US Bridges

Nation Rd. over Duralde Coulee

PoorClosed to traffic

Acadia Parish, Louisiana · 0.6 Mi. S. of LA 13 · Structure no. 030130152921551

Built
1970
55 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
32 ft
2 main spans
Daily traffic
336
2020 count
Owner
County
County Highway Agency

About this bridge

Nation Rd. over Duralde Coulee is a wood or timber stringer/multi-beam or girder carrying Nation Rd. over Duralde Coulee in Acadia Parish, Louisiana. It was built in 1970, so it is 55 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.

It carries about 336 vehicles a day, projected to reach 369 by 2040. The structure is 32 ft (9.8 m) long and 20 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNation Rd.
CrossesDuralde Coulee
Location0.6 Mi. S. of LA 13
RouteCounty Highway 0
CountyAcadia Parish
StateLouisiana
Coordinates30.25285, -92.26085
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 12 months
Operating statusClosed to all traffic
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating25 US tons
Inventory rating17.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length32 ft (9.8 m)
Longest span16 ft (4.9 m)
Deck width20 ft (6.1 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic336 (2020)
Projected traffic369 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Nation Rd. over Duralde Coulee built?

It was built in 1970, making it 55 years old in 2025.

What condition is Nation Rd. over Duralde Coulee in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in July 2024.

How much traffic does Nation Rd. over Duralde Coulee carry?

About 336 vehicles per day (2020 count).

How long is Nation Rd. over Duralde Coulee?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (4.9 m) and a deck 20 ft wide.

Who owns Nation Rd. over Duralde Coulee?

It is owned by the County Highway Agency.