US Bridges

Nfa B470 over Collins Branch

Fair

McMinn County, Tennessee · Near Meigs County Line · Structure no. 54SR3050013

Built
1956
69 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete Continuous
Length
33 ft
3 main spans
Daily traffic
30
2020 count
Owner
County
County Highway Agency

About this bridge

Nfa B470 over Collins Branch is a concrete continuous culvert carrying Nfa B470 over Collins Branch in McMinn County, Tennessee. It was built in 1956, so it is 69 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 30 vehicles a day, roughly 3% of them trucks, projected to reach 48 by 2042. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesNfa B470
CrossesCollins Branch
LocationNear Meigs County Line
RouteState Highway 470
CountyMcMinn County
StateTennessee
Coordinates35.58365, -84.673
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 15
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2020)
Projected traffic48 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa B470 over Collins Branch built?

It was built in 1956, making it 69 years old in 2025.

What condition is Nfa B470 over Collins Branch 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 B470 over Collins Branch carry?

About 30 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is Nfa B470 over Collins Branch?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m).

Who owns Nfa B470 over Collins Branch?

It is owned by the County Highway Agency.