US Bridges

170 Road over Oak Creek

FairPosted for load

Smith County, Kansas · 2.5S 2.5W of Lebanon · Structure no. 000920685403320

Built
1973
52 years old
Condition
Fair
inspected February 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
70 ft
3 main spans
Daily traffic
20
2020 count
Owner
County
County Highway Agency

About this bridge

170 Road over Oak Creek is a steel continuous girder and floorbeam system carrying 170 Road over Oak Creek in Smith County, Kansas. It was built in 1973, so it is 52 years old, younger than the Kansas average of 52.8 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 20 vehicles a day, projected to reach 25 by 2043. The structure is 70 ft (21.3 m) long and 16 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries170 Road
CrossesOak Creek
Location2.5S 2.5W of Lebanon
RouteCounty Highway 0
CountySmith County
StateKansas
Coordinates39.77011, -98.60953
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.7 US tons
Inventory rating12.3 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckWood or timber
Main spans3
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span25 ft (7.7 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic20 (2020)
Projected traffic25 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$450,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 170 Road over Oak Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is 170 Road over Oak Creek 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 February 2023.

How much traffic does 170 Road over Oak Creek carry?

About 20 vehicles per day (2020 count).

How long is 170 Road over Oak Creek?

The structure is 70 ft (21.3 m) long with a longest span of 25 ft (7.7 m) and a deck 16 ft wide.

Who owns 170 Road over Oak Creek?

It is owned by the County Highway Agency.