US Bridges

SR 20 over SR 3

Fair

Limestone County, Alabama · JCT SR 20 & SR 3 · Structure no. 008733

Built
1965
60 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
328 ft
5 main spans
Daily traffic
19,316
2024 count
Owner
State
State Highway Agency

About this bridge

SR 20 over SR 3 is a steel stringer/multi-beam or girder carrying SR 20 over SR 3 in Limestone County, Alabama. It was built in 1965, so it is 60 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 19,316 vehicles a day, roughly 9% of them trucks, projected to reach 75,721 by 2036. The structure is 328 ft (100 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesSR 20
CrossesSR 3
LocationJCT SR 20 & SR 3
RouteState Highway 20
CountyLimestone County
StateAlabama
Coordinates34.6293, -86.95267
Functional classUrban Other Principal Arterial

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.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment6: Equal to present minimum criteria
Operating rating53 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length328 ft (100 m)
Longest span91 ft (27.7 m)
Deck width33 ft (10.2 m)
Roadway width28 ft (8.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,316 (2024)
Projected traffic75,721 by 2036
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$2.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 20 over SR 3 built?

It was built in 1965, making it 60 years old in 2025.

What condition is SR 20 over SR 3 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 SR 3 carry?

About 19,316 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is SR 20 over SR 3?

The structure is 328 ft (100 m) long with a longest span of 91 ft (27.7 m) and a deck 33 ft wide.

Who owns SR 20 over SR 3?

It is owned by the State Highway Agency.