US Bridges

Seth Cobb RD over Branch

Good

Lauderdale County, Mississippi · Sec 5 T 8N R18E B · Structure no. SA3800000000298

Built
1979
46 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
25 ft
2 main spans
Daily traffic
250
2021 count
Owner
County
County Highway Agency

About this bridge

Seth Cobb RD over Branch is a concrete culvert carrying Seth Cobb RD over Branch in Lauderdale County, Mississippi. It was built in 1979, so it is 46 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 250 vehicles a day, roughly 8% of them trucks, projected to reach 375 by 2044. The structure is 25 ft (7.6 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSeth Cobb RD
CrossesBranch
LocationSec 5 T 8N R18E B
RouteCounty Highway 1405
Coordinates32.57022, -88.47766
Functional classRural Local

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionJanuary 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width44 ft (13.4 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2021)
Projected traffic375 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$550,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Seth Cobb RD over Branch built?

It was built in 1979, making it 46 years old in 2025.

What condition is Seth Cobb RD over 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 January 2024.

How much traffic does Seth Cobb RD over Branch carry?

About 250 vehicles per day (2021 count), of which roughly 8% are trucks.

How long is Seth Cobb RD over Branch?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m) and a deck 44 ft wide.

Who owns Seth Cobb RD over Branch?

It is owned by the County Highway Agency.