US Bridges

SR 75 over Slab Creek

Fair

Marshall County, Alabama · 3.7 MI N JCT SR168 * SR75 · Structure no. 003106

Built
1947
78 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete
Length
170 ft
5 main spans
Daily traffic
5,985
2023 count
Owner
State
State Highway Agency

About this bridge

SR 75 over Slab Creek is a concrete tee beam carrying SR 75 over Slab Creek in Marshall County, Alabama. It was built in 1947, so it is 78 years old, older 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 5 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 5,985 vehicles a day, roughly 7% of them trucks, projected to reach 8,379 by 2043. The structure is 170 ft (51.8 m) long and 30 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 75
CrossesSlab Creek
Location3.7 MI N JCT SR168 * SR75
RouteState Highway 75
CountyMarshall County
StateAlabama
Coordinates34.21304, -86.27965
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.9 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length170 ft (51.8 m)
Longest span34 ft (10.4 m)
Deck width30 ft (9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,985 (2023)
Projected traffic8,379 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 75 over Slab Creek built?

It was built in 1947, making it 78 years old in 2025.

What condition is SR 75 over Slab Creek 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 December 2024.

How much traffic does SR 75 over Slab Creek carry?

About 5,985 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 75 over Slab Creek?

The structure is 170 ft (51.8 m) long with a longest span of 34 ft (10.4 m) and a deck 30 ft wide.

Who owns SR 75 over Slab Creek?

It is owned by the State Highway Agency.