US Bridges

I 110 over L&n RR and Keegan Bayou

Good

Harrison County, Mississippi · 0.1 MI N US 90 · Structure no. 110011002400010

Built
1988
37 years old
Condition
Good
inspected December 2023
Type
Segmental Box Girder
Prestressed Concrete Continuous
Length
5,303 ft
44 main spans
Daily traffic
24,000
2023 count
Owner
State
State Highway Agency

About this bridge

I 110 over L&n RR and Keegan Bayou is a prestressed concrete continuous segmental box girder carrying I 110 over L&n RR and Keegan Bayou in Harrison County, Mississippi. It was built in 1988, so it is 37 years old, younger than the Mississippi average of 38.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 24,000 vehicles a day, roughly 2% of them trucks, projected to reach 24,000 by 2043. The structure is 5,303 ft (1,616.4 m) long and 83 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesI 110
CrossesL&n RR and Keegan Bayou
Location0.1 MI N US 90
RouteInterstate 110
Coordinates30.39637, -88.89434
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.8 US tons
Inventory rating36.4 US tons

Structure

Structure typeSegmental Box Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans44
Design loadHS 20
Structure length5,303 ft (1,616.4 m)
Longest span130 ft (39.6 m)
Deck width83 ft (25.2 m)
Roadway width77 ft (23.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,000 (2023)
Projected traffic24,000 by 2043
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 110 over L&n RR and Keegan Bayou built?

It was built in 1988, making it 37 years old in 2025.

What condition is I 110 over L&n RR and Keegan Bayou in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does I 110 over L&n RR and Keegan Bayou carry?

About 24,000 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is I 110 over L&n RR and Keegan Bayou?

The structure is 5,303 ft (1,616.4 m) long with a longest span of 130 ft (39.6 m) and a deck 83 ft wide.

Who owns I 110 over L&n RR and Keegan Bayou?

It is owned by the State Highway Agency.