US Bridges

County HWY 1128 over Big Slab Creek

FairPosted for load

Marshall County, Alabama · 7087 Ft NW JCT 1127 · Structure no. 004139

Built
1951
74 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
100
1994 count
Owner
County
County Highway Agency

About this bridge

County HWY 1128 over Big Slab Creek is a steel stringer/multi-beam or girder carrying County HWY 1128 over Big Slab Creek in Marshall County, Alabama. It was built in 1951, so it is 74 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, projected to reach 200 by 2044. The structure is 51 ft (15.5 m) long and 22 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesCounty HWY 1128
CrossesBig Slab Creek
Location7087 Ft NW JCT 1127
RouteCounty Highway 128
CountyMarshall County
StateAlabama
Coordinates34.21224, -86.27287
Functional classRural Local

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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating22.8 US tons
Inventory rating12.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length51 ft (15.5 m)
Longest span47 ft (14.3 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1994)
Projected traffic200 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$354,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County HWY 1128 over Big Slab Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is County HWY 1128 over Big 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 August 2024.

How much traffic does County HWY 1128 over Big Slab Creek carry?

About 100 vehicles per day (1994 count).

How long is County HWY 1128 over Big Slab Creek?

The structure is 51 ft (15.5 m) long with a longest span of 47 ft (14.3 m) and a deck 22 ft wide.

Who owns County HWY 1128 over Big Slab Creek?

It is owned by the County Highway Agency.