US Bridges

LA0016 over Colyell Bay

Fair

Livingston Parish, Louisiana · 2.0 Mi. E. of LA 42 · Structure no. 623202600202191

Built
1979
46 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
680 ft
1 main span
Daily traffic
6,743
2021 count
Owner
State
State Highway Agency

About this bridge

LA0016 over Colyell Bay is a steel stringer/multi-beam or girder carrying LA0016 over Colyell Bay in Livingston Parish, Louisiana. It was built in 1979, so it is 46 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 6,743 vehicles a day, roughly 11% of them trucks, projected to reach 7,417 by 2041. The structure is 680 ft (207.3 m) long and 43 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

Open in Google Maps
CarriesLA0016
CrossesColyell Bay
Location2.0 Mi. E. of LA 42
RouteState Highway 16
CountyLivingston Parish
StateLouisiana
Coordinates30.32679, -90.8234
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating71 US tons
Inventory rating42 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+32 approach)
Design loadHS 20
Structure length680 ft (207.3 m)
Longest span40 ft (12.2 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,743 (2021)
Projected traffic7,417 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 LA0016 over Colyell Bay built?

It was built in 1979, making it 46 years old in 2025.

What condition is LA0016 over Colyell Bay 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 January 2024.

How much traffic does LA0016 over Colyell Bay carry?

About 6,743 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is LA0016 over Colyell Bay?

The structure is 680 ft (207.3 m) long with a longest span of 40 ft (12.2 m) and a deck 43 ft wide.

Who owns LA0016 over Colyell Bay?

It is owned by the State Highway Agency.