US Bridges

SR 79 over Mill Creek

Good

Marshall County, Alabama · 3.5 MI N JCT US431 * SR79 · Structure no. 001485

Built
1936
89 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
21 ft
2 main spans
Daily traffic
4,974
2023 count
Owner
State
State Highway Agency

About this bridge

SR 79 over Mill Creek is a concrete culvert carrying SR 79 over Mill Creek in Marshall County, Alabama. It was built in 1936, so it is 89 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 4,974 vehicles a day, roughly 12% of them trucks, projected to reach 6,964 by 2043. The structure is 21 ft (6.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesSR 79
CrossesMill Creek
Location3.5 MI N JCT US431 * SR79
RouteState Highway 79
StateAlabama
Coordinates34.46701, -86.22841
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.9 US tons
Inventory rating52.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 15
Structure length21 ft (6.4 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,974 (2023)
Projected traffic6,964 by 2043
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$305,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 79 over Mill Creek built?

It was built in 1936, making it 89 years old in 2025.

What condition is SR 79 over Mill Creek 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 December 2024.

How much traffic does SR 79 over Mill Creek carry?

About 4,974 vehicles per day (2023 count), of which roughly 12% are trucks.

How long is SR 79 over Mill Creek?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3 m).

Who owns SR 79 over Mill Creek?

It is owned by the State Highway Agency.