US Bridges

Herron Bay RD Sout over Herron Bayou

Fair

Mobile County, Alabama · 0.7MI S Al 188 · Structure no. 016589

Built
1996
29 years old
Condition
Fair
inspected March 2024
Type
Slab
Concrete Continuous
Length
63 ft
3 main spans
Daily traffic
189
2024 count
Owner
County
County Highway Agency

About this bridge

Herron Bay RD Sout over Herron Bayou is a concrete continuous slab carrying Herron Bay RD Sout over Herron Bayou in Mobile County, Alabama. It was built in 1996, so it is 29 years old, younger than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 189 vehicles a day, roughly 6% of them trucks, projected to reach 281 by 2044. The structure is 63 ft (19.2 m) long and 27 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHerron Bay RD Sout
CrossesHerron Bayou
Location0.7MI S Al 188
RouteCounty Highway 0
CountyMobile County
StateAlabama
Coordinates30.36083, -88.14317
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75 US tons
Inventory rating50 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length63 ft (19.2 m)
Longest span21 ft (6.4 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic189 (2024)
Projected traffic281 by 2044
Trucks6%
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 proposedNone recorded
Estimated improvement cost$520,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Herron Bay RD Sout over Herron Bayou built?

It was built in 1996, making it 29 years old in 2025.

What condition is Herron Bay RD Sout over Herron Bayou in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Herron Bay RD Sout over Herron Bayou carry?

About 189 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Herron Bay RD Sout over Herron Bayou?

The structure is 63 ft (19.2 m) long with a longest span of 21 ft (6.4 m) and a deck 27 ft wide.

Who owns Herron Bay RD Sout over Herron Bayou?

It is owned by the County Highway Agency.