US Bridges

I-55SB-12-LM 57.99 over Drainage Ditch Number 6

FairPosted for load

Mississippi County, Arkansas · .55 MI No of SH 148 · Structure no. 0000000000A3284

Built
1960
65 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete
Length
120 ft
4 main spans
Daily traffic
11,000
2018 count
Owner
State
State Highway Agency

About this bridge

I-55SB-12-LM 57.99 over Drainage Ditch Number 6 is a concrete slab carrying I-55SB-12-LM 57.99 over Drainage Ditch Number 6 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. Its operating status is: posted for load restriction.

It carries about 11,000 vehicles a day, roughly 1% of them trucks, projected to reach 11,592 by 2028. The structure is 120 ft (36.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-55SB-12-LM 57.99
CrossesDrainage Ditch Number 6
Location.55 MI No of SH 148
RouteInterstate 55
CountyMississippi County
StateArkansas
Coordinates35.82106, -89.96667
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length120 ft (36.6 m)
Longest span30 ft (9.1 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,000 (2018)
Projected traffic11,592 by 2028
Trucks1%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was I-55SB-12-LM 57.99 over Drainage Ditch Number 6 built?

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

What condition is I-55SB-12-LM 57.99 over Drainage Ditch Number 6 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 July 2024.

How much traffic does I-55SB-12-LM 57.99 over Drainage Ditch Number 6 carry?

About 11,000 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is I-55SB-12-LM 57.99 over Drainage Ditch Number 6?

The structure is 120 ft (36.6 m) long with a longest span of 30 ft (9.1 m) and a deck 44 ft wide.

Who owns I-55SB-12-LM 57.99 over Drainage Ditch Number 6?

It is owned by the State Highway Agency.