US Bridges

Wall Triana Rd. over Knox Creek

Fair

Madison County, Alabama · 0.9 MI N. JCT US 72 · Structure no. 001367

Built
1919
106 years old, rebuilt 1936
Condition
Fair
inspected March 2024
Type
Slab
Concrete
Length
22 ft
2 main spans
Daily traffic
31,850
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Wall Triana Rd. over Knox Creek is a concrete slab carrying Wall Triana Rd. over Knox Creek in Madison County, Alabama. It was built in 1919 and reconstructed in 1936, so it is 106 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 5 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 31,850 vehicles a day, roughly 5% of them trucks, projected to reach 44,590 by 2044. The structure is 22 ft (6.7 m) long and 36 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesWall Triana Rd.
CrossesKnox Creek
Location0.9 MI N. JCT US 72
RouteCity Street 0
CountyMadison County
StateAlabama
Coordinates34.77, -86.74833
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating48 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length22 ft (6.7 m)
Longest span10 ft (3 m)
Deck width36 ft (11 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,850 (2024)
Projected traffic44,590 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$353,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Wall Triana Rd. over Knox Creek built?

It was built in 1919, making it 106 years old in 2025. It was reconstructed in 1936.

What condition is Wall Triana Rd. over Knox Creek 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 March 2024.

How much traffic does Wall Triana Rd. over Knox Creek carry?

About 31,850 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Wall Triana Rd. over Knox Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m) and a deck 36 ft wide.

Who owns Wall Triana Rd. over Knox Creek?

It is owned by the City or Municipal Highway Agency.