US Bridges

Mo 6 E over Thompson Rvr

Fair

Grundy County, Missouri · S 19 T 61 N R 24 W · Structure no. 659

Built
1962
63 years old, rebuilt 2005
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
870 ft
3 main spans
Daily traffic
4,698
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 6 E over Thompson Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 6 E over Thompson Rvr in Grundy County, Missouri. It was built in 1962 and reconstructed in 2005, so it is 63 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 4,698 vehicles a day, roughly 12% of them trucks, projected to reach 8,222 by 2044. The structure is 870 ft (265.2 m) long and 33 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

Open in Google Maps
CarriesMo 6 E
CrossesThompson Rvr
LocationS 19 T 61 N R 24 W
RouteState Highway 6
CountyGrundy County
StateMissouri
Coordinates40.06936, -93.63818
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+6 approach)
Design loadH 20
Structure length870 ft (265.2 m)
Longest span150 ft (45.7 m)
Deck width33 ft (10.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,698 (2024)
Projected traffic8,222 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mo 6 E over Thompson Rvr built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 2005.

What condition is Mo 6 E over Thompson Rvr 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 May 2023.

How much traffic does Mo 6 E over Thompson Rvr carry?

About 4,698 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 6 E over Thompson Rvr?

The structure is 870 ft (265.2 m) long with a longest span of 150 ft (45.7 m) and a deck 33 ft wide.

Who owns Mo 6 E over Thompson Rvr?

It is owned by the State Highway Agency.