US Bridges

FAU 4470 (sa 3305) over North Chickamauga Creek

PoorPosted for load

Hamilton County, Tennessee · .8 MI East of SR 153 · Structure no. 330C9580001

Built
1955
70 years old
Condition
Poor
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
160 ft
3 main spans
Daily traffic
4,488
2021 count
Owner
County
County Highway Agency

About this bridge

FAU 4470 (sa 3305) over North Chickamauga Creek is a steel continuous stringer/multi-beam or girder carrying FAU 4470 (sa 3305) over North Chickamauga Creek in Hamilton County, Tennessee. It was built in 1955, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 4,488 vehicles a day, roughly 4% of them trucks, projected to reach 6,221 by 2041. The structure is 160 ft (48.8 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesFAU 4470 (sa 3305)
CrossesNorth Chickamauga Creek
Location.8 MI East of SR 153
RouteCity Street 4470
CountyHamilton County
StateTennessee
Coordinates35.17485, -85.228
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating15.8 US tons
Inventory rating12.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length160 ft (48.8 m)
Longest span60 ft (18.3 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,488 (2021)
Projected traffic6,221 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$677,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAU 4470 (sa 3305) over North Chickamauga Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is FAU 4470 (sa 3305) over North Chickamauga 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 2023.

How much traffic does FAU 4470 (sa 3305) over North Chickamauga Creek carry?

About 4,488 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is FAU 4470 (sa 3305) over North Chickamauga Creek?

The structure is 160 ft (48.8 m) long with a longest span of 60 ft (18.3 m) and a deck 30 ft wide.

Who owns FAU 4470 (sa 3305) over North Chickamauga Creek?

It is owned by the County Highway Agency.