US Bridges

FAU 24 over Obed River

Poor

Cumberland County, Tennessee · In Crossville City Limits · Structure no. 18SR0240003

Built
1929
96 years old, rebuilt 1954
Condition
Poor
inspected February 2024
Type
Tee Beam
Concrete
Length
150 ft
4 main spans
Daily traffic
7,324
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 24 over Obed River is a concrete tee beam carrying FAU 24 over Obed River in Cumberland County, Tennessee. It was built in 1929 and reconstructed in 1954, so it is 96 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 7,324 vehicles a day, roughly 4% of them trucks, projected to reach 11,718 by 2042. The structure is 150 ft (45.7 m) long and 34 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesFAU 24
CrossesObed River
LocationIn Crossville City Limits
RouteU.S. Route 70
Coordinates35.97452, -85.04853
Functional classUrban Minor Arterial

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating30.3 US tons
Inventory rating22.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length150 ft (45.7 m)
Longest span41 ft (12.5 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,324 (2021)
Projected traffic11,718 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.3 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 24 over Obed River built?

It was built in 1929, making it 96 years old in 2025. It was reconstructed in 1954.

What condition is FAU 24 over Obed River 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 February 2024.

How much traffic does FAU 24 over Obed River carry?

About 7,324 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAU 24 over Obed River?

The structure is 150 ft (45.7 m) long with a longest span of 41 ft (12.5 m) and a deck 34 ft wide.

Who owns FAU 24 over Obed River?

It is owned by the State Highway Agency.