US Bridges

ST Clair CO HWY11 over Middle Black Creek

Good

St. Clair County, Alabama · 1.0 MI W Acmar P O · Structure no. 014635

Built
1988
37 years old
Condition
Good
inspected February 2025
Type
Culvert
Concrete
Length
60 ft
4 main spans
Daily traffic
400
1999 count
Owner
County
County Highway Agency

About this bridge

ST Clair CO HWY11 over Middle Black Creek is a concrete culvert carrying ST Clair CO HWY11 over Middle Black Creek in St. Clair County, Alabama. It was built in 1988, so it is 37 years old, younger than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 400 vehicles a day, roughly 10% of them trucks, projected to reach 586 by 2029. The structure is 60 ft (18.3 m) long and 14 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesST Clair CO HWY11
CrossesMiddle Black Creek
Location1.0 MI W Acmar P O
RouteCounty Highway 118
StateAlabama
Coordinates33.6191, -86.51651
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating43.7 US tons
Inventory rating26.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span15 ft (4.6 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (1999)
Projected traffic586 by 2029
Trucks10%
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

OwnerCounty Highway Agency
Maintained byCounty 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$840,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST Clair CO HWY11 over Middle Black Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is ST Clair CO HWY11 over Middle Black Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does ST Clair CO HWY11 over Middle Black Creek carry?

About 400 vehicles per day (1999 count), of which roughly 10% are trucks.

How long is ST Clair CO HWY11 over Middle Black Creek?

The structure is 60 ft (18.3 m) long with a longest span of 15 ft (4.6 m) and a deck 14 ft wide.

Who owns ST Clair CO HWY11 over Middle Black Creek?

It is owned by the County Highway Agency.