US Bridges

County Road 857 over Wyaconda Rvr

Fair

Scotland County, Missouri · S 12 T 66 N R 12 W · Structure no. 33307

Built
2011
14 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
143 ft
3 main spans
Daily traffic
75
2024 count
Owner
County
County Highway Agency

About this bridge

County Road 857 over Wyaconda Rvr is a prestressed concrete continuous stringer/multi-beam or girder carrying County Road 857 over Wyaconda Rvr in Scotland County, Missouri. It was built in 2011, so it is 14 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 75 vehicles a day, roughly 10% of them trucks, projected to reach 94 by 2044. The structure is 143 ft (43.7 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Road 857
CrossesWyaconda Rvr
LocationS 12 T 66 N R 12 W
RouteCounty Highway 140
CountyScotland County
StateMissouri
Coordinates40.53881, -92.18379
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
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating36.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length143 ft (43.7 m)
Longest span48 ft (14.6 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2024)
Projected traffic94 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 Road 857 over Wyaconda Rvr built?

It was built in 2011, making it 14 years old in 2025.

What condition is County Road 857 over Wyaconda 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 2023.

How much traffic does County Road 857 over Wyaconda Rvr carry?

About 75 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County Road 857 over Wyaconda Rvr?

The structure is 143 ft (43.7 m) long with a longest span of 48 ft (14.6 m) and a deck 25 ft wide.

Who owns County Road 857 over Wyaconda Rvr?

It is owned by the County Highway Agency.