US Bridges

US 36 W over Grindstone CR

Fair

DeKalb County, Missouri · S 18 T 57 N R 30 W · Structure no. 1288

Built
1966
59 years old, rebuilt 2011
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
203 ft
3 main spans
Daily traffic
6,007
2024 count
Owner
State
State Highway Agency

About this bridge

US 36 W over Grindstone CR is a steel continuous stringer/multi-beam or girder carrying US 36 W over Grindstone CR in DeKalb County, Missouri. It was built in 1966 and reconstructed in 2011, so it is 59 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 6,007 vehicles a day, roughly 23% of them trucks, projected to reach 12,615 by 2044. The structure is 203 ft (62 m) long and 35 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesUS 36 W
CrossesGrindstone CR
LocationS 18 T 57 N R 30 W
RouteU.S. Route 36
CountyDeKalb County
StateMissouri
Coordinates39.75497, -94.31635
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length203 ft (62 m)
Longest span80 ft (24.4 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,007 (2024)
Projected traffic12,615 by 2044
Trucks23%
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 W over Grindstone CR built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 2011.

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

About 6,007 vehicles per day (2024 count), of which roughly 23% are trucks.

How long is US 36 W over Grindstone CR?

The structure is 203 ft (62 m) long with a longest span of 80 ft (24.4 m) and a deck 35 ft wide.

Who owns US 36 W over Grindstone CR?

It is owned by the State Highway Agency.