US Bridges

Nfa B174 over Poplar Creek

FairPosted for load

Roane County, Tennessee · In Oak Ridge · Structure no. 73037390001

Built
1950
75 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
66 ft
2 main spans
Daily traffic
30
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa B174 over Poplar Creek is a steel stringer/multi-beam or girder carrying Nfa B174 over Poplar Creek in Roane County, Tennessee. It was built in 1950, so it is 75 years old, older 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. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 1% of them trucks, projected to reach 48 by 2041. The structure is 66 ft (20.1 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNfa B174
CrossesPoplar Creek
LocationIn Oak Ridge
RouteCity Street 174
CountyRoane County
StateTennessee
Coordinates35.98258, -84.32708
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating10 US tons
Inventory rating7.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 15
Structure length66 ft (20.1 m)
Longest span31 ft (9.4 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic48 by 2041
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$404,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B174 over Poplar Creek built?

It was built in 1950, making it 75 years old in 2025.

What condition is Nfa B174 over Poplar Creek 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 March 2023.

How much traffic does Nfa B174 over Poplar Creek carry?

About 30 vehicles per day (2020 count), of which roughly 1% are trucks.

How long is Nfa B174 over Poplar Creek?

The structure is 66 ft (20.1 m) long with a longest span of 31 ft (9.4 m) and a deck 23 ft wide.

Who owns Nfa B174 over Poplar Creek?

It is owned by the City or Municipal Highway Agency.