US Bridges

SR 605 over Bernard Bayou

Good

Harrison County, Mississippi · 1.6 MI N US 90 · Structure no. 310060502400160

Built
2001
24 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
1,378 ft
14 main spans
Daily traffic
34,000
2023 count
Owner
State
State Highway Agency

About this bridge

SR 605 over Bernard Bayou is a prestressed concrete stringer/multi-beam or girder carrying SR 605 over Bernard Bayou in Harrison County, Mississippi. It was built in 2001, so it is 24 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 34,000 vehicles a day, roughly 5% of them trucks, projected to reach 34,000 by 2043. The structure is 1,378 ft (420 m) long and 99 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSR 605
CrossesBernard Bayou
Location1.6 MI N US 90
RouteState Highway 605
CountyHarrison County
StateMississippi
Coordinates30.40458, -89.02678
Functional classUrban Other Principal Arterial

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.
Superstructure8 Very GoodNo problems noted.
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 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 rating83.7 US tons
Inventory rating37.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans14
Design loadHS 20
Structure length1,378 ft (420 m)
Longest span98 ft (30 m)
Deck width99 ft (30.3 m)
Roadway width87 ft (26.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,000 (2023)
Projected traffic34,000 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 605 over Bernard Bayou built?

It was built in 2001, making it 24 years old in 2025.

What condition is SR 605 over Bernard 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 May 2023.

How much traffic does SR 605 over Bernard Bayou carry?

About 34,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is SR 605 over Bernard Bayou?

The structure is 1,378 ft (420 m) long with a longest span of 98 ft (30 m) and a deck 99 ft wide.

Who owns SR 605 over Bernard Bayou?

It is owned by the State Highway Agency.