US Bridges

County RD 429 over Trib to Grand Rive

Fair

Livingston County, Missouri · S 17 T 57 N R 24 W · Structure no. 24526

Built
1968
57 years old, rebuilt 2021
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
100
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 429 over Trib to Grand Rive is a steel stringer/multi-beam or girder carrying County RD 429 over Trib to Grand Rive in Livingston County, Missouri. It was built in 1968 and reconstructed in 2021, so it is 57 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 110 by 2044. The structure is 26 ft (7.8 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCounty RD 429
CrossesTrib to Grand Rive
LocationS 17 T 57 N R 24 W
RouteCounty Highway 506
CountyLivingston County
StateMissouri
Coordinates39.7478, -93.63147
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
Deck9 ExcellentNo problems noted.
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 inspectionJanuary 2025
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating94.2 US tons
Inventory rating56.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length26 ft (7.8 m)
Longest span20 ft (6.1 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2024)
Projected traffic110 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 429 over Trib to Grand Rive built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2021.

What condition is County RD 429 over Trib to Grand Rive 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 January 2025.

How much traffic does County RD 429 over Trib to Grand Rive carry?

About 100 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 429 over Trib to Grand Rive?

The structure is 26 ft (7.8 m) long with a longest span of 20 ft (6.1 m) and a deck 20 ft wide.

Who owns County RD 429 over Trib to Grand Rive?

It is owned by the County Highway Agency.