Mississippi County, Arkansas · 4.13 MI E SH 18 JCT · Structure no. 000000000003287

Built
1960
65 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
255 ft
4 main spans
Daily traffic
1,300
2018 count
Owner
State
State Highway Agency

About this bridge

SH 312-01- Lm 4.13 over I 55-SEC 12 is a steel stringer/multi-beam or girder carrying SH 312-01- Lm 4.13 over I 55-SEC 12 in Mississippi County, Arkansas. It was built in 1960, so it is 65 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 1,300 vehicles a day, roughly 1% of them trucks, projected to reach 2,196 by 2028. The structure is 255 ft (77.7 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesSH 312-01- Lm 4.13
CrossesI 55-SEC 12
Location4.13 MI E SH 18 JCT
RouteState Highway 312
CountyMississippi County
StateArkansas
Coordinates35.87143, -89.9326
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length255 ft (77.7 m)
Longest span76 ft (23.2 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,300 (2018)
Projected traffic2,196 by 2028
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed5 mi (8 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SH 312-01- Lm 4.13 over I 55-SEC 12 built?

It was built in 1960, making it 65 years old in 2025.

What condition is SH 312-01- Lm 4.13 over I 55-SEC 12 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 2024.

How much traffic does SH 312-01- Lm 4.13 over I 55-SEC 12 carry?

About 1,300 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is SH 312-01- Lm 4.13 over I 55-SEC 12?

The structure is 255 ft (77.7 m) long with a longest span of 76 ft (23.2 m) and a deck 31 ft wide.

Who owns SH 312-01- Lm 4.13 over I 55-SEC 12?

It is owned by the State Highway Agency.