US Bridges

County RD 430 over Littleby CR

Fair

Audrain County, Missouri · S 2 T 51 N R 8 W · Structure no. 22662

Built
1998
27 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
180 ft
3 main spans
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 430 over Littleby CR is a prestressed concrete continuous stringer/multi-beam or girder carrying County RD 430 over Littleby CR in Audrain County, Missouri. It was built in 1998, so it is 27 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2043. The structure is 180 ft (54.9 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCounty RD 430
CrossesLittleby CR
LocationS 2 T 51 N R 8 W
RouteCounty Highway 368
CountyAudrain County
StateMissouri
Coordinates39.23692, -91.76419
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length180 ft (54.9 m)
Longest span72 ft (21.9 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic44 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 430 over Littleby CR built?

It was built in 1998, making it 27 years old in 2025.

What condition is County RD 430 over Littleby 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 April 2023.

How much traffic does County RD 430 over Littleby CR carry?

About 35 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 430 over Littleby CR?

The structure is 180 ft (54.9 m) long with a longest span of 72 ft (21.9 m) and a deck 26 ft wide.

Who owns County RD 430 over Littleby CR?

It is owned by the County Highway Agency.