US Bridges

LA0421 over Alexander Creek W

Poor

West Feliciana Parish, Louisiana · 0.6 M E of US 61 · Structure no. 616308630200561

Built
1971
54 years old
Condition
Poor
inspected December 2023
Type
Slab
Concrete
Length
59 ft
3 main spans
Daily traffic
739
2021 count
Owner
State
State Highway Agency

About this bridge

LA0421 over Alexander Creek W is a concrete slab carrying LA0421 over Alexander Creek W in West Feliciana Parish, Louisiana. It was built in 1971, so it is 54 years old, older than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 739 vehicles a day, roughly 14% of them trucks, projected to reach 812 by 2041. The structure is 59 ft (18 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesLA0421
CrossesAlexander Creek W
Location0.6 M E of US 61
RouteState Highway 421
CountyWest Feliciana Parish
StateLouisiana
Coordinates30.89349, -91.33559
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating32.8 US tons
Inventory rating25.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length59 ft (18 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic739 (2021)
Projected traffic812 by 2041
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0421 over Alexander Creek W built?

It was built in 1971, making it 54 years old in 2025.

What condition is LA0421 over Alexander Creek W in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does LA0421 over Alexander Creek W carry?

About 739 vehicles per day (2021 count), of which roughly 14% are trucks.

How long is LA0421 over Alexander Creek W?

The structure is 59 ft (18 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0421 over Alexander Creek W?

It is owned by the State Highway Agency.