US Bridges

County Road 553 over S Wyaconda Rvr

Good

Scotland County, Missouri · S 20 T 66 N R 11 W · Structure no. 17221

Built
1997
28 years old, rebuilt 2016
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
120 ft
3 main spans
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

County Road 553 over S Wyaconda Rvr is a steel stringer/multi-beam or girder carrying County Road 553 over S Wyaconda Rvr in Scotland County, Missouri. It was built in 1997 and reconstructed in 2016, so it is 28 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 120 ft (36.6 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 553
CrossesS Wyaconda Rvr
LocationS 20 T 66 N R 11 W
RouteCounty Highway 146
CountyScotland County
StateMissouri
Coordinates40.51056, -92.14667
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length120 ft (36.6 m)
Longest span70 ft (21.3 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 553 over S Wyaconda Rvr built?

It was built in 1997, making it 28 years old in 2025. It was reconstructed in 2016.

What condition is County Road 553 over S 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 June 2023.

How much traffic does County Road 553 over S Wyaconda Rvr carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County Road 553 over S Wyaconda Rvr?

The structure is 120 ft (36.6 m) long with a longest span of 70 ft (21.3 m) and a deck 20 ft wide.

Who owns County Road 553 over S Wyaconda Rvr?

It is owned by the County Highway Agency.