US Bridges

County RD 242 over Br of Salt Rvr

Fair

Knox County, Missouri · S 10 T 61 N R 13 W · Structure no. 19962

Built
1989
36 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 242 over Br of Salt Rvr is a steel stringer/multi-beam or girder carrying County RD 242 over Br of Salt Rvr in Knox County, Missouri. It was built in 1989, so it is 36 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 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 31 by 2044. The structure is 36 ft (11 m) long and 21 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty RD 242
CrossesBr of Salt Rvr
LocationS 10 T 61 N R 13 W
RouteCounty Highway 242
CountyKnox County
StateMissouri
Coordinates40.09533, -92.34225
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadOther
Structure length36 ft (11 m)
Longest span33 ft (10.1 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic31 by 2044
Trucks10%
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 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 242 over Br of Salt Rvr built?

It was built in 1989, making it 36 years old in 2025.

What condition is County RD 242 over Br of Salt Rvr 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 242 over Br of Salt Rvr carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 242 over Br of Salt Rvr?

The structure is 36 ft (11 m) long with a longest span of 33 ft (10.1 m) and a deck 21 ft wide.

Who owns County RD 242 over Br of Salt Rvr?

It is owned by the County Highway Agency.