US Bridges

Nfa 2136 (sa 3108) over Mill Creek

Fair

Grundy County, Tennessee · 1 M NE of Palmer · Structure no. 31021360001

Built
1962
63 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete
Length
86 ft
3 main spans
Daily traffic
168
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 2136 (sa 3108) over Mill Creek is a concrete tee beam carrying Nfa 2136 (sa 3108) over Mill Creek in Grundy County, Tennessee. It was built in 1962, so it is 63 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 168 vehicles a day, roughly 3% of them trucks, projected to reach 256 by 2040. The structure is 86 ft (26.1 m) long and 34 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

CarriesNfa 2136 (sa 3108)
CrossesMill Creek
Location1 M NE of Palmer
RouteCounty Highway 2136
Coordinates35.37293, -85.55438
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length86 ft (26.1 m)
Longest span29 ft (8.7 m)
Deck width34 ft (10.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic168 (2021)
Projected traffic256 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 2136 (sa 3108) over Mill Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Nfa 2136 (sa 3108) over Mill Creek 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 May 2024.

How much traffic does Nfa 2136 (sa 3108) over Mill Creek carry?

About 168 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 2136 (sa 3108) over Mill Creek?

The structure is 86 ft (26.1 m) long with a longest span of 29 ft (8.7 m) and a deck 34 ft wide.

Who owns Nfa 2136 (sa 3108) over Mill Creek?

It is owned by the County Highway Agency.