US Bridges

US0171 over I-10

Fair

Calcasieu Parish, Louisiana · 0.3 MI N of LA 3020 · Structure no. 071000240100781

Built
1963
62 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete Continuous
Length
374 ft
6 main spans
Daily traffic
13,667
2021 count
Owner
State
State Highway Agency

About this bridge

US0171 over I-10 is a concrete continuous tee beam carrying US0171 over I-10 in Calcasieu Parish, Louisiana. It was built in 1963, so it is 62 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 13,667 vehicles a day, roughly 17% of them trucks, projected to reach 15,033 by 2041. The structure is 374 ft (114 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0171
CrossesI-10
Location0.3 MI N of LA 3020
RouteU.S. Route 171
CountyCalcasieu Parish
StateLouisiana
Coordinates30.24611, -93.18038
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.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment7: Better than present minimum criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length374 ft (114 m)
Longest span73 ft (22.3 m)
Deck width38 ft (11.6 m)
Roadway width33 ft (10.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,667 (2021)
Projected traffic15,033 by 2041
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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$1.6 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was US0171 over I-10 built?

It was built in 1963, making it 62 years old in 2025.

What condition is US0171 over I-10 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 March 2024.

How much traffic does US0171 over I-10 carry?

About 13,667 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is US0171 over I-10?

The structure is 374 ft (114 m) long with a longest span of 73 ft (22.3 m) and a deck 38 ft wide.

Who owns US0171 over I-10?

It is owned by the State Highway Agency.