US Bridges

County RD 423 over Bear CR

Fair

Marion County, Missouri · S 29 T 57 N R 5 W · Structure no. 35408

Built
2017
8 years old
Condition
Fair
inspected March 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
85 ft
1 main span
Daily traffic
150
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 423 over Bear CR is a concrete box beam or girders - multiple carrying County RD 423 over Bear CR in Marion County, Missouri. It was built in 2017, so it is 8 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 188 by 2043. The structure is 85 ft (25.8 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD 423
CrossesBear CR
LocationS 29 T 57 N R 5 W
RouteCounty Highway 262
CountyMarion County
StateMissouri
Coordinates39.70972, -91.48083
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating51.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length85 ft (25.8 m)
Longest span82 ft (25 m)
Deck width27 ft (8.2 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic188 by 2043
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 County RD 423 over Bear CR built?

It was built in 2017, making it 8 years old in 2025.

What condition is County RD 423 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 423 over Bear CR carry?

About 150 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 423 over Bear CR?

The structure is 85 ft (25.8 m) long with a longest span of 82 ft (25 m) and a deck 27 ft wide.

Who owns County RD 423 over Bear CR?

It is owned by the County Highway Agency.