US Bridges

River RD over Pin Oak CR

Good

Gasconade County, Missouri · S 7 T 43 N R 6 W · Structure no. 36304

Built
2019
6 years old
Condition
Good
inspected March 2024
Type
Slab
Concrete
Length
26 ft
2 main spans
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

River RD over Pin Oak CR is a concrete slab carrying River RD over Pin Oak CR in Gasconade County, Missouri. It was built in 2019, so it is 6 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 60 by 2044. The structure is 26 ft (7.9 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesRiver RD
CrossesPin Oak CR
LocationS 7 T 43 N R 6 W
RouteCounty Highway 64
Coordinates38.48496, -91.63335
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span12 ft (3.7 m)
Deck width24 ft (7.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic60 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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was River RD over Pin Oak CR built?

It was built in 2019, making it 6 years old in 2025.

What condition is River RD over Pin Oak CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does River RD over Pin Oak CR carry?

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

How long is River RD over Pin Oak CR?

The structure is 26 ft (7.9 m) long with a longest span of 12 ft (3.7 m) and a deck 24 ft wide.

Who owns River RD over Pin Oak CR?

It is owned by the County Highway Agency.