US Bridges

US79/SEC16/L11.512 over Alligator Bayou

Poor

Lee County, Arkansas · .7 MI South of Brickeys · Structure no. 000000000002534

Built
1949
76 years old, rebuilt 1986
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
482 ft
11 main spans
Daily traffic
1,800
2019 count
Owner
State
State Highway Agency

About this bridge

US79/SEC16/L11.512 over Alligator Bayou is a steel stringer/multi-beam or girder carrying US79/SEC16/L11.512 over Alligator Bayou in Lee County, Arkansas. It was built in 1949 and reconstructed in 1986, so it is 76 years old, older than the Arkansas average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,800 vehicles a day, roughly 1% of them trucks, projected to reach 1,936 by 2028. The structure is 482 ft (147 m) long and 43 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesUS79/SEC16/L11.512
CrossesAlligator Bayou
Location.7 MI South of Brickeys
RouteU.S. Route 79
Coordinates34.85724, -90.60631
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans11
Design loadHS 20
Structure length482 ft (147 m)
Longest span45 ft (13.7 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,800 (2019)
Projected traffic1,936 by 2028
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US79/SEC16/L11.512 over Alligator Bayou built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1986.

What condition is US79/SEC16/L11.512 over Alligator Bayou in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

How much traffic does US79/SEC16/L11.512 over Alligator Bayou carry?

About 1,800 vehicles per day (2019 count), of which roughly 1% are trucks.

How long is US79/SEC16/L11.512 over Alligator Bayou?

The structure is 482 ft (147 m) long with a longest span of 45 ft (13.7 m) and a deck 43 ft wide.

Who owns US79/SEC16/L11.512 over Alligator Bayou?

It is owned by the State Highway Agency.