US Bridges

Rt Tt S over Long Br

Fair

Knox County, Missouri · S 22 T 61 N R 11 W · Structure no. 6707

Built
1956
69 years old
Condition
Fair
inspected November 2023
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
99
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Tt S over Long Br is a concrete continuous culvert carrying Rt Tt S over Long Br in Knox County, Missouri. It was built in 1956, so it is 69 years old, older than the Missouri average of 45.1 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 99 vehicles a day, roughly 16% of them trucks, projected to reach 144 by 2044. The structure is 25 ft (7.5 m) long and 27 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesRt Tt S
CrossesLong Br
LocationS 22 T 61 N R 11 W
RouteState Highway 0TT
CountyKnox County
StateMissouri
Coordinates40.06708, -92.10765
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating37.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 10
Structure length25 ft (7.5 m)
Longest span12 ft (3.7 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic99 (2024)
Projected traffic144 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt Tt S over Long Br built?

It was built in 1956, making it 69 years old in 2025.

What condition is Rt Tt S over Long Br 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 Rt Tt S over Long Br carry?

About 99 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is Rt Tt S over Long Br?

The structure is 25 ft (7.5 m) long with a longest span of 12 ft (3.7 m) and a deck 27 ft wide.

Who owns Rt Tt S over Long Br?

It is owned by the State Highway Agency.