US Bridges

US0171 over MP Railroad Creek

Fair

Caddo Parish, Louisiana · 1.0 Mi. N. of LA 3132 · Structure no. 040900250809811

Built
1976
49 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
850 ft
1 main span
Daily traffic
17,212
2021 count
Owner
State
State Highway Agency

About this bridge

US0171 over MP Railroad Creek is a steel stringer/multi-beam or girder carrying US0171 over MP Railroad Creek in Caddo Parish, Louisiana. It was built in 1976, so it is 49 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 6 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 17,212 vehicles a day, roughly 8% of them trucks, projected to reach 18,933 by 2041. The structure is 850 ft (259.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesUS0171
CrossesMP Railroad Creek
Location1.0 Mi. N. of LA 3132
RouteU.S. Route 171
CountyCaddo Parish
StateLouisiana
Coordinates32.4293, -93.7848
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+14 approach)
Design loadHS 20
Structure length850 ft (259.1 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,212 (2021)
Projected traffic18,933 by 2041
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US0171 over MP Railroad Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is US0171 over MP Railroad Creek 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 2025.

How much traffic does US0171 over MP Railroad Creek carry?

About 17,212 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is US0171 over MP Railroad Creek?

The structure is 850 ft (259.1 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns US0171 over MP Railroad Creek?

It is owned by the State Highway Agency.