US Bridges

Wallace School RD over Silver Fk CR

Good

Boone County, Missouri · S 26 T 57 N R 12 W · Structure no. 18371

Built
1980
45 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete
Length
51 ft
1 main span
Daily traffic
15
2023 count
Owner
County
County Highway Agency

About this bridge

Wallace School RD over Silver Fk CR is a prestressed concrete tee beam carrying Wallace School RD over Silver Fk CR in Boone County, Missouri. It was built in 1980, so it is 45 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 15 vehicles a day, roughly 2% of them trucks, projected to reach 29 by 2043. The structure is 51 ft (15.5 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesWallace School RD
CrossesSilver Fk CR
LocationS 26 T 57 N R 12 W
RouteCounty Highway 183
CountyBoone County
StateMissouri
Coordinates39.17292, -92.23292
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating27.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length51 ft (15.5 m)
Longest span50 ft (15.2 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2023)
Projected traffic29 by 2043
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Wallace School RD over Silver Fk CR built?

It was built in 1980, making it 45 years old in 2025.

What condition is Wallace School RD over Silver Fk CR 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 December 2024.

How much traffic does Wallace School RD over Silver Fk CR carry?

About 15 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Wallace School RD over Silver Fk CR?

The structure is 51 ft (15.5 m) long with a longest span of 50 ft (15.2 m) and a deck 23 ft wide.

Who owns Wallace School RD over Silver Fk CR?

It is owned by the County Highway Agency.