US Bridges

Koll Road over West Grand Marais Bayou

Fair

Jefferson Davis Parish, Louisiana · 2.1 MI W of LA 26 · Structure no. 072730174924251

Built
1980
45 years old
Condition
Fair
inspected September 2024
Type
Channel Beam
Prestressed Concrete
Length
60 ft
3 main spans
Daily traffic
60
2019 count
Owner
County
County Highway Agency

About this bridge

Koll Road over West Grand Marais Bayou is a prestressed concrete channel beam carrying Koll Road over West Grand Marais Bayou in Jefferson Davis Parish, Louisiana. It was built in 1980, so it is 45 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 5 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 60 vehicles a day, projected to reach 66 by 2039. The structure is 60 ft (18.3 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesKoll Road
CrossesWest Grand Marais Bayou
Location2.1 MI W of LA 26
RouteCounty Highway 0
CountyJefferson Davis Parish
StateLouisiana
Coordinates30.28997, -92.70704
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating26.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.8 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2019)
Projected traffic66 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 Koll Road over West Grand Marais Bayou built?

It was built in 1980, making it 45 years old in 2025.

What condition is Koll Road over West Grand Marais 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 September 2024.

How much traffic does Koll Road over West Grand Marais Bayou carry?

About 60 vehicles per day (2019 count).

How long is Koll Road over West Grand Marais Bayou?

The structure is 60 ft (18.3 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns Koll Road over West Grand Marais Bayou?

It is owned by the County Highway Agency.