US Bridges

Cosby Campground a over Rock Creek

Poor

Cocke County, Tennessee · 1.7 Miles South from Tn R · Structure no. 5460186P0000000

Built
1970
55 years old
Condition
Poor
inspected May 2024
Type
Culvert
Steel
Length
29 ft
2 main spans
Daily traffic
1
2019 count
Owner
Federal
National Park Service

About this bridge

Cosby Campground a over Rock Creek is a steel culvert carrying Cosby Campground a over Rock Creek in Cocke County, Tennessee. It was built in 1970, so it is 55 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1 vehicles a day, projected to reach 2 by 2039. The structure is 29 ft (8.7 m) long.

Location

Open in Google Maps
CarriesCosby Campground a
CrossesRock Creek
Location1.7 Miles South from Tn R
RouteFederal Lands Road 21
CountyCocke County
StateTennessee
Coordinates35.76128, -83.21033
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating65 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length29 ft (8.7 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1 (2019)
Projected traffic2 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$255,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Cosby Campground a over Rock Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Cosby Campground a over Rock Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in May 2024.

How much traffic does Cosby Campground a over Rock Creek carry?

About 1 vehicles per day (2019 count).

How long is Cosby Campground a over Rock Creek?

The structure is 29 ft (8.7 m) long with a longest span of 13 ft (4 m).

Who owns Cosby Campground a over Rock Creek?

It is owned by the National Park Service.