US Bridges

504 over Mariot Creek

Fair

Cullman County, Alabama · CR 504 · Structure no. 007574

Built
1962
63 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
52 ft
5 main spans
Daily traffic
30
1991 count
Owner
County
County Highway Agency

About this bridge

504 over Mariot Creek is a concrete culvert carrying 504 over Mariot Creek in Cullman County, Alabama. It was built in 1962, so it is 63 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 30 vehicles a day, projected to reach 45 by 2036. The structure is 52 ft (15.8 m) long. If it were closed, the detour would be 6.2 mi (10 km).

Location

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Carries504
CrossesMariot Creek
LocationCR 504
RouteCounty Highway 0
CountyCullman County
StateAlabama
Coordinates33.98191, -86.85809
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.4 US tons
Inventory rating29 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadH 15
Structure length52 ft (15.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (1991)
Projected traffic45 by 2036
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 504 over Mariot Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is 504 over Mariot 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 November 2024.

How much traffic does 504 over Mariot Creek carry?

About 30 vehicles per day (1991 count).

How long is 504 over Mariot Creek?

The structure is 52 ft (15.8 m) long with a longest span of 14 ft (4.3 m).

Who owns 504 over Mariot Creek?

It is owned by the County Highway Agency.