US Bridges

Old Lower Bay Rd. over Bayou

Good

Hancock County, Mississippi · Sec 22 T 9S R15W B · Structure no. SA2300000000060

Built
1980
45 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
1,200
2021 count
Owner
County
County Highway Agency

About this bridge

Old Lower Bay Rd. over Bayou is a concrete culvert carrying Old Lower Bay Rd. over Bayou in Hancock County, Mississippi. It was built in 1980, so it is 45 years old, older 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 1,200 vehicles a day, roughly 8% of them trucks, projected to reach 1,800 by 2041. The structure is 22 ft (6.7 m) long and 24 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesOld Lower Bay Rd.
CrossesBayou
LocationSec 22 T 9S R15W B
RouteCounty Highway 1106
Coordinates30.24861, -89.48417
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.1 US tons
Inventory rating46.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,200 (2021)
Projected traffic1,800 by 2041
Trucks8%
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

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 Old Lower Bay Rd. over Bayou built?

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

What condition is Old Lower Bay Rd. over 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 September 2023.

How much traffic does Old Lower Bay Rd. over Bayou carry?

About 1,200 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Old Lower Bay Rd. over Bayou?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 24 ft wide.

Who owns Old Lower Bay Rd. over Bayou?

It is owned by the County Highway Agency.