US Bridges

Swan Lake RD over Macks Bayou

Good

Bossier Parish, Louisiana · 1.5 MI North of US 80 · Structure no. 040832333934071

Built
1986
39 years old, rebuilt 2012
Condition
Good
inspected December 2024
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
14,078
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Swan Lake RD over Macks Bayou is a concrete slab carrying Swan Lake RD over Macks Bayou in Bossier Parish, Louisiana. It was built in 1986 and reconstructed in 2012, so it is 39 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 14,078 vehicles a day, projected to reach 15,485 by 2041. The structure is 76 ft (23.2 m) long and 81 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSwan Lake RD
CrossesMacks Bayou
Location1.5 MI North of US 80
RouteCounty Highway 0
Coordinates32.55506, -93.67751
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.9 US tons
Inventory rating44.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length76 ft (23.2 m)
Longest span19 ft (5.8 m)
Deck width81 ft (24.7 m)
Roadway width78 ft (23.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,078 (2021)
Projected traffic15,485 by 2041
Trucks—
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Swan Lake RD over Macks Bayou built?

It was built in 1986, making it 39 years old in 2025. It was reconstructed in 2012.

What condition is Swan Lake RD 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 December 2024.

How much traffic does Swan Lake RD over Macks Bayou carry?

About 14,078 vehicles per day (2021 count).

How long is Swan Lake RD over Macks Bayou?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 81 ft wide.

Who owns Swan Lake RD over Macks Bayou?

It is owned by the City or Municipal Highway Agency.