US Bridges

County RD 418 over Bear CR

Fair

Marion County, Missouri · S 34 T 57 N R 5 W · Structure no. 20849

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
139 ft
3 main spans
Daily traffic
600
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 418 over Bear CR is a prestressed concrete continuous tee beam carrying County RD 418 over Bear CR in Marion 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 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 600 vehicles a day, roughly 15% of them trucks, projected to reach 750 by 2043. The structure is 139 ft (42.4 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 418
CrossesBear CR
LocationS 34 T 57 N R 5 W
RouteCounty Highway 277
CountyMarion County
StateMissouri
Coordinates39.6925, -91.45092
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
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 rating54.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length139 ft (42.4 m)
Longest span50 ft (15.2 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic600 (2023)
Projected traffic750 by 2043
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 County RD 418 over Bear CR built?

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

What condition is County RD 418 over Bear CR 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 March 2023.

How much traffic does County RD 418 over Bear CR carry?

About 600 vehicles per day (2023 count), of which roughly 15% are trucks.

How long is County RD 418 over Bear CR?

The structure is 139 ft (42.4 m) long with a longest span of 50 ft (15.2 m) and a deck 27 ft wide.

Who owns County RD 418 over Bear CR?

It is owned by the County Highway Agency.