US Bridges

Olivet RD over S Fk Grindstone CR

FairPosted for load

Boone County, Missouri · S 13 T 48 N R 12 W · Structure no. 21830

Built
1970
55 years old, rebuilt 2002
Condition
Fair
inspected December 2024
Type
Channel Beam
Concrete
Length
35 ft
1 main span
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

Olivet RD over S Fk Grindstone CR is a concrete channel beam carrying Olivet RD over S Fk Grindstone CR in Boone County, Missouri. It was built in 1970 and reconstructed in 2002, so it is 55 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 250 vehicles a day, roughly 5% of them trucks, projected to reach 475 by 2043. The structure is 35 ft (10.7 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesOlivet RD
CrossesS Fk Grindstone CR
LocationS 13 T 48 N R 12 W
RouteCounty Highway 326
CountyBoone County
StateMissouri
Coordinates38.94278, -92.22808
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating52.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadOther
Structure length35 ft (10.7 m)
Longest span33 ft (10.1 m)
Deck width25 ft (7.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic475 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Olivet RD over S Fk Grindstone CR built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2002.

What condition is Olivet RD over S Fk 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 2024.

How much traffic does Olivet RD over S Fk Grindstone CR carry?

About 250 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Olivet RD over S Fk Grindstone CR?

The structure is 35 ft (10.7 m) long with a longest span of 33 ft (10.1 m) and a deck 25 ft wide.

Who owns Olivet RD over S Fk Grindstone CR?

It is owned by the County Highway Agency.