US Bridges

Crip Duplechain RD over Bayou Serpent

Fair

Allen Parish, Louisiana · 0.5 MI E of E. Ortego RD · Structure no. 070230297924801

Built
2001
24 years old
Condition
Fair
inspected October 2023
Type
Culvert
Concrete
Length
38 ft
4 main spans
Daily traffic
43
2019 count
Owner
County
County Highway Agency

About this bridge

Crip Duplechain RD over Bayou Serpent is a concrete culvert carrying Crip Duplechain RD over Bayou Serpent in Allen Parish, Louisiana. It was built in 2001, so it is 24 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 43 vehicles a day, projected to reach 47 by 2039. The structure is 38 ft (11.6 m) long and 64 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCrip Duplechain RD
CrossesBayou Serpent
Location0.5 MI E of E. Ortego RD
RouteCounty Highway 0
CountyAllen Parish
StateLouisiana
Coordinates30.49408, -92.79951
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span6 ft (1.8 m)
Deck width64 ft (19.4 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43 (2019)
Projected traffic47 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Crip Duplechain RD over Bayou Serpent built?

It was built in 2001, making it 24 years old in 2025.

What condition is Crip Duplechain RD over Bayou Serpent 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 2023.

How much traffic does Crip Duplechain RD over Bayou Serpent carry?

About 43 vehicles per day (2019 count).

How long is Crip Duplechain RD over Bayou Serpent?

The structure is 38 ft (11.6 m) long with a longest span of 6 ft (1.8 m) and a deck 64 ft wide.

Who owns Crip Duplechain RD over Bayou Serpent?

It is owned by the County Highway Agency.