US Bridges

Ils Road over Macks Bayou

Good

Bossier Parish, Louisiana · 1.1 MI SE of 307th Hq Bld · Structure no. AFLAAWUB06947

Built
2017
8 years old
Condition
Good
inspected November 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
2
2016 count
Owner
Federal
Air Force

About this bridge

Ils Road over Macks Bayou is a concrete culvert carrying Ils Road over Macks Bayou in Bossier Parish, Louisiana. It was built in 2017, so it is 8 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2 vehicles a day, projected to reach 2 by 2036. The structure is 24 ft (7.3 m) long and 16 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesIls Road
CrossesMacks Bayou
Location1.1 MI SE of 307th Hq Bld
CountyBossier Parish
StateLouisiana
Coordinates32.48264, -93.6509
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width16 ft (4.9 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2 (2016)
Projected traffic2 by 2036
Trucks—
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerAir Force
Maintained byAir Force
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 Ils Road over Macks Bayou built?

It was built in 2017, making it 8 years old in 2025.

What condition is Ils Road over Macks Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Ils Road over Macks Bayou carry?

About 2 vehicles per day (2016 count).

How long is Ils Road over Macks Bayou?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m) and a deck 16 ft wide.

Who owns Ils Road over Macks Bayou?

It is owned by the Air Force.