US Bridges

County RD 293 over Troublesome CR

Fair

Knox County, Missouri · S 5 T 61 N R 10 W · Structure no. 21170

Built
1987
38 years old
Condition
Fair
inspected August 2023
Type
Girder and Floorbeam System
Steel
Length
67 ft
1 main span
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 293 over Troublesome CR is a steel girder and floorbeam system carrying County RD 293 over Troublesome CR in Knox County, Missouri. It was built in 1987, so it is 38 years old, younger 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 5 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 63 by 2044. The structure is 67 ft (20.4 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCounty RD 293
CrossesTroublesome CR
LocationS 5 T 61 N R 10 W
RouteCounty Highway 293
CountyKnox County
StateMissouri
Coordinates40.11981, -92.04375
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating38.7 US tons
Inventory rating15.9 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadOther
Structure length67 ft (20.4 m)
Longest span64 ft (19.5 m)
Deck width27 ft (8.3 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic63 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County RD 293 over Troublesome CR built?

It was built in 1987, making it 38 years old in 2025.

What condition is County RD 293 over Troublesome CR 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 August 2023.

How much traffic does County RD 293 over Troublesome CR carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 293 over Troublesome CR?

The structure is 67 ft (20.4 m) long with a longest span of 64 ft (19.5 m) and a deck 27 ft wide.

Who owns County RD 293 over Troublesome CR?

It is owned by the County Highway Agency.