US Bridges

SR 3 over Tn River & CSX RR

Fair

Morgan County, Alabama · 0.1 M N JCT SR 3 & SR 20 · Structure no. 007320

Built
1961
64 years old, rebuilt 1997
Condition
Fair
inspected September 2023
Type
Truss - Thru
Steel Continuous
Length
2,502 ft
3 main spans
Daily traffic
20,045
2023 count
Owner
State
State Highway Agency

About this bridge

SR 3 over Tn River & CSX RR is a steel continuous truss - thru carrying SR 3 over Tn River & CSX RR in Morgan County, Alabama. It was built in 1961 and reconstructed in 1997, so it is 64 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 20,045 vehicles a day, roughly 7% of them trucks, projected to reach 2,000 by 2033. The structure is 2,502 ft (762.6 m) long and 33 ft wide.

Location

Open in Google Maps
CarriesSR 3
CrossesTn River & CSX RR
Location0.1 M N JCT SR 3 & SR 20
RouteU.S. Route 31
CountyMorgan County
StateAlabama
Coordinates34.61333, -86.97333
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.
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 protection7 GoodSome minor problems.
Last inspectionSeptember 2023
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating44.8 US tons
Inventory rating26.8 US tons

Structure

Structure typeTruss - Thru
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+20 approach)
Design loadHS 20
Structure length2,502 ft (762.6 m)
Longest span360 ft (109.7 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.2 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic20,045 (2023)
Projected traffic2,000 by 2033
Trucks7%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed—
TollOn a free road
National Highway SystemYes

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$19 million (2025 estimate)
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was SR 3 over Tn River & CSX RR built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1997.

What condition is SR 3 over Tn River & CSX RR 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 September 2023.

How much traffic does SR 3 over Tn River & CSX RR carry?

About 20,045 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is SR 3 over Tn River & CSX RR?

The structure is 2,502 ft (762.6 m) long with a longest span of 360 ft (109.7 m) and a deck 33 ft wide.

Who owns SR 3 over Tn River & CSX RR?

It is owned by the State Highway Agency.