US Bridges

20 TH Street over Tanyhard Creek

Good

Walker County, Alabama · 20 TH Street * 8th Ave · Structure no. 013563

Built
1985
40 years old
Condition
Good
inspected December 2024
Type
Culvert
Concrete
Length
50 ft
4 main spans
Daily traffic
8,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

20 TH Street over Tanyhard Creek is a concrete culvert carrying 20 TH Street over Tanyhard Creek in Walker County, Alabama. It was built in 1985, so it is 40 years old, younger 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 8,000 vehicles a day, roughly 10% of them trucks, projected to reach 16,000 by 2044. The structure is 50 ft (15.2 m) long and 47 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries20 TH Street
CrossesTanyhard Creek
Location20 TH Street * 8th Ave
RouteCity Street 0
StateAlabama
Coordinates33.83, -87.285
Functional classUrban Local

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 protection7 GoodSome minor problems.
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
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating98 US tons
Inventory rating69.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length50 ft (15.2 m)
Longest span10 ft (3 m)
Deck width47 ft (14.4 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,000 (2024)
Projected traffic16,000 by 2044
Trucks10%
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$755,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 20 TH Street over Tanyhard Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is 20 TH Street over Tanyhard 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 20 TH Street over Tanyhard Creek carry?

About 8,000 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 20 TH Street over Tanyhard Creek?

The structure is 50 ft (15.2 m) long with a longest span of 10 ft (3 m) and a deck 47 ft wide.

Who owns 20 TH Street over Tanyhard Creek?

It is owned by the City or Municipal Highway Agency.