US Bridges

Mo 18 E over S Grand Rvr

Fair

Henry County, Missouri · S 1 T 41 N R 27 W · Structure no. 3406

Built
1976
49 years old, rebuilt 2020
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,048 ft
9 main spans
Daily traffic
1,703
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 18 E over S Grand Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 18 E over S Grand Rvr in Henry County, Missouri. It was built in 1976 and reconstructed in 2020, so it is 49 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 5 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 1,703 vehicles a day, roughly 7% of them trucks, projected to reach 2,555 by 2044. The structure is 1,048 ft (319.4 m) long and 31 ft wide. If it were closed, the detour would be 37.3 mi (60 km).

Location

Open in Google Maps
CarriesMo 18 E
CrossesS Grand Rvr
LocationS 1 T 41 N R 27 W
RouteState Highway 18
CountyHenry County
StateMissouri
Coordinates38.37094, -93.85641
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans9
Design loadH 20
Structure length1,048 ft (319.4 m)
Longest span160 ft (48.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,703 (2024)
Projected traffic2,555 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.3 mi (60 km)
TollOn a free road
National Highway SystemNo

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 18 E over S Grand Rvr built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 2020.

What condition is Mo 18 E over S Grand 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 June 2024.

How much traffic does Mo 18 E over S Grand Rvr carry?

About 1,703 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Mo 18 E over S Grand Rvr?

The structure is 1,048 ft (319.4 m) long with a longest span of 160 ft (48.8 m) and a deck 31 ft wide.

Who owns Mo 18 E over S Grand Rvr?

It is owned by the State Highway Agency.