US Bridges

Al - 53 (us 231) over Calvert Prong

Good

Blount County, Alabama · US 231 @ Calvert Prong · Structure no. 018885

Built
2006
19 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
300 ft
3 main spans
Daily traffic
6,460
2024 count
Owner
State
State Highway Agency

About this bridge

Al - 53 (us 231) over Calvert Prong is a prestressed concrete stringer/multi-beam or girder carrying Al - 53 (us 231) over Calvert Prong in Blount County, Alabama. It was built in 2006, so it is 19 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 6,460 vehicles a day, roughly 3% of them trucks, projected to reach 8,397 by 2044. The structure is 300 ft (91.4 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesAl - 53 (us 231)
CrossesCalvert Prong
LocationUS 231 @ Calvert Prong
RouteU.S. Route 231
CountyBlount County
StateAlabama
Coordinates33.985, -86.50833
Functional classRural Major Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating43.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length300 ft (91.4 m)
Longest span100 ft (30.5 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,460 (2024)
Projected traffic8,397 by 2044
Trucks3%
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

OwnerState Highway Agency
Maintained byState 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$3.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Al - 53 (us 231) over Calvert Prong built?

It was built in 2006, making it 19 years old in 2025.

What condition is Al - 53 (us 231) over Calvert Prong 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 March 2024.

How much traffic does Al - 53 (us 231) over Calvert Prong carry?

About 6,460 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Al - 53 (us 231) over Calvert Prong?

The structure is 300 ft (91.4 m) long with a longest span of 100 ft (30.5 m) and a deck 47 ft wide.

Who owns Al - 53 (us 231) over Calvert Prong?

It is owned by the State Highway Agency.