US Bridges

SR 3 over Tn River & CSX RR

Fair

Morgan County, Alabama · 0.1 M N JCT SR 3 & SR 20 · Structure no. 016368

Built
1996
29 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
2,595 ft
1 main span
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 stringer/multi-beam or girder carrying SR 3 over Tn River & CSX RR in Morgan County, Alabama. It was built in 1996, so it is 29 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 20,045 vehicles a day, roughly 7% of them trucks, projected to reach 25,749 by 2033. The structure is 2,595 ft (791 m) long and 43 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
Coordinates34.61107, -86.97473
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.9 US tons
Inventory rating36.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1 (+13 approach)
Design loadHS 20
Structure length2,595 ft (791 m)
Longest span360 ft (109.7 m)
Deck width43 ft (13.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,045 (2023)
Projected traffic25,749 by 2033
Trucks7%
Lanes on structure3
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 proposedNone recorded
Estimated improvement cost$25.7 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 1996, making it 29 years old in 2025.

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 May 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 2,595 ft (791 m) long with a longest span of 360 ft (109.7 m) and a deck 43 ft wide.

Who owns SR 3 over Tn River & CSX RR?

It is owned by the State Highway Agency.