US Bridges

Rt Hh S over Rock CR

Good

Macon County, Missouri · S 23 T 59 N R 16 W · Structure no. 7011

Built
1960
65 years old
Condition
Good
inspected September 2023
Type
Culvert
Concrete Continuous
Length
34 ft
3 main spans
Daily traffic
49
2024 count
Owner
State
State Highway Agency

About this bridge

Rt Hh S over Rock CR is a concrete continuous culvert carrying Rt Hh S over Rock CR in Macon County, Missouri. It was built in 1960, so it is 65 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 49 vehicles a day, roughly 15% of them trucks, projected to reach 61 by 2044. The structure is 34 ft (10.4 m) long and 26 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesRt Hh S
CrossesRock CR
LocationS 23 T 59 N R 16 W
RouteState Highway 0HH
Coordinates39.90202, -92.6531
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.6 US tons
Inventory rating29.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans3
Design loadH 10
Structure length34 ft (10.4 m)
Longest span11 ft (3.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic49 (2024)
Projected traffic61 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

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 Rt Hh S over Rock CR built?

It was built in 1960, making it 65 years old in 2025.

What condition is Rt Hh S over Rock 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 September 2023.

How much traffic does Rt Hh S over Rock CR carry?

About 49 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Rt Hh S over Rock CR?

The structure is 34 ft (10.4 m) long with a longest span of 11 ft (3.4 m) and a deck 26 ft wide.

Who owns Rt Hh S over Rock CR?

It is owned by the State Highway Agency.