US Bridges

Plum Trail over Trib of Big Rock C

Good

Worth County, Missouri · S 36 T 65 N R 31 W · Structure no. 17554

Built
1991
34 years old
Condition
Good
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

Plum Trail over Trib of Big Rock C is a steel stringer/multi-beam or girder carrying Plum Trail over Trib of Big Rock C in Worth County, Missouri. It was built in 1991, so it is 34 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2044. The structure is 80 ft (24.4 m) long and 18 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesPlum Trail
CrossesTrib of Big Rock C
LocationS 36 T 65 N R 31 W
RouteCounty Highway 156
Coordinates40.39352, -94.33311
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating61.5 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length80 ft (24.4 m)
Longest span79 ft (24.1 m)
Deck width18 ft (5.5 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic23 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Plum Trail over Trib of Big Rock C built?

It was built in 1991, making it 34 years old in 2025.

What condition is Plum Trail over Trib of Big Rock C in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2024.

How much traffic does Plum Trail over Trib of Big Rock C carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Plum Trail over Trib of Big Rock C?

The structure is 80 ft (24.4 m) long with a longest span of 79 ft (24.1 m) and a deck 18 ft wide.

Who owns Plum Trail over Trib of Big Rock C?

It is owned by the County Highway Agency.