US Bridges

Rolling Hills RD over N Fk of Grindstone

Good

Boone County, Missouri · S 15 T 48 N R 12 W · Structure no. 34416

Built
2012
13 years old
Condition
Good
inspected December 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
324 ft
3 main spans
Daily traffic
1,000
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Rolling Hills RD over N Fk of Grindstone is a prestressed concrete continuous tee beam carrying Rolling Hills RD over N Fk of Grindstone in Boone County, Missouri. It was built in 2012, so it is 13 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,000 vehicles a day, roughly 5% of them trucks, projected to reach 1,900 by 2043. The structure is 324 ft (98.8 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesRolling Hills RD
CrossesN Fk of Grindstone
LocationS 15 T 48 N R 12 W
RouteCity Street 0
Coordinates38.94597, -92.25672
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.4 US tons
Inventory rating47.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length324 ft (98.8 m)
Longest span125 ft (38.1 m)
Deck width34 ft (10.4 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2023)
Projected traffic1,900 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Rolling Hills RD over N Fk of Grindstone built?

It was built in 2012, making it 13 years old in 2025.

What condition is Rolling Hills RD over N Fk of Grindstone 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 December 2024.

How much traffic does Rolling Hills RD over N Fk of Grindstone carry?

About 1,000 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Rolling Hills RD over N Fk of Grindstone?

The structure is 324 ft (98.8 m) long with a longest span of 125 ft (38.1 m) and a deck 34 ft wide.

Who owns Rolling Hills RD over N Fk of Grindstone?

It is owned by the City or Municipal Highway Agency.