US Bridges

Al - 75 over Blackburn Fork Ck

Fair

Blount County, Alabama · .8 Mi. So. CO RD 15 · Structure no. 009751

Built
1968
57 years old, rebuilt 1994
Condition
Fair
inspected March 2023
Type
Culvert
Concrete
Length
41 ft
3 main spans
Daily traffic
8,210
2023 count
Owner
State
State Highway Agency

About this bridge

Al - 75 over Blackburn Fork Ck is a concrete culvert carrying Al - 75 over Blackburn Fork Ck in Blount County, Alabama. It was built in 1968 and reconstructed in 1994, 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 8,210 vehicles a day, roughly 7% of them trucks, projected to reach 10,567 by 2043. The structure is 41 ft (12.5 m) long. If it were closed, the detour would be 13 mi (21 km).

CarriesAl - 75
CrossesBlackburn Fork Ck
Location.8 Mi. So. CO RD 15
RouteState Highway 75
StateAlabama
Coordinates33.85111, -86.5675
Functional classRural Minor Arterial

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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating98 US tons
Inventory rating98 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadH 15
Structure length41 ft (12.5 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,210 (2023)
Projected traffic10,567 by 2043
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

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$3 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Al - 75 over Blackburn Fork Ck built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1994.

What condition is Al - 75 over Blackburn Fork Ck 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 2023.

How much traffic does Al - 75 over Blackburn Fork Ck carry?

About 8,210 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Al - 75 over Blackburn Fork Ck?

The structure is 41 ft (12.5 m) long with a longest span of 12 ft (3.7 m).

Who owns Al - 75 over Blackburn Fork Ck?

It is owned by the State Highway Agency.