US Bridges

SE Grindstone RD over Grindstone CR

Fair

DeKalb County, Missouri · S 21 T 58 N R 30 W · Structure no. 24062

Built
1985
40 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
148 ft
3 main spans
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

SE Grindstone RD over Grindstone CR is a prestressed concrete continuous tee beam carrying SE Grindstone RD over Grindstone CR in DeKalb County, Missouri. It was built in 1985, so it is 40 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 58 by 2044. The structure is 148 ft (45.1 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSE Grindstone RD
CrossesGrindstone CR
LocationS 21 T 58 N R 30 W
RouteCounty Highway 454
CountyDeKalb County
StateMissouri
Coordinates39.82957, -94.26699
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 15
Structure length148 ft (45.1 m)
Longest span49 ft (14.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic58 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 SE Grindstone RD over Grindstone CR built?

It was built in 1985, making it 40 years old in 2025.

What condition is SE Grindstone RD 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 February 2023.

How much traffic does SE Grindstone RD over Grindstone CR carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SE Grindstone RD over Grindstone CR?

The structure is 148 ft (45.1 m) long with a longest span of 49 ft (14.9 m) and a deck 27 ft wide.

Who owns SE Grindstone RD over Grindstone CR?

It is owned by the County Highway Agency.