US Bridges

County RD 358 over Wyaconda Rvr

Good

Clark County, Missouri · S 4 T 63 N R 7 W · Structure no. 34411

Built
2013
12 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
230 ft
3 main spans
Daily traffic
20
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 358 over Wyaconda Rvr is a prestressed concrete continuous stringer/multi-beam or girder carrying County RD 358 over Wyaconda Rvr in Clark County, Missouri. It was built in 2013, so it is 12 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 25 by 2044. The structure is 230 ft (70.1 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty RD 358
CrossesWyaconda Rvr
LocationS 4 T 63 N R 7 W
RouteCounty Highway 358
CountyClark County
StateMissouri
Coordinates40.28669, -91.68128
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length230 ft (70.1 m)
Longest span80 ft (24.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2024)
Projected traffic25 by 2044
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 358 over Wyaconda Rvr built?

It was built in 2013, making it 12 years old in 2025.

What condition is County RD 358 over Wyaconda Rvr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does County RD 358 over Wyaconda Rvr carry?

About 20 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 358 over Wyaconda Rvr?

The structure is 230 ft (70.1 m) long with a longest span of 80 ft (24.4 m) and a deck 26 ft wide.

Who owns County RD 358 over Wyaconda Rvr?

It is owned by the County Highway Agency.