US Bridges

345 TH ST over Sampson CR

Fair

Gentry County, Missouri · S 36 T 63 N R 30 W · Structure no. 18831

Built
1989
36 years old, rebuilt 2005
Condition
Fair
inspected January 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
79 ft
3 main spans
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

345 TH ST over Sampson CR is a steel stringer/multi-beam or girder carrying 345 TH ST over Sampson CR in Gentry County, Missouri. It was built in 1989 and reconstructed in 2005, 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 17 by 2044. The structure is 79 ft (24.1 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries345 TH ST
CrossesSampson CR
LocationS 36 T 63 N R 30 W
RouteCounty Highway 201
CountyGentry County
StateMissouri
Coordinates40.21699, -94.22866
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans3
Design loadOther
Structure length79 ft (24.1 m)
Longest span40 ft (12.2 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic17 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$407,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 345 TH ST over Sampson CR built?

It was built in 1989, making it 36 years old in 2025. It was reconstructed in 2005.

What condition is 345 TH ST over Sampson 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 January 2023.

How much traffic does 345 TH ST over Sampson CR carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 345 TH ST over Sampson CR?

The structure is 79 ft (24.1 m) long with a longest span of 40 ft (12.2 m) and a deck 16 ft wide.

Who owns 345 TH ST over Sampson CR?

It is owned by the County Highway Agency.