US Bridges

SR 20 over Mallard Creek

Fair

Lawrence County, Alabama · 4.7 M E JCT SR 20 & SR 33 · Structure no. 020320

Built
2016
9 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
195 ft
1 main span
Daily traffic
8,130
2024 count
Owner
State
State Highway Agency

About this bridge

SR 20 over Mallard Creek is a prestressed concrete stringer/multi-beam or girder carrying SR 20 over Mallard Creek in Lawrence County, Alabama. It was built in 2016, so it is 9 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 6 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 8,130 vehicles a day, roughly 17% of them trucks, projected to reach 13,335 by 2033. The structure is 195 ft (59.4 m) long and 43 ft wide.

Location

Open in Google Maps
CarriesSR 20
CrossesMallard Creek
Location4.7 M E JCT SR 20 & SR 33
RouteState Highway 20
CountyLawrence County
StateAlabama
Coordinates34.64897, -87.20719
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.4 US tons
Inventory rating52.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadHS 20
Structure length195 ft (59.4 m)
Longest span65 ft (19.8 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,130 (2024)
Projected traffic13,335 by 2033
Trucks17%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$2.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over Mallard Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is SR 20 over Mallard 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 December 2024.

How much traffic does SR 20 over Mallard Creek carry?

About 8,130 vehicles per day (2024 count), of which roughly 17% are trucks.

How long is SR 20 over Mallard Creek?

The structure is 195 ft (59.4 m) long with a longest span of 65 ft (19.8 m) and a deck 43 ft wide.

Who owns SR 20 over Mallard Creek?

It is owned by the State Highway Agency.