US Bridges

Parish Line Road over Serpent Bayou

Fair

Jefferson Davis Parish, Louisiana · 1.1 MI W of LA 99 · Structure no. 072700000500334

Built
2013
12 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
73 ft
4 main spans
Daily traffic
60
2019 count
Owner
County
County Highway Agency

About this bridge

Parish Line Road over Serpent Bayou is a wood or timber stringer/multi-beam or girder carrying Parish Line Road over Serpent Bayou in Jefferson Davis Parish, Louisiana. It was built in 2013, so it is 12 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 60 vehicles a day, projected to reach 66 by 2039. The structure is 73 ft (22.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesParish Line Road
CrossesSerpent Bayou
Location1.1 MI W of LA 99
RouteCounty Highway 0
CountyJefferson Davis Parish
StateLouisiana
Coordinates30.4366, -92.79417
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.3 US tons
Inventory rating33.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 20
Structure length73 ft (22.3 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2019)
Projected traffic66 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Parish Line Road over Serpent Bayou built?

It was built in 2013, making it 12 years old in 2025.

What condition is Parish Line Road over Serpent Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Parish Line Road over Serpent Bayou carry?

About 60 vehicles per day (2019 count).

How long is Parish Line Road over Serpent Bayou?

The structure is 73 ft (22.3 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns Parish Line Road over Serpent Bayou?

It is owned by the County Highway Agency.