US Bridges

Seneca over Big Slough South

Fair

Sedgwick County, Kansas · Seneca at Carey · Structure no. 430400876325010

Built
1997
28 years old
Condition
Fair
inspected September 2023
Type
Culvert
Concrete
Length
53 ft
3 main spans
Daily traffic
18,500
2006 count
Owner
City
City or Municipal Highway Agency

About this bridge

Seneca over Big Slough South is a concrete culvert carrying Seneca over Big Slough South in Sedgwick County, Kansas. It was built in 1997, so it is 28 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 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 18,500 vehicles a day, roughly 4% of them trucks, projected to reach 21,000 by 2039. The structure is 53 ft (16.2 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSeneca
CrossesBig Slough South
LocationSeneca at Carey
RouteCity Street 6325
StateKansas
Coordinates37.62624, -97.35246
Functional classUrban Minor Arterial

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 inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.2 US tons
Inventory rating52.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span12 ft (3.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic18,500 (2006)
Projected traffic21,000 by 2039
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Seneca over Big Slough South built?

It was built in 1997, making it 28 years old in 2025.

What condition is Seneca over Big Slough South 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 September 2023.

How much traffic does Seneca over Big Slough South carry?

About 18,500 vehicles per day (2006 count), of which roughly 4% are trucks.

How long is Seneca over Big Slough South?

The structure is 53 ft (16.2 m) long with a longest span of 12 ft (3.6 m).

Who owns Seneca over Big Slough South?

It is owned by the City or Municipal Highway Agency.