US Bridges

LA0605 over Lake Bruin Bayou

FairPosted for load

Tensas Parish, Louisiana · 4.5 MI North of LA 604 · Structure no. 585400203009381

Built
1951
74 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
135 ft
7 main spans
Daily traffic
2,306
2021 count
Owner
State
State Highway Agency

About this bridge

LA0605 over Lake Bruin Bayou is a wood or timber stringer/multi-beam or girder carrying LA0605 over Lake Bruin Bayou in Tensas Parish, Louisiana. It was built in 1951, so it is 74 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. Its operating status is: posted for load restriction.

It carries about 2,306 vehicles a day, roughly 21% of them trucks, projected to reach 2,536 by 2041. The structure is 135 ft (41.1 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLA0605
CrossesLake Bruin Bayou
Location4.5 MI North of LA 604
RouteState Highway 605
CountyTensas Parish
StateLouisiana
Coordinates31.98749, -91.2562
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans7
Design loadH 15
Structure length135 ft (41.1 m)
Longest span19 ft (5.8 m)
Deck width29 ft (8.7 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,306 (2021)
Projected traffic2,536 by 2041
Trucks21%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$643,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0605 over Lake Bruin Bayou built?

It was built in 1951, making it 74 years old in 2025.

What condition is LA0605 over Lake Bruin 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 July 2024.

How much traffic does LA0605 over Lake Bruin Bayou carry?

About 2,306 vehicles per day (2021 count), of which roughly 21% are trucks.

How long is LA0605 over Lake Bruin Bayou?

The structure is 135 ft (41.1 m) long with a longest span of 19 ft (5.8 m) and a deck 29 ft wide.

Who owns LA0605 over Lake Bruin Bayou?

It is owned by the State Highway Agency.