US Bridges

LA0001 over Mcmanor Canal

Fair

Ascension Parish, Louisiana · 5.8 M SE of LA 1&LA 69 · Structure no. 610300500504621

Built
1935
90 years old
Condition
Fair
inspected June 2023
Type
Culvert
Concrete
Length
38 ft
4 main spans
Daily traffic
7,858
2021 count
Owner
State
State Highway Agency

About this bridge

LA0001 over Mcmanor Canal is a concrete culvert carrying LA0001 over Mcmanor Canal in Ascension Parish, Louisiana. It was built in 1935, so it is 90 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 7,858 vehicles a day, roughly 17% of them trucks, projected to reach 8,643 by 2041. The structure is 38 ft (11.6 m) long and 95 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLA0001
CrossesMcmanor Canal
Location5.8 M SE of LA 1&LA 69
RouteState Highway 1
CountyAscension Parish
StateLouisiana
Coordinates30.12691, -91.06375
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 15
Structure length38 ft (11.6 m)
Longest span4 ft (1.2 m)
Deck width95 ft (29 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,858 (2021)
Projected traffic8,643 by 2041
Trucks17%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 LA0001 over Mcmanor Canal built?

It was built in 1935, making it 90 years old in 2025.

What condition is LA0001 over Mcmanor Canal 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 June 2023.

How much traffic does LA0001 over Mcmanor Canal carry?

About 7,858 vehicles per day (2021 count), of which roughly 17% are trucks.

How long is LA0001 over Mcmanor Canal?

The structure is 38 ft (11.6 m) long with a longest span of 4 ft (1.2 m) and a deck 95 ft wide.

Who owns LA0001 over Mcmanor Canal?

It is owned by the State Highway Agency.