US Bridges

CO Rt 143 over Relief Structure

Fair

Lawrence County, Alabama · 2.55 MI W JCT SR 101 · Structure no. 009666

Built
1968
57 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete
Length
20 ft
2 main spans
Daily traffic
380
1992 count
Owner
County
County Highway Agency

About this bridge

CO Rt 143 over Relief Structure is a concrete culvert carrying CO Rt 143 over Relief Structure in Lawrence County, Alabama. It was built in 1968, so it is 57 years old, older than the Alabama average of 51.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 380 vehicles a day, roughly 11% of them trucks, projected to reach 350 by 2036. The structure is 20 ft (6.1 m) long and 36 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesCO Rt 143
CrossesRelief Structure
Location2.55 MI W JCT SR 101
RouteCounty Highway 143
StateAlabama
Coordinates34.64333, -87.44667
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating98 US tons
Inventory rating69.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length20 ft (6.1 m)
Longest span10 ft (3 m)
Deck width36 ft (11 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic380 (1992)
Projected traffic350 by 2036
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$278,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was CO Rt 143 over Relief Structure built?

It was built in 1968, making it 57 years old in 2025.

What condition is CO Rt 143 over Relief Structure in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does CO Rt 143 over Relief Structure carry?

About 380 vehicles per day (1992 count), of which roughly 11% are trucks.

How long is CO Rt 143 over Relief Structure?

The structure is 20 ft (6.1 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

Who owns CO Rt 143 over Relief Structure?

It is owned by the County Highway Agency.