US Bridges

Lagrange RD over Isbell Branch

Fair

Colbert County, Alabama · Lagrange S of Coburn Mtn · Structure no. 005254

Built
1955
70 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
750
2006 count
Owner
County
County Highway Agency

About this bridge

Lagrange RD over Isbell Branch is a concrete culvert carrying Lagrange RD over Isbell Branch in Colbert County, Alabama. It was built in 1955, so it is 70 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 750 vehicles a day, roughly 10% of them trucks, projected to reach 1,000 by 2038. The structure is 24 ft (7.3 m) long and 40 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesLagrange RD
CrossesIsbell Branch
LocationLagrange S of Coburn Mtn
RouteCounty Highway 57
CountyColbert County
StateAlabama
Coordinates34.63416, -87.59697
Functional classRural Major Collector

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 protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating46.7 US tons
Inventory rating28 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span11 ft (3.4 m)
Deck width40 ft (12.2 m)
Roadway width38 ft (11.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2006)
Projected traffic1,000 by 2038
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$347,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lagrange RD over Isbell Branch built?

It was built in 1955, making it 70 years old in 2025.

What condition is Lagrange RD over Isbell Branch 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 April 2024.

How much traffic does Lagrange RD over Isbell Branch carry?

About 750 vehicles per day (2006 count), of which roughly 10% are trucks.

How long is Lagrange RD over Isbell Branch?

The structure is 24 ft (7.3 m) long with a longest span of 11 ft (3.4 m) and a deck 40 ft wide.

Who owns Lagrange RD over Isbell Branch?

It is owned by the County Highway Agency.