US Bridges

FAP 33 over Mill Branch

Fair

Knox County, Tennessee · 1.4 M NE of SR131 · Structure no. 47SR0330033

Built
1934
91 years old, rebuilt 1963
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
31 ft
2 main spans
Daily traffic
17,075
2021 count
Owner
State
State Highway Agency

About this bridge

FAP 33 over Mill Branch is a concrete continuous culvert carrying FAP 33 over Mill Branch in Knox County, Tennessee. It was built in 1934 and reconstructed in 1963, so it is 91 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.

It carries about 17,075 vehicles a day, roughly 9% of them trucks, projected to reach 24,163 by 2041. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesFAP 33
CrossesMill Branch
Location1.4 M NE of SR131
RouteState Highway 33
CountyKnox County
StateTennessee
Coordinates36.09087, -83.92063
Functional classUrban Other Principal 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating39.7 US tons
Inventory rating26.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17,075 (2021)
Projected traffic24,163 by 2041
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$422,000 (2021 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was FAP 33 over Mill Branch built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 1963.

What condition is FAP 33 over Mill Branch 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 2023.

How much traffic does FAP 33 over Mill Branch carry?

About 17,075 vehicles per day (2021 count), of which roughly 9% are trucks.

How long is FAP 33 over Mill Branch?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m).

Who owns FAP 33 over Mill Branch?

It is owned by the State Highway Agency.