US Bridges

River RD over Donegan Slough-Mckiernan

Fair

Colbert County, Alabama · River RD Donegan Slough · Structure no. 013648

Built
1985
40 years old
Condition
Fair
inspected February 2025
Type
Channel Beam
Concrete
Length
102 ft
3 main spans
Daily traffic
3,775
2006 count
Owner
County
County Highway Agency

About this bridge

River RD over Donegan Slough-Mckiernan is a concrete channel beam carrying River RD over Donegan Slough-Mckiernan in Colbert 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 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 3,775 vehicles a day, roughly 10% of them trucks, projected to reach 5,650 by 2045. The structure is 102 ft (31.1 m) long and 37 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRiver RD
CrossesDonegan Slough-Mckiernan
LocationRiver RD Donegan Slough
RouteCounty Highway 40
CountyColbert County
StateAlabama
Coordinates34.78607, -87.54079
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.2 US tons
Inventory rating48.3 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length102 ft (31.1 m)
Longest span34 ft (10.4 m)
Deck width37 ft (11.4 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,775 (2006)
Projected traffic5,650 by 2045
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedNone recorded
Estimated improvement cost$1.1 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was River RD over Donegan Slough-Mckiernan built?

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

What condition is River RD over Donegan Slough-Mckiernan 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 February 2025.

How much traffic does River RD over Donegan Slough-Mckiernan carry?

About 3,775 vehicles per day (2006 count), of which roughly 10% are trucks.

How long is River RD over Donegan Slough-Mckiernan?

The structure is 102 ft (31.1 m) long with a longest span of 34 ft (10.4 m) and a deck 37 ft wide.

Who owns River RD over Donegan Slough-Mckiernan?

It is owned by the County Highway Agency.