US Bridges

45th over Big Slough

Fair

Sedgwick County, Kansas · 45THN 0.4 E of 87THW · Structure no. 000870809406080

Built
1987
38 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
129 ft
4 main spans
Daily traffic
2,775
2022 count
Owner
County
County Highway Agency

About this bridge

45th over Big Slough is a concrete continuous slab carrying 45th over Big Slough in Sedgwick County, Kansas. It was built in 1987, so it is 38 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 2,775 vehicles a day, roughly 5% of them trucks, projected to reach 3,386 by 2044. The structure is 129 ft (39.3 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries45th
CrossesBig Slough
Location45THN 0.4 E of 87THW
RouteCounty Highway 0
CountySedgwick County
StateKansas
Coordinates37.76639, -97.43791
Functional classUrban 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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating50.3 US tons
Inventory rating30.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length129 ft (39.3 m)
Longest span36 ft (11 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic2,775 (2022)
Projected traffic3,386 by 2044
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 45th over Big Slough built?

It was built in 1987, making it 38 years old in 2025.

What condition is 45th 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 August 2023.

How much traffic does 45th over Big Slough carry?

About 2,775 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is 45th over Big Slough?

The structure is 129 ft (39.3 m) long with a longest span of 36 ft (11 m) and a deck 30 ft wide.

Who owns 45th over Big Slough?

It is owned by the County Highway Agency.