US Bridges

FAU 3631 (sa 3308) over SR 29

FairPosted for load

Hamilton County, Tennessee · 2.41 Mi. N of SR-153 Jct. · Structure no. 33SR0290015

Built
1977
48 years old
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
228 ft
2 main spans
Daily traffic
3,768
2021 count
Owner
State
State Highway Agency

About this bridge

FAU 3631 (sa 3308) over SR 29 is a concrete continuous box beam or girders - single or spread carrying FAU 3631 (sa 3308) over SR 29 in Hamilton County, Tennessee. It was built in 1977, so it is 48 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 3,768 vehicles a day, roughly 4% of them trucks, projected to reach 6,059 by 2041. The structure is 228 ft (69.5 m) long and 50 ft wide. If it were closed, the detour would be 7.5 mi (12 km).

Location

Open in Google Maps
CarriesFAU 3631 (sa 3308)
CrossesSR 29
Location2.41 Mi. N of SR-153 Jct.
RouteCity Street 3631
CountyHamilton County
StateTennessee
Coordinates35.21325, -85.21795
Functional classUrban Minor Arterial

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.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length228 ft (69.5 m)
Longest span116 ft (35.4 m)
Deck width50 ft (15.2 m)
Roadway width47 ft (14.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,768 (2021)
Projected traffic6,059 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed7.5 mi (12 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FAU 3631 (sa 3308) over SR 29 built?

It was built in 1977, making it 48 years old in 2025.

What condition is FAU 3631 (sa 3308) over SR 29 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 November 2024.

How much traffic does FAU 3631 (sa 3308) over SR 29 carry?

About 3,768 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAU 3631 (sa 3308) over SR 29?

The structure is 228 ft (69.5 m) long with a longest span of 116 ft (35.4 m) and a deck 50 ft wide.

Who owns FAU 3631 (sa 3308) over SR 29?

It is owned by the State Highway Agency.