US Bridges

SR-477 over Blackburn Creek

Good

Jackson County, Tennessee · 6MI East of SR56 · Structure no. 44014100001

Built
1960
65 years old
Condition
Good
inspected July 2023
Type
Tee Beam
Concrete Continuous
Length
210 ft
3 main spans
Daily traffic
1,586
2021 count
Owner
State
State Highway Agency

About this bridge

SR-477 over Blackburn Creek is a concrete continuous tee beam carrying SR-477 over Blackburn Creek in Jackson County, Tennessee. It was built in 1960, so it is 65 years old, older 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 1,586 vehicles a day, roughly 5% of them trucks, projected to reach 2,664 by 2041. The structure is 210 ft (63.9 m) long and 29 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesSR-477
CrossesBlackburn Creek
Location6MI East of SR56
RouteState Highway 477
CountyJackson County
StateTennessee
Coordinates36.2504, -85.56478
Functional classRural Major 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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 alignment6: Equal to present minimum criteria
Operating rating52.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3 (+2 approach)
Design loadH 15
Structure length210 ft (63.9 m)
Longest span60 ft (18.3 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,586 (2021)
Projected traffic2,664 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$596,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SR-477 over Blackburn Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is SR-477 over Blackburn Creek 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 July 2023.

How much traffic does SR-477 over Blackburn Creek carry?

About 1,586 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is SR-477 over Blackburn Creek?

The structure is 210 ft (63.9 m) long with a longest span of 60 ft (18.3 m) and a deck 29 ft wide.

Who owns SR-477 over Blackburn Creek?

It is owned by the State Highway Agency.