US Bridges

LA0040 over Morgan Branch

FairPosted for load

St. Tammany Parish, Louisiana · 1.0 M E of LA 1077 · Structure no. 625202690702991

Built
1954
71 years old
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
77 ft
4 main spans
Daily traffic
3,755
2021 count
Owner
State
State Highway Agency

About this bridge

LA0040 over Morgan Branch is a wood or timber stringer/multi-beam or girder carrying LA0040 over Morgan Branch in St. Tammany Parish, Louisiana. It was built in 1954, so it is 71 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. Its operating status is: posted for load restriction.

It carries about 3,755 vehicles a day, roughly 12% of them trucks, projected to reach 4,130 by 2041. The structure is 77 ft (23.5 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesLA0040
CrossesMorgan Branch
Location1.0 M E of LA 1077
RouteState Highway 40
CountySt. Tammany Parish
StateLouisiana
Coordinates30.61791, -90.2014
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating17 US tons
Inventory rating11 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadH 15
Structure length77 ft (23.5 m)
Longest span19 ft (5.8 m)
Deck width26 ft (8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,755 (2021)
Projected traffic4,130 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$397,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LA0040 over Morgan Branch built?

It was built in 1954, making it 71 years old in 2025.

What condition is LA0040 over Morgan Branch 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 October 2023.

How much traffic does LA0040 over Morgan Branch carry?

About 3,755 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is LA0040 over Morgan Branch?

The structure is 77 ft (23.5 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns LA0040 over Morgan Branch?

It is owned by the State Highway Agency.