US Bridges

Rt C S over Grindstone CR

Fair

DeKalb County, Missouri · S 5 T 57 N R 30 W · Structure no. 7561

Built
1952
73 years old, rebuilt 2009
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
147 ft
3 main spans
Daily traffic
706
2024 count
Owner
State
State Highway Agency

About this bridge

Rt C S over Grindstone CR is a steel stringer/multi-beam or girder carrying Rt C S over Grindstone CR in DeKalb County, Missouri. It was built in 1952 and reconstructed in 2009, so it is 73 years old, older 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 706 vehicles a day, roughly 6% of them trucks, projected to reach 918 by 2044. The structure is 147 ft (44.8 m) long and 25 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

Location

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CarriesRt C S
CrossesGrindstone CR
LocationS 5 T 57 N R 30 W
RouteState Highway 0C
CountyDeKalb County
StateMissouri
Coordinates39.78116, -94.28715
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating23.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length147 ft (44.8 m)
Longest span51 ft (15.6 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic706 (2024)
Projected traffic918 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Rt C S over Grindstone CR built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2009.

What condition is Rt C S over Grindstone CR 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 December 2023.

How much traffic does Rt C S over Grindstone CR carry?

About 706 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Rt C S over Grindstone CR?

The structure is 147 ft (44.8 m) long with a longest span of 51 ft (15.6 m) and a deck 25 ft wide.

Who owns Rt C S over Grindstone CR?

It is owned by the State Highway Agency.