US Bridges

Nfa A390 over Oostanula Creek

Fair

McMinn County, Tennessee · 5MI East of US11 · Structure no. 540A3900001

Built
1973
52 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
81 ft
2 main spans
Daily traffic
940
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa A390 over Oostanula Creek is a steel continuous stringer/multi-beam or girder carrying Nfa A390 over Oostanula Creek in McMinn County, Tennessee. It was built in 1973, so it is 52 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.

It carries about 940 vehicles a day, roughly 2% of them trucks, projected to reach 1,504 by 2042. The structure is 81 ft (24.7 m) long and 25 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNfa A390
CrossesOostanula Creek
Location5MI East of US11
RouteCounty Highway 390
CountyMcMinn County
StateTennessee
Coordinates35.36792, -84.64493
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length81 ft (24.7 m)
Longest span39 ft (11.9 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic940 (2020)
Projected traffic1,504 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$229,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa A390 over Oostanula Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Nfa A390 over Oostanula 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 September 2023.

How much traffic does Nfa A390 over Oostanula Creek carry?

About 940 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa A390 over Oostanula Creek?

The structure is 81 ft (24.7 m) long with a longest span of 39 ft (11.9 m) and a deck 25 ft wide.

Who owns Nfa A390 over Oostanula Creek?

It is owned by the County Highway Agency.