US Bridges

Nfa 2599 (sa 8215) over Boone Lake

FairPosted for load

Sullivan County, Tennessee · Devault Br RD · Structure no. 82025090001

Built
1952
73 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
636 ft
8 main spans
Daily traffic
1,927
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2599 (sa 8215) over Boone Lake is a steel continuous stringer/multi-beam or girder carrying Nfa 2599 (sa 8215) over Boone Lake in Sullivan County, Tennessee. It was built in 1952, so it is 73 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 1,927 vehicles a day, roughly 5% of them trucks, projected to reach 2,840 by 2042. The structure is 636 ft (194 m) long and 22 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesNfa 2599 (sa 8215)
CrossesBoone Lake
LocationDevault Br RD
RouteCounty Highway 2599
CountySullivan County
StateTennessee
Coordinates36.46555, -82.35767
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.3 US tons
Inventory rating22.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadH 15
Structure length636 ft (194 m)
Longest span77 ft (23.5 m)
Deck width22 ft (6.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,927 (2021)
Projected traffic2,840 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$2.9 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2599 (sa 8215) over Boone Lake built?

It was built in 1952, making it 73 years old in 2025.

What condition is Nfa 2599 (sa 8215) over Boone Lake 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 February 2024.

How much traffic does Nfa 2599 (sa 8215) over Boone Lake carry?

About 1,927 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Nfa 2599 (sa 8215) over Boone Lake?

The structure is 636 ft (194 m) long with a longest span of 77 ft (23.5 m) and a deck 22 ft wide.

Who owns Nfa 2599 (sa 8215) over Boone Lake?

It is owned by the County Highway Agency.