US Bridges

Slagle Loop over Big Branch

Good

Vernon Parish, Louisiana · 0.9 M. N. of LA 8 near Sl · Structure no. 085831129930761

Built
1984
41 years old
Condition
Good
inspected April 2023
Type
Slab
Concrete
Length
76 ft
4 main spans
Daily traffic
330
1976 count
Owner
County
County Highway Agency

About this bridge

Slagle Loop over Big Branch is a concrete slab carrying Slagle Loop over Big Branch in Vernon Parish, Louisiana. It was built in 1984, so it is 41 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 330 vehicles a day, projected to reach 363 by 1996. The structure is 76 ft (23.2 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesSlagle Loop
CrossesBig Branch
Location0.9 M. N. of LA 8 near Sl
RouteCounty Highway 0
Coordinates31.2167, -93.1269
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 evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating30.8 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 width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic330 (1976)
Projected traffic363 by 1996
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 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 Slagle Loop over Big Branch built?

It was built in 1984, making it 41 years old in 2025.

What condition is Slagle Loop over Big Branch 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 Slagle Loop over Big Branch carry?

About 330 vehicles per day (1976 count).

How long is Slagle Loop over Big Branch?

The structure is 76 ft (23.2 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns Slagle Loop over Big Branch?

It is owned by the County Highway Agency.