US Bridges

County RD 512 over Maries CR

Good

Osage County, Missouri · S 34 T 43 N R 10 W · Structure no. 14714

Built
1910
115 years old, rebuilt 1985
Condition
Good
inspected April 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
142 ft
3 main spans
Daily traffic
60
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 512 over Maries CR is a prestressed concrete continuous tee beam carrying County RD 512 over Maries CR in Osage County, Missouri. It was built in 1910 and reconstructed in 1985, so it is 115 years old, older 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 60 vehicles a day, roughly 10% of them trucks, projected to reach 84 by 2043. The structure is 142 ft (43.3 m) long and 27 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

CarriesCounty RD 512
CrossesMaries CR
LocationS 34 T 43 N R 10 W
RouteCounty Highway 73
Coordinates38.42997, -92.01353
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 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 rating54.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length142 ft (43.3 m)
Longest span48 ft (14.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic60 (2023)
Projected traffic84 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 County RD 512 over Maries CR built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1985.

What condition is County RD 512 over Maries 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 April 2023.

How much traffic does County RD 512 over Maries CR carry?

About 60 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 512 over Maries CR?

The structure is 142 ft (43.3 m) long with a longest span of 48 ft (14.6 m) and a deck 27 ft wide.

Who owns County RD 512 over Maries CR?

It is owned by the County Highway Agency.