US Bridges

Boyles Road over Porter Bayou

Good

Bolivar County, Mississippi · Sec 23 T20N R 6W · Structure no. SA0600000000010

Built
1999
26 years old
Condition
Good
inspected January 2025
Type
Channel Beam
Concrete
Length
93 ft
3 main spans
Daily traffic
30
2025 count
Owner
County
County Highway Agency

About this bridge

Boyles Road over Porter Bayou is a concrete channel beam carrying Boyles Road over Porter Bayou in Bolivar County, Mississippi. It was built in 1999, so it is 26 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 30 vehicles a day, roughly 2% of them trucks, projected to reach 45 by 2045. The structure is 93 ft (28.3 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesBoyles Road
CrossesPorter Bayou
LocationSec 23 T20N R 6W
RouteCounty Highway 469
Coordinates33.55797, -90.79547
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating69.6 US tons
Inventory rating41.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span31 ft (9.4 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2025)
Projected traffic45 by 2045
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Boyles Road over Porter Bayou built?

It was built in 1999, making it 26 years old in 2025.

What condition is Boyles Road over Porter 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 January 2025.

How much traffic does Boyles Road over Porter Bayou carry?

About 30 vehicles per day (2025 count), of which roughly 2% are trucks.

How long is Boyles Road over Porter Bayou?

The structure is 93 ft (28.3 m) long with a longest span of 31 ft (9.4 m) and a deck 31 ft wide.

Who owns Boyles Road over Porter Bayou?

It is owned by the County Highway Agency.