US Bridges

CSX RR 347589R over Topside Rd. / CSX RR

Fair

Knox County, Tennessee · W Off US129-N of Co. Line · Structure no. 470B5220001

Built
1990
35 years old
Condition
Fair
inspected April 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
129 ft
3 main spans
Daily traffic
560
2020 count
Owner
County
County Highway Agency

About this bridge

CSX RR 347589R over Topside Rd. / CSX RR is a prestressed concrete continuous box beam or girders - single or spread carrying CSX RR 347589R over Topside Rd. / CSX RR in Knox County, Tennessee. It was built in 1990, so it is 35 years old, younger than the Tennessee average of 47.4 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 560 vehicles a day, roughly 2% of them trucks, projected to reach 896 by 2040. The structure is 129 ft (39.3 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCSX RR 347589R
CrossesTopside Rd. / CSX RR
LocationW Off US129-N of Co. Line
RouteCounty Highway 522
CountyKnox County
StateTennessee
Coordinates35.87622, -83.96
Functional classUrban Local

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.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.4 US tons
Inventory rating33.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span45 ft (13.7 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2020)
Projected traffic896 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed5 mi (8 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 CSX RR 347589R over Topside Rd. / CSX RR built?

It was built in 1990, making it 35 years old in 2025.

What condition is CSX RR 347589R over Topside Rd. / 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 April 2024.

How much traffic does CSX RR 347589R over Topside Rd. / CSX RR carry?

About 560 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is CSX RR 347589R over Topside Rd. / CSX RR?

The structure is 129 ft (39.3 m) long with a longest span of 45 ft (13.7 m) and a deck 26 ft wide.

Who owns CSX RR 347589R over Topside Rd. / CSX RR?

It is owned by the County Highway Agency.