US Bridges

Deadwood RD over Coulee

Fair

Terrebonne Parish, Louisiana · 0.3 MI North of LA 20 · Structure no. 025529413905811

Built
1966
59 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
64 ft
4 main spans
Daily traffic
358
2020 count
Owner
County
County Highway Agency

About this bridge

Deadwood RD over Coulee is a concrete slab carrying Deadwood RD over Coulee in Terrebonne Parish, Louisiana. It was built in 1966, so it is 59 years old, older 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 5 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 358 vehicles a day, projected to reach 393 by 2040. The structure is 64 ft (19.5 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDeadwood RD
CrossesCoulee
Location0.3 MI North of LA 20
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.69539, -90.96722
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating27.1 US tons
Inventory rating20.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans4
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.9 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic358 (2020)
Projected traffic393 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 Deadwood RD over Coulee built?

It was built in 1966, making it 59 years old in 2025.

What condition is Deadwood RD over Coulee 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 April 2023.

How much traffic does Deadwood RD over Coulee carry?

About 358 vehicles per day (2020 count).

How long is Deadwood RD over Coulee?

The structure is 64 ft (19.5 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Deadwood RD over Coulee?

It is owned by the County Highway Agency.