US Bridges

Mo 6 E over Grand Rvr

Poor

Daviess County, Missouri · S 16 T 59 N R 27 W · Structure no. 4437

Built
1968
57 years old
Condition
Poor
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
636 ft
3 main spans
Daily traffic
4,837
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 6 E over Grand Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 6 E over Grand Rvr in Daviess County, Missouri. It was built in 1968, 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,837 vehicles a day, roughly 19% of them trucks, projected to reach 10,158 by 2044. The structure is 636 ft (193.9 m) long and 47 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesMo 6 E
CrossesGrand Rvr
LocationS 16 T 59 N R 27 W
RouteState Highway 6
Coordinates39.92651, -93.94337
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.5 US tons
Inventory rating33.7 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+4 approach)
Design loadH 20
Structure length636 ft (193.9 m)
Longest span170 ft (51.8 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,837 (2024)
Projected traffic10,158 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.7 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 6 E over Grand Rvr built?

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

What condition is Mo 6 E over Grand Rvr in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2024.

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

About 4,837 vehicles per day (2024 count), of which roughly 19% are trucks.

How long is Mo 6 E over Grand Rvr?

The structure is 636 ft (193.9 m) long with a longest span of 170 ft (51.8 m) and a deck 47 ft wide.

Who owns Mo 6 E over Grand Rvr?

It is owned by the State Highway Agency.