US Bridges

Klondyke Bridge over Terrebonne Bayou

FairPosted for load

Terrebonne Parish, Louisiana · 0001 Log MI from Int 243 · Structure no. 025529328903511

Built
1983
42 years old
Condition
Fair
inspected June 2023
Type
Movable - Lift
Steel
Length
179 ft
1 main span
Daily traffic
5,080
2022 count
Owner
County
County Highway Agency

About this bridge

Klondyke Bridge over Terrebonne Bayou is a steel movable - lift carrying Klondyke Bridge over Terrebonne Bayou in Terrebonne Parish, Louisiana. It was built in 1983, so it is 42 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 5,080 vehicles a day, projected to reach 5,588 by 2042. The structure is 179 ft (54.6 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesKlondyke Bridge
CrossesTerrebonne Bayou
Location0001 Log MI from Int 243
RouteCounty Highway 0
CountyTerrebonne Parish
StateLouisiana
Coordinates29.54661, -90.58719
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating22.8 US tons
Inventory rating17.5 US tons

Structure

Structure typeMovable - Lift
MaterialSteel
DeckOpen grating
Main spans1 (+6 approach)
Design loadHS 20
Structure length179 ft (54.6 m)
Longest span79 ft (24.1 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic5,080 (2022)
Projected traffic5,588 by 2042
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Klondyke Bridge over Terrebonne Bayou built?

It was built in 1983, making it 42 years old in 2025.

What condition is Klondyke Bridge over Terrebonne 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 June 2023.

How much traffic does Klondyke Bridge over Terrebonne Bayou carry?

About 5,080 vehicles per day (2022 count).

How long is Klondyke Bridge over Terrebonne Bayou?

The structure is 179 ft (54.6 m) long with a longest span of 79 ft (24.1 m) and a deck 27 ft wide.

Who owns Klondyke Bridge over Terrebonne Bayou?

It is owned by the County Highway Agency.