US Bridges

Timberline Trail over Timberline Lake

Good

Shelby County, Alabama · Timberline Subdivision · Structure no. 020154

Built
2004
21 years old
Condition
Good
inspected September 2024
Type
Culvert
Concrete
Length
46 ft
5 main spans
Daily traffic
500
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Timberline Trail over Timberline Lake is a concrete culvert carrying Timberline Trail over Timberline Lake in Shelby County, Alabama. It was built in 2004, so it is 21 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 500 vehicles a day, projected to reach 700 by 2044. The structure is 46 ft (14 m) long. If it were closed, the detour would be 123.7 mi (199 km).

Location

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CarriesTimberline Trail
CrossesTimberline Lake
LocationTimberline Subdivision
RouteCity Street 0
CountyShelby County
StateAlabama
Coordinates33.09892, -86.73475
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 protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionSeptember 2024
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 rating47.3 US tons
Inventory rating28.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans5
Design loadHS 20
Structure length46 ft (14 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2024)
Projected traffic700 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$950,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Timberline Trail over Timberline Lake built?

It was built in 2004, making it 21 years old in 2025.

What condition is Timberline Trail over Timberline Lake 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 September 2024.

How much traffic does Timberline Trail over Timberline Lake carry?

About 500 vehicles per day (2024 count).

How long is Timberline Trail over Timberline Lake?

The structure is 46 ft (14 m) long with a longest span of 8 ft (2.4 m).

Who owns Timberline Trail over Timberline Lake?

It is owned by the City or Municipal Highway Agency.