US Bridges

County Rt 21 over Double Creek

FairPosted for load

Marengo County, Alabama · 4.3 MI NE Jefferson · Structure no. 010833

Built
1935
90 years old, rebuilt 1973
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
400
1988 count
Owner
County
County Highway Agency

About this bridge

County Rt 21 over Double Creek is a steel stringer/multi-beam or girder carrying County Rt 21 over Double Creek in Marengo County, Alabama. It was built in 1935 and reconstructed in 1973, so it is 90 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. Its operating status is: posted for load restriction.

It carries about 400 vehicles a day, roughly 10% of them trucks, projected to reach 470 by 2040. The structure is 40 ft (12.2 m) long and 20 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

CarriesCounty Rt 21
CrossesDouble Creek
Location4.3 MI NE Jefferson
RouteCounty Highway 21
StateAlabama
Coordinates32.43242, -87.86517
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating26.5 US tons
Inventory rating15.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (1988)
Projected traffic470 by 2040
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$285,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Rt 21 over Double Creek built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1973.

What condition is County Rt 21 over Double Creek 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 January 2025.

How much traffic does County Rt 21 over Double Creek carry?

About 400 vehicles per day (1988 count), of which roughly 10% are trucks.

How long is County Rt 21 over Double Creek?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 20 ft wide.

Who owns County Rt 21 over Double Creek?

It is owned by the County Highway Agency.