US Bridges

US 84 MP 144.577 over Lightwood Knot Relief

Good

Covington County, Alabama · 4.0 Mi.W. US 331 · Structure no. 017972

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

About this bridge

US 84 MP 144.577 over Lightwood Knot Relief is a prestressed concrete stringer/multi-beam or girder carrying US 84 MP 144.577 over Lightwood Knot Relief 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 8 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 204 ft (62.2 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 84 MP 144.577
CrossesLightwood Knot Relief
Location4.0 Mi.W. US 331
RouteU.S. Route 84
StateAlabama
Coordinates31.26978, -86.31149
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.8 US tons
Inventory rating40.6 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length204 ft (62.2 m)
Longest span34 ft (10.4 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$2.3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 84 MP 144.577 over Lightwood Knot Relief built?

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

What condition is US 84 MP 144.577 over Lightwood Knot Relief 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 US 84 MP 144.577 over Lightwood Knot Relief carry?

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

How long is US 84 MP 144.577 over Lightwood Knot Relief?

The structure is 204 ft (62.2 m) long with a longest span of 34 ft (10.4 m) and a deck 42 ft wide.

Who owns US 84 MP 144.577 over Lightwood Knot Relief?

It is owned by the State Highway Agency.