US Bridges

County Road 171 over Moss CR

Fair

Carroll County, Missouri · S 30 T 52 N R 24 W · Structure no. 24618

Built
1993
32 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
111 ft
3 main spans
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

County Road 171 over Moss CR is a prestressed concrete continuous tee beam carrying County Road 171 over Moss CR in Carroll County, Missouri. It was built in 1993, so it is 32 years old, younger 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 6 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 111 ft (33.8 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty Road 171
CrossesMoss CR
LocationS 30 T 52 N R 24 W
RouteCounty Highway 519
CountyCarroll County
StateMissouri
Coordinates39.29239, -93.62437
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length111 ft (33.8 m)
Longest span37 ft (11.3 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2024)
Projected traffic44 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 County Road 171 over Moss CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is County Road 171 over Moss 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 2023.

How much traffic does County Road 171 over Moss CR carry?

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

How long is County Road 171 over Moss CR?

The structure is 111 ft (33.8 m) long with a longest span of 37 ft (11.3 m) and a deck 25 ft wide.

Who owns County Road 171 over Moss CR?

It is owned by the County Highway Agency.