US Bridges

SH-131/SEC-1/L8.18 over Alligator Bayou

Fair

Lee County, Arkansas · 8.1 MI East of JCT US 79 · Structure no. 0000000000M4047

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Channel Beam
Concrete
Length
93 ft
3 main spans
Daily traffic
117
2018 count
Owner
State
State Highway Agency

About this bridge

SH-131/SEC-1/L8.18 over Alligator Bayou is a concrete channel beam carrying SH-131/SEC-1/L8.18 over Alligator Bayou in Lee County, Arkansas. It was built in 1980, so it is 45 years old, younger 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 117 vehicles a day, roughly 1% of them trucks, projected to reach 68 by 2028. The structure is 93 ft (28.3 m) long and 28 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSH-131/SEC-1/L8.18
CrossesAlligator Bayou
Location8.1 MI East of JCT US 79
RouteState Highway 131
CountyLee County
StateArkansas
Coordinates34.82584, -90.4981
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating51 US tons
Inventory rating30 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadH 15
Structure length93 ft (28.3 m)
Longest span31 ft (9.4 m)
Deck width28 ft (8.6 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic117 (2018)
Projected traffic68 by 2028
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 SH-131/SEC-1/L8.18 over Alligator Bayou built?

It was built in 1980, making it 45 years old in 2025.

What condition is SH-131/SEC-1/L8.18 over Alligator 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 October 2024.

How much traffic does SH-131/SEC-1/L8.18 over Alligator Bayou carry?

About 117 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is SH-131/SEC-1/L8.18 over Alligator Bayou?

The structure is 93 ft (28.3 m) long with a longest span of 31 ft (9.4 m) and a deck 28 ft wide.

Who owns SH-131/SEC-1/L8.18 over Alligator Bayou?

It is owned by the State Highway Agency.