US Bridges

LA0480 over Boggy Lake

Poor

Red River Parish, Louisiana · 5.05 MI South of US 84 · Structure no. 044103050303491

Built
1975
50 years old
Condition
Poor
inspected June 2024
Type
Slab
Concrete
Length
171 ft
9 main spans
Daily traffic
2,011
2021 count
Owner
State
State Highway Agency

About this bridge

LA0480 over Boggy Lake is a concrete slab carrying LA0480 over Boggy Lake in Red River Parish, Louisiana. It was built in 1975, so it is 50 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 3 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 2,011 vehicles a day, roughly 19% of them trucks, projected to reach 2,212 by 2041. The structure is 171 ft (52.1 m) long and 31 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLA0480
CrossesBoggy Lake
Location5.05 MI South of US 84
RouteState Highway 480
CountyRed River Parish
StateLouisiana
Coordinates31.95792, -93.2899
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating27.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans9
Design loadHS 20
Structure length171 ft (52.1 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,011 (2021)
Projected traffic2,212 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$783,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0480 over Boggy Lake built?

It was built in 1975, making it 50 years old in 2025.

What condition is LA0480 over Boggy Lake 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 June 2024.

How much traffic does LA0480 over Boggy Lake carry?

About 2,011 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0480 over Boggy Lake?

The structure is 171 ft (52.1 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns LA0480 over Boggy Lake?

It is owned by the State Highway Agency.