US Bridges

LA0177 over Chemard Lake

FairPosted for load

De Soto Parish, Louisiana · 2.07 MI North of LA 346 · Structure no. 041601060202071

Built
1959
66 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
220 ft
11 main spans
Daily traffic
2,878
2021 count
Owner
State
State Highway Agency

About this bridge

LA0177 over Chemard Lake is a concrete slab carrying LA0177 over Chemard Lake in De Soto Parish, Louisiana. It was built in 1959, so it is 66 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. Its operating status is: posted for load restriction.

It carries about 2,878 vehicles a day, roughly 19% of them trucks, projected to reach 3,165 by 2041. The structure is 220 ft (67.1 m) long and 30 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLA0177
CrossesChemard Lake
Location2.07 MI North of LA 346
RouteState Highway 177
CountyDe Soto Parish
StateLouisiana
Coordinates31.94013, -93.45162
Functional classRural Major Collector

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.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.6 US tons
Inventory rating18.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans11
Design loadH 15
Structure length220 ft (67.1 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,878 (2021)
Projected traffic3,165 by 2041
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 LA0177 over Chemard Lake built?

It was built in 1959, making it 66 years old in 2025.

What condition is LA0177 over Chemard Lake 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 May 2023.

How much traffic does LA0177 over Chemard Lake carry?

About 2,878 vehicles per day (2021 count), of which roughly 19% are trucks.

How long is LA0177 over Chemard Lake?

The structure is 220 ft (67.1 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns LA0177 over Chemard Lake?

It is owned by the State Highway Agency.