US Bridges

Carnes Road over Double Branch

Good

Forrest County, Mississippi · Sec 27 T 1S R13W B · Structure no. SA180000000A025

Built
2022
3 years old
Condition
Good
inspected October 2024
Type
Channel Beam
Concrete
Length
155 ft
5 main spans
Daily traffic
470
2024 count
Owner
County
County Highway Agency

About this bridge

Carnes Road over Double Branch is a concrete channel beam carrying Carnes Road over Double Branch in Forrest County, Mississippi. It was built in 2022, so it is 3 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 470 vehicles a day, roughly 8% of them trucks, projected to reach 610 by 2044. The structure is 155 ft (47.2 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

CarriesCarnes Road
CrossesDouble Branch
LocationSec 27 T 1S R13W B
RouteCounty Highway 129
Coordinates30.93184, -89.28229
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.2 US tons
Inventory rating37.1 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans5
Design loadHL 93
Structure length155 ft (47.2 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic470 (2024)
Projected traffic610 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 Carnes Road over Double Branch built?

It was built in 2022, making it 3 years old in 2025.

What condition is Carnes Road over Double Branch 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 October 2024.

How much traffic does Carnes Road over Double Branch carry?

About 470 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Carnes Road over Double Branch?

The structure is 155 ft (47.2 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns Carnes Road over Double Branch?

It is owned by the County Highway Agency.