US Bridges

County Road 160 over Rock Br

Fair

Carroll County, Missouri · S 2 T 54 N R 23 W · Structure no. 19203

Built
1950
75 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

County Road 160 over Rock Br is a steel stringer/multi-beam or girder carrying County Road 160 over Rock Br in Carroll County, Missouri. It was built in 1950, so it is 75 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.

It carries about 40 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2044. The structure is 30 ft (9.1 m) long and 16 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCounty Road 160
CrossesRock Br
LocationS 2 T 54 N R 23 W
RouteCounty Highway 214
CountyCarroll County
StateMissouri
Coordinates39.52884, -93.45466
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.7 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$196,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 160 over Rock Br built?

It was built in 1950, making it 75 years old in 2025.

What condition is County Road 160 over Rock Br 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 February 2024.

How much traffic does County Road 160 over Rock Br carry?

About 40 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County Road 160 over Rock Br?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 16 ft wide.

Who owns County Road 160 over Rock Br?

It is owned by the County Highway Agency.