US Bridges

Big Lake Mgt RD over Big Roaring Bayou

GoodPosted for load

Franklin Parish, Louisiana · 0.407 MI N of LA.4 · Structure no. 582100000580176

Built
2017
8 years old
Condition
Good
inspected May 2024
Type
Slab
Concrete
Length
200 ft
8 main spans
Daily traffic
30
2000 count
Owner
State
Other State Agency

About this bridge

Big Lake Mgt RD over Big Roaring Bayou is a concrete slab carrying Big Lake Mgt RD over Big Roaring Bayou in Franklin 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, projected to reach 33 by 2020. The structure is 200 ft (61 m) long and 16 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesBig Lake Mgt RD
CrossesBig Roaring Bayou
Location0.407 MI N of LA.4
RouteCounty Highway 0
CountyFranklin Parish
StateLouisiana
Coordinates32.09694, -91.50048
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating53.2 US tons
Inventory rating39.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans8
Design loadHL 93
Structure length200 ft (61 m)
Longest span25 ft (7.6 m)
Deck width16 ft (4.8 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2000)
Projected traffic33 by 2020
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byCounty 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 Big Lake Mgt RD over Big Roaring Bayou built?

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

What condition is Big Lake Mgt RD over Big Roaring 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 May 2024.

How much traffic does Big Lake Mgt RD over Big Roaring Bayou carry?

About 30 vehicles per day (2000 count).

How long is Big Lake Mgt RD over Big Roaring Bayou?

The structure is 200 ft (61 m) long with a longest span of 25 ft (7.6 m) and a deck 16 ft wide.

Who owns Big Lake Mgt RD over Big Roaring Bayou?

It is owned by the Other State Agency and maintained by the County Highway Agency.