US Bridges

County RD S-178 over Wolf CR

FairPosted for load

Polk County, Missouri · S 11 T 33 N R 22 W · Structure no. 22310

Built
1900
125 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
2 main spans
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

County RD S-178 over Wolf CR is a steel stringer/multi-beam or girder carrying County RD S-178 over Wolf CR in Polk County, Missouri. It was built in 1900, so it is 125 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. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 73 by 2044. The structure is 60 ft (18.3 m) long and 14 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesCounty RD S-178
CrossesWolf CR
LocationS 11 T 33 N R 22 W
RouteCounty Highway 350
CountyPolk County
StateMissouri
Coordinates37.60258, -93.30874
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating12.9 US tons
Inventory rating3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length60 ft (18.3 m)
Longest span29 ft (8.8 m)
Deck width14 ft (4.3 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic73 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$455,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD S-178 over Wolf CR built?

It was built in 1900, making it 125 years old in 2025.

What condition is County RD S-178 over Wolf 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 April 2024.

How much traffic does County RD S-178 over Wolf CR carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD S-178 over Wolf CR?

The structure is 60 ft (18.3 m) long with a longest span of 29 ft (8.8 m) and a deck 14 ft wide.

Who owns County RD S-178 over Wolf CR?

It is owned by the County Highway Agency.