US Bridges

US0171 over Brush Bayou

Fair

Caddo Parish, Louisiana · 0.1 Mi. S. of LA 511 · Structure no. 040900250810582

Built
1960
65 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete
Length
100 ft
5 main spans
Daily traffic
16,911
2021 count
Owner
State
State Highway Agency

About this bridge

US0171 over Brush Bayou is a concrete slab carrying US0171 over Brush Bayou in Caddo Parish, Louisiana. It was built in 1960, so it is 65 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 16,911 vehicles a day, roughly 8% of them trucks, projected to reach 18,602 by 2041. The structure is 100 ft (30.5 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS0171
CrossesBrush Bayou
Location0.1 Mi. S. of LA 511
RouteU.S. Route 171
CountyCaddo Parish
StateLouisiana
Coordinates32.44023, -93.7817
Functional classUrban Other Principal Arterial

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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span20 ft (6.1 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,911 (2021)
Projected traffic18,602 by 2041
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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$498,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US0171 over Brush Bayou built?

It was built in 1960, making it 65 years old in 2025.

What condition is US0171 over Brush 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 January 2024.

How much traffic does US0171 over Brush Bayou carry?

About 16,911 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is US0171 over Brush Bayou?

The structure is 100 ft (30.5 m) long with a longest span of 20 ft (6.1 m) and a deck 37 ft wide.

Who owns US0171 over Brush Bayou?

It is owned by the State Highway Agency.