US Bridges

Isaac Williams over Branch of Bayou Porteaux

Good

Jackson County, Mississippi · Sec 12 T 7S R 9W · Structure no. SA3000000000205

Built
2018
7 years old
Condition
Good
inspected March 2023
Type
Channel Beam
Concrete
Length
38 ft
2 main spans
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

Isaac Williams over Branch of Bayou Porteaux is a concrete channel beam carrying Isaac Williams over Branch of Bayou Porteaux in Jackson County, Mississippi. It was built in 2018, so it is 7 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 75 by 2043. The structure is 38 ft (11.6 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesIsaac Williams
CrossesBranch of Bayou Porteaux
LocationSec 12 T 7S R 9W
RouteCity Street 0
Coordinates30.44521, -88.83357
Functional classUrban Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.3 US tons
Inventory rating37.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadHL 93
Structure length38 ft (11.6 m)
Longest span19 ft (5.8 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic75 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Isaac Williams over Branch of Bayou Porteaux built?

It was built in 2018, making it 7 years old in 2025.

What condition is Isaac Williams over Branch of Bayou Porteaux 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 March 2023.

How much traffic does Isaac Williams over Branch of Bayou Porteaux carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Isaac Williams over Branch of Bayou Porteaux?

The structure is 38 ft (11.6 m) long with a longest span of 19 ft (5.8 m) and a deck 26 ft wide.

Who owns Isaac Williams over Branch of Bayou Porteaux?

It is owned by the County Highway Agency.