US Bridges

US 36 E over Grindstone CR

Fair

DeKalb County, Missouri · S 18 T 57 N R 30 W · Structure no. 3779

Built
1991
34 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
203 ft
3 main spans
Daily traffic
5,613
2024 count
Owner
State
State Highway Agency

About this bridge

US 36 E over Grindstone CR is a prestressed concrete continuous stringer/multi-beam or girder carrying US 36 E over Grindstone CR in DeKalb County, Missouri. It was built in 1991, so it is 34 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 5,613 vehicles a day, roughly 32% of them trucks, projected to reach 11,787 by 2044. The structure is 203 ft (61.9 m) long and 41 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 36 E
CrossesGrindstone CR
LocationS 18 T 57 N R 30 W
RouteU.S. Route 36
Coordinates39.75473, -94.31641
Functional classRural Principal Arterial - Other

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
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 evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.4 US tons
Inventory rating44.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length203 ft (61.9 m)
Longest span80 ft (24.4 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,613 (2024)
Projected traffic11,787 by 2044
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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 US 36 E over Grindstone CR built?

It was built in 1991, making it 34 years old in 2025.

What condition is US 36 E 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 US 36 E over Grindstone CR carry?

About 5,613 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is US 36 E over Grindstone CR?

The structure is 203 ft (61.9 m) long with a longest span of 80 ft (24.4 m) and a deck 41 ft wide.

Who owns US 36 E over Grindstone CR?

It is owned by the State Highway Agency.