US Bridges

ST Clair 79 over Broken Arrow Creek

Good

St. Clair County, Alabama · 05 MI NW Refuge Church · Structure no. 013981

Built
1986
39 years old
Condition
Good
inspected December 2024
Type
Channel Beam
Concrete
Length
102 ft
3 main spans
Daily traffic
525
1999 count
Owner
County
County Highway Agency

About this bridge

ST Clair 79 over Broken Arrow Creek is a concrete channel beam carrying ST Clair 79 over Broken Arrow Creek in St. Clair County, Alabama. It was built in 1986, so it is 39 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 525 vehicles a day, roughly 10% of them trucks, projected to reach 821 by 2029. The structure is 102 ft (31.1 m) long and 26 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesST Clair 79
CrossesBroken Arrow Creek
Location05 MI NW Refuge Church
RouteCounty Highway 79
StateAlabama
Coordinates33.67621, -86.23838
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating82.9 US tons
Inventory rating49.8 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span34 ft (10.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic525 (1999)
Projected traffic821 by 2029
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost$747,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was ST Clair 79 over Broken Arrow Creek built?

It was built in 1986, making it 39 years old in 2025.

What condition is ST Clair 79 over Broken Arrow 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 December 2024.

How much traffic does ST Clair 79 over Broken Arrow Creek carry?

About 525 vehicles per day (1999 count), of which roughly 10% are trucks.

How long is ST Clair 79 over Broken Arrow Creek?

The structure is 102 ft (31.1 m) long with a longest span of 34 ft (10.4 m) and a deck 26 ft wide.

Who owns ST Clair 79 over Broken Arrow Creek?

It is owned by the County Highway Agency.