US Bridges

US0171 over Cypress Bayou Relief No

Fair

Caddo Parish, Louisiana · 7.3 Mi. S. of LA 526 · Structure no. 040900250800152

Built
1953
72 years old
Condition
Fair
inspected January 2024
Type
Tee Beam
Concrete
Length
180 ft
6 main spans
Daily traffic
3,031
2021 count
Owner
State
State Highway Agency

About this bridge

US0171 over Cypress Bayou Relief No is a concrete tee beam carrying US0171 over Cypress Bayou Relief No in Caddo Parish, Louisiana. It was built in 1953, so it is 72 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 3,031 vehicles a day, roughly 18% of them trucks, projected to reach 3,334 by 2041. The structure is 180 ft (54.9 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesUS0171
CrossesCypress Bayou Relief No
Location7.3 Mi. S. of LA 526
RouteU.S. Route 171
CountyCaddo Parish
StateLouisiana
Coordinates32.30256, -93.8285
Functional classRural Principal Arterial - Other

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 rating78 US tons
Inventory rating47 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span30 ft (9.1 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,031 (2021)
Projected traffic3,334 by 2041
Trucks18%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRelief for waterway
Detour if closed6.2 mi (10 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$819,000
NavigationNo navigation control on waterway

Frequently asked questions

When was US0171 over Cypress Bayou Relief No built?

It was built in 1953, making it 72 years old in 2025.

What condition is US0171 over Cypress Bayou Relief No 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 Cypress Bayou Relief No carry?

About 3,031 vehicles per day (2021 count), of which roughly 18% are trucks.

How long is US0171 over Cypress Bayou Relief No?

The structure is 180 ft (54.9 m) long with a longest span of 30 ft (9.1 m) and a deck 32 ft wide.

Who owns US0171 over Cypress Bayou Relief No?

It is owned by the State Highway Agency.