US Bridges

N 231st Local Rd. over Big Slough

FairPosted for load

Sedgwick County, Kansas · 231STW 0.7 N of 77THN · Structure no. 000870791005983

Built
1970
55 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete
Length
33 ft
3 main spans
Daily traffic
40
2022 count
Owner
County
County Highway Agency

About this bridge

N 231st Local Rd. over Big Slough is a concrete culvert carrying N 231st Local Rd. over Big Slough in Sedgwick County, Kansas. It was built in 1970, so it is 55 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. Its operating status is: posted for load restriction.

It carries about 40 vehicles a day, projected to reach 60 by 2044. The structure is 33 ft (10.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesN 231st Local Rd.
CrossesBig Slough
Location231STW 0.7 N of 77THN
RouteCounty Highway 0
CountySedgwick County
StateKansas
Coordinates37.83502, -97.6104
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating22.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length33 ft (10.1 m)
Longest span10 ft (3 m)
Deck width33 ft (10.2 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic40 (2022)
Projected traffic60 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was N 231st Local Rd. over Big Slough built?

It was built in 1970, making it 55 years old in 2025.

What condition is N 231st Local Rd. over Big Slough 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 N 231st Local Rd. over Big Slough carry?

About 40 vehicles per day (2022 count).

How long is N 231st Local Rd. over Big Slough?

The structure is 33 ft (10.1 m) long with a longest span of 10 ft (3 m) and a deck 33 ft wide.

Who owns N 231st Local Rd. over Big Slough?

It is owned by the County Highway Agency.