US Bridges

Mo 171 S over Spring Rvr

Fair

Jasper County, Missouri · S 18 T 29 N R 33 W · Structure no. 3476

Built
1985
40 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
849 ft
3 main spans
Daily traffic
8,512
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 171 S over Spring Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 171 S over Spring Rvr in Jasper County, Missouri. It was built in 1985, so it is 40 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 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 8,512 vehicles a day, roughly 29% of them trucks, projected to reach 15,322 by 2044. The structure is 849 ft (258.8 m) long and 41 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesMo 171 S
CrossesSpring Rvr
LocationS 18 T 29 N R 33 W
RouteState Highway 171
CountyJasper County
StateMissouri
Coordinates37.23337, -94.57696
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJuly 2023
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 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 rating58.5 US tons
Inventory rating34.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+8 approach)
Design loadHS 20
Structure length849 ft (258.8 m)
Longest span150 ft (45.7 m)
Deck width41 ft (12.6 m)
Roadway width39 ft (11.8 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 Spring Rvr built?

It was built in 1985, making it 40 years old in 2025.

What condition is Mo 171 S over Spring Rvr 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 July 2023.

How much traffic does Mo 171 S over Spring Rvr carry?

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

How long is Mo 171 S over Spring Rvr?

The structure is 849 ft (258.8 m) long with a longest span of 150 ft (45.7 m) and a deck 41 ft wide.

Who owns Mo 171 S over Spring Rvr?

It is owned by the State Highway Agency.