US Bridges

LA1077 over Cowpen Branch

Fair

St. Tammany Parish, Louisiana · 2.60 Miles East of La. 10 · Structure no. 625200000620308

Built
2015
10 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
30 ft
5 main spans
Daily traffic
1,400
2016 count
Owner
State
State Highway Agency

About this bridge

LA1077 over Cowpen Branch is a concrete culvert carrying LA1077 over Cowpen Branch in St. Tammany Parish, Louisiana. It was built in 2015, so it is 10 years old, younger 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 1,400 vehicles a day, roughly 13% of them trucks, projected to reach 1,540 by 2036. The structure is 30 ft (9.1 m) long and 66 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesLA1077
CrossesCowpen Branch
Location2.60 Miles East of La. 10
RouteState Highway 1077
CountySt. Tammany Parish
StateLouisiana
Coordinates30.58469, -90.1911
Functional classRural Local

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating34 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span5 ft (1.5 m)
Deck width66 ft (20.1 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,400 (2016)
Projected traffic1,540 by 2036
Trucks13%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was LA1077 over Cowpen Branch built?

It was built in 2015, making it 10 years old in 2025.

What condition is LA1077 over Cowpen 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 September 2023.

How much traffic does LA1077 over Cowpen Branch carry?

About 1,400 vehicles per day (2016 count), of which roughly 13% are trucks.

How long is LA1077 over Cowpen Branch?

The structure is 30 ft (9.1 m) long with a longest span of 5 ft (1.5 m) and a deck 66 ft wide.

Who owns LA1077 over Cowpen Branch?

It is owned by the State Highway Agency.