US Bridges

Siegen LN over Clay Cut Bayou

Fair

East Baton Rouge Parish, Louisiana · 2.2 MI SE I-12 US 61 JCT · Structure no. 611708174003831

Built
1984
41 years old
Condition
Fair
inspected May 2023
Type
Slab
Concrete
Length
140 ft
7 main spans
Daily traffic
38,982
2021 count
Owner
County
County Highway Agency

About this bridge

Siegen LN over Clay Cut Bayou is a concrete slab carrying Siegen LN over Clay Cut Bayou in East Baton Rouge Parish, Louisiana. It was built in 1984, so it is 41 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 38,982 vehicles a day, roughly 9% of them trucks, projected to reach 42,880 by 2041. The structure is 140 ft (42.7 m) long and 68 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSiegen LN
CrossesClay Cut Bayou
Location2.2 MI SE I-12 US 61 JCT
RouteCounty Highway 0
Coordinates30.39849, -91.05557
Functional classUrban Other Principal Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length140 ft (42.7 m)
Longest span20 ft (6.1 m)
Deck width68 ft (20.7 m)
Roadway width65 ft (19.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic38,982 (2021)
Projected traffic42,880 by 2041
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Siegen LN over Clay Cut Bayou built?

It was built in 1984, making it 41 years old in 2025.

What condition is Siegen LN over Clay Cut Bayou 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 Siegen LN over Clay Cut Bayou carry?

About 38,982 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is Siegen LN over Clay Cut Bayou?

The structure is 140 ft (42.7 m) long with a longest span of 20 ft (6.1 m) and a deck 68 ft wide.

Who owns Siegen LN over Clay Cut Bayou?

It is owned by the County Highway Agency.