US Bridges

Nfa 1511 (sa 4803) over Blue Bank Bayou

Fair

Lake County, Tennessee · 3 MI NW of Ridgely · Structure no. 48015110001

Built
1984
41 years old
Condition
Fair
inspected May 2024
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
94
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 1511 (sa 4803) over Blue Bank Bayou is a concrete continuous culvert carrying Nfa 1511 (sa 4803) over Blue Bank Bayou in Lake County, Tennessee. It was built in 1984, so it is 41 years old, younger 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 94 vehicles a day, roughly 1% of them trucks, projected to reach 208 by 2040. The structure is 33 ft (10.2 m) long and 27 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesNfa 1511 (sa 4803)
CrossesBlue Bank Bayou
Location3 MI NW of Ridgely
RouteCounty Highway 1511
Coordinates36.28481, -89.5173
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length33 ft (10.2 m)
Longest span15 ft (4.6 m)
Deck width27 ft (8.1 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic94 (2021)
Projected traffic208 by 2040
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 1511 (sa 4803) over Blue Bank Bayou built?

It was built in 1984, making it 41 years old in 2025.

What condition is Nfa 1511 (sa 4803) over Blue Bank Bayou 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 1511 (sa 4803) over Blue Bank Bayou carry?

About 94 vehicles per day (2021 count), of which roughly 1% are trucks.

How long is Nfa 1511 (sa 4803) over Blue Bank Bayou?

The structure is 33 ft (10.2 m) long with a longest span of 15 ft (4.6 m) and a deck 27 ft wide.

Who owns Nfa 1511 (sa 4803) over Blue Bank Bayou?

It is owned by the County Highway Agency.