US Bridges

Mo 171 S over Dry Br

Fair

Jasper County, Missouri · S 14 T 28 N R 33 W · Structure no. 6268

Built
1954
71 years old, rebuilt 1985
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
25 ft
2 main spans
Daily traffic
18,042
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 171 S over Dry Br is a concrete continuous culvert carrying Mo 171 S over Dry Br in Jasper County, Missouri. It was built in 1954 and reconstructed in 1985, so it is 71 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 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 18,042 vehicles a day, roughly 9% of them trucks, projected to reach 27,965 by 2044. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 11.2 mi (18 km).

CarriesMo 171 S
CrossesDry Br
LocationS 14 T 28 N R 33 W
RouteState Highway 171
Coordinates37.14255, -94.50706
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length25 ft (7.6 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18,042 (2024)
Projected traffic27,965 by 2044
Trucks9%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 km)
TollOn a free road
National Highway SystemYes

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 Mo 171 S over Dry Br built?

It was built in 1954, making it 71 years old in 2025. It was reconstructed in 1985.

What condition is Mo 171 S over Dry 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 January 2024.

How much traffic does Mo 171 S over Dry Br carry?

About 18,042 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Mo 171 S over Dry Br?

The structure is 25 ft (7.6 m) long with a longest span of 12 ft (3.7 m).

Who owns Mo 171 S over Dry Br?

It is owned by the State Highway Agency.