US Bridges

Nfa C891 over Nine Mile Branch

Poor

Hamilton County, Tennessee · .1 MI West of US 27 · Structure no. 330C8910003

Built
1992
33 years old
Condition
Poor
inspected January 2024
Type
Culvert
Concrete Continuous
Length
37 ft
2 main spans
Daily traffic
2,310
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nfa C891 over Nine Mile Branch is a concrete continuous culvert carrying Nfa C891 over Nine Mile Branch in Hamilton County, Tennessee. It was built in 1992, so it is 33 years old, younger 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 2,310 vehicles a day, roughly 2% of them trucks, projected to reach 3,696 by 2040. The structure is 37 ft (11.3 m) long and 31 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesNfa C891
CrossesNine Mile Branch
Location.1 MI West of US 27
RouteCity Street 891
CountyHamilton County
StateTennessee
Coordinates35.17275, -85.25843
Functional classUrban Local

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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating98.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span12 ft (3.7 m)
Deck width31 ft (9.4 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,310 (2020)
Projected traffic3,696 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 C891 over Nine Mile Branch built?

It was built in 1992, making it 33 years old in 2025.

What condition is Nfa C891 over Nine Mile Branch 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 January 2024.

How much traffic does Nfa C891 over Nine Mile Branch carry?

About 2,310 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Nfa C891 over Nine Mile Branch?

The structure is 37 ft (11.3 m) long with a longest span of 12 ft (3.7 m) and a deck 31 ft wide.

Who owns Nfa C891 over Nine Mile Branch?

It is owned by the City or Municipal Highway Agency.