US Bridges

SR 193 NB over Rattlesnake Bayou

Fair

Mobile County, Alabama · 1.2 MI S I-10 · Structure no. 013062

Built
1983
42 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
1,189 ft
29 main spans
Daily traffic
12,510
2023 count
Owner
State
State Highway Agency

About this bridge

SR 193 NB over Rattlesnake Bayou is a prestressed concrete continuous stringer/multi-beam or girder carrying SR 193 NB over Rattlesnake Bayou in Mobile County, Alabama. It was built in 1983, so it is 42 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 12,510 vehicles a day, roughly 9% of them trucks, projected to reach 18,765 by 2043. The structure is 1,189 ft (362.4 m) long and 43 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesSR 193 NB
CrossesRattlesnake Bayou
Location1.2 MI S I-10
RouteState Highway 193
CountyMobile County
StateAlabama
Coordinates30.58145, -88.14006
Functional classUrban Other Principal 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 protection8 Very GoodNo problems noted.
Last inspectionAugust 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.8 US tons
Inventory rating29.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans29
Design loadHS 20
Structure length1,189 ft (362.4 m)
Longest span41 ft (12.5 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic12,510 (2023)
Projected traffic18,765 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$11.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 193 NB over Rattlesnake Bayou built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR 193 NB over Rattlesnake 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 August 2024.

How much traffic does SR 193 NB over Rattlesnake Bayou carry?

About 12,510 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is SR 193 NB over Rattlesnake Bayou?

The structure is 1,189 ft (362.4 m) long with a longest span of 41 ft (12.5 m) and a deck 43 ft wide.

Who owns SR 193 NB over Rattlesnake Bayou?

It is owned by the State Highway Agency.