US Bridges

SW 170th 634-11 over Little Walnut River

Fair

Butler County, Kansas · 1.0S 1.5E of Gordon · Structure no. 000000000081050

Built
1955
70 years old, rebuilt 2015
Condition
Fair
inspected July 2024
Type
Tee Beam
Concrete Continuous
Length
344 ft
5 main spans
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

SW 170th 634-11 over Little Walnut River is a concrete continuous tee beam carrying SW 170th 634-11 over Little Walnut River in Butler County, Kansas. It was built in 1955 and reconstructed in 2015, so it is 70 years old, older 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 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 200 vehicles a day, roughly 1% of them trucks, projected to reach 600 by 2045. The structure is 344 ft (104.9 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSW 170th 634-11
CrossesLittle Walnut River
Location1.0S 1.5E of Gordon
RouteCounty Highway 1687
CountyButler County
StateKansas
Coordinates37.57761, -96.95751
Functional classRural Major Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be 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 rating28.5 US tons
Inventory rating15.2 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length344 ft (104.9 m)
Longest span77 ft (23.5 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic200 (2023)
Projected traffic600 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SW 170th 634-11 over Little Walnut River built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2015.

What condition is SW 170th 634-11 over Little Walnut River 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 2024.

How much traffic does SW 170th 634-11 over Little Walnut River carry?

About 200 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is SW 170th 634-11 over Little Walnut River?

The structure is 344 ft (104.9 m) long with a longest span of 77 ft (23.5 m) and a deck 26 ft wide.

Who owns SW 170th 634-11 over Little Walnut River?

It is owned by the County Highway Agency.