US Bridges

U.S.84 MP 144.447 over Lightwood Knot Ck.M\c

Good

Covington County, Alabama · 4.2 Mi.W.Us 331 · Structure no. 017960

Built
2005
20 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
510 ft
6 main spans
Daily traffic
3,405
2013 count
Owner
State
State Highway Agency

About this bridge

U.S.84 MP 144.447 over Lightwood Knot Ck.M\c is a prestressed concrete stringer/multi-beam or girder carrying U.S.84 MP 144.447 over Lightwood Knot Ck.M\c in Covington County, Alabama. It was built in 2005, so it is 20 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 3,405 vehicles a day, roughly 11% of them trucks, projected to reach 4,568 by 2033. The structure is 510 ft (155.4 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesU.S.84 MP 144.447
CrossesLightwood Knot Ck.M\c
Location4.2 Mi.W.Us 331
RouteU.S. Route 84
CountyCovington County
StateAlabama
Coordinates31.27044, -86.31399
Functional classRural Principal Arterial - Other

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating51.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length510 ft (155.4 m)
Longest span85 ft (25.9 m)
Deck width42 ft (12.9 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,405 (2013)
Projected traffic4,568 by 2033
Trucks11%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$5.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was U.S.84 MP 144.447 over Lightwood Knot Ck.M\c built?

It was built in 2005, making it 20 years old in 2025.

What condition is U.S.84 MP 144.447 over Lightwood Knot Ck.M\c 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 2024.

How much traffic does U.S.84 MP 144.447 over Lightwood Knot Ck.M\c carry?

About 3,405 vehicles per day (2013 count), of which roughly 11% are trucks.

How long is U.S.84 MP 144.447 over Lightwood Knot Ck.M\c?

The structure is 510 ft (155.4 m) long with a longest span of 85 ft (25.9 m) and a deck 42 ft wide.

Who owns U.S.84 MP 144.447 over Lightwood Knot Ck.M\c?

It is owned by the State Highway Agency.