US Bridges

3rd ST over Trib to Thompson R

Good

Grundy County, Missouri · S 18 T 61 N R 24 W · Structure no. 31697

Built
2008
17 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
327 ft
5 main spans
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

3rd ST over Trib to Thompson R is a steel stringer/multi-beam or girder carrying 3rd ST over Trib to Thompson R in Grundy County, Missouri. It was built in 2008, so it is 17 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 46 by 2044. The structure is 327 ft (99.6 m) long and 19 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Carries3rd ST
CrossesTrib to Thompson R
LocationS 18 T 61 N R 24 W
RouteCounty Highway 397
Coordinates40.07978, -93.63808
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.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83.3 US tons
Inventory rating50.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length327 ft (99.6 m)
Longest span66 ft (20.1 m)
Deck width19 ft (5.8 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic46 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 3rd ST over Trib to Thompson R built?

It was built in 2008, making it 17 years old in 2025.

What condition is 3rd ST over Trib to Thompson R 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 March 2024.

How much traffic does 3rd ST over Trib to Thompson R carry?

About 40 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is 3rd ST over Trib to Thompson R?

The structure is 327 ft (99.6 m) long with a longest span of 66 ft (20.1 m) and a deck 19 ft wide.

Who owns 3rd ST over Trib to Thompson R?

It is owned by the County Highway Agency.