US Bridges

Mo 171 S over Dry Br

Fair

Jasper County, Missouri · S 30 T 29 N R 33 W · Structure no. 4834

Built
1925
100 years old, rebuilt 1962
Condition
Fair
inspected January 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
8,512
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 1925 and reconstructed in 1962, so it is 100 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 8,512 vehicles a day, roughly 29% of them trucks, projected to reach 15,322 by 2044. The structure is 29 ft (8.7 m) long and 42 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesMo 171 S
CrossesDry Br
LocationS 30 T 29 N R 33 W
RouteState Highway 171
CountyJasper County
StateMissouri
Coordinates37.2155, -94.56685
Functional classRural Principal Arterial - Other

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating48.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length29 ft (8.7 m)
Longest span12 ft (3.7 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,512 (2024)
Projected traffic15,322 by 2044
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 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 1925, making it 100 years old in 2025. It was reconstructed in 1962.

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 8,512 vehicles per day (2024 count), of which roughly 29% are trucks.

How long is Mo 171 S over Dry Br?

The structure is 29 ft (8.7 m) long with a longest span of 12 ft (3.7 m) and a deck 42 ft wide.

Who owns Mo 171 S over Dry Br?

It is owned by the State Highway Agency.