US Bridges

Nfa 1223 347887R over CSX Railroad

Good

Polk County, Tennessee · 1.9 MI W JCT SR30&SR33 · Structure no. 70S43130013

Built
1986
39 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
186 ft
3 main spans
Daily traffic
772
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1223 347887R over CSX Railroad is a prestressed concrete continuous stringer/multi-beam or girder carrying Nfa 1223 347887R over CSX Railroad in Polk County, Tennessee. It was built in 1986, so it is 39 years old, younger than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 772 vehicles a day, roughly 3% of them trucks, projected to reach 1,235 by 2042. The structure is 186 ft (56.7 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesNfa 1223 347887R
CrossesCSX Railroad
Location1.9 MI W JCT SR30&SR33
RouteCounty Highway 1223
Coordinates35.24223, -84.60004
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating47.8 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length186 ft (56.7 m)
Longest span78 ft (23.8 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic772 (2021)
Projected traffic1,235 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nfa 1223 347887R over CSX Railroad built?

It was built in 1986, making it 39 years old in 2025.

What condition is Nfa 1223 347887R over CSX Railroad in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Nfa 1223 347887R over CSX Railroad carry?

About 772 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 1223 347887R over CSX Railroad?

The structure is 186 ft (56.7 m) long with a longest span of 78 ft (23.8 m) and a deck 28 ft wide.

Who owns Nfa 1223 347887R over CSX Railroad?

It is owned by the County Highway Agency.