US Bridges

SR 193 over Heron Bay

Fair

Mobile County, Alabama · 1.8 MI S SR 188 · Structure no. 012620

Built
1981
44 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
325 ft
5 main spans
Daily traffic
6,065
2023 count
Owner
State
State Highway Agency

About this bridge

SR 193 over Heron Bay is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 193 over Heron Bay in Mobile County, Alabama. It was built in 1981, so it is 44 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 6,065 vehicles a day, roughly 3% of them trucks, projected to reach 9,098 by 2043. The structure is 325 ft (99.1 m) long and 43 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesSR 193
CrossesHeron Bay
Location1.8 MI S SR 188
RouteState Highway 193
CountyMobile County
StateAlabama
Coordinates30.33809, -88.12869
Functional classRural Minor Arterial

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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.7 US tons
Inventory rating35.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length325 ft (99.1 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,065 (2023)
Projected traffic9,098 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$3.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 193 over Heron Bay built?

It was built in 1981, making it 44 years old in 2025.

What condition is SR 193 over Heron Bay 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 August 2024.

How much traffic does SR 193 over Heron Bay carry?

About 6,065 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is SR 193 over Heron Bay?

The structure is 325 ft (99.1 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns SR 193 over Heron Bay?

It is owned by the State Highway Agency.