US Bridges

Flagon Rd. over Flagon Bayou

Good

Grant Parish, Louisiana · 0.57 M. W. of Jct. US 167 · Structure no. 082231263922861

Built
1997
28 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
400
2022 count
Owner
County
County Highway Agency

About this bridge

Flagon Rd. over Flagon Bayou is a concrete slab carrying Flagon Rd. over Flagon Bayou in Grant Parish, Louisiana. It was built in 1997, so it is 28 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 400 vehicles a day, projected to reach 440 by 2042. The structure is 76 ft (23.2 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFlagon Rd.
CrossesFlagon Bayou
Location0.57 M. W. of Jct. US 167
RouteCounty Highway 0
CountyGrant Parish
StateLouisiana
Coordinates31.43815, -92.477
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating36.4 US tons
Inventory rating28.2 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 width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2022)
Projected traffic440 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Flagon Rd. over Flagon Bayou built?

It was built in 1997, making it 28 years old in 2025.

What condition is Flagon Rd. over Flagon 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 April 2023.

How much traffic does Flagon Rd. over Flagon Bayou carry?

About 400 vehicles per day (2022 count).

How long is Flagon Rd. over Flagon Bayou?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 27 ft wide.

Who owns Flagon Rd. over Flagon Bayou?

It is owned by the County Highway Agency.