US Bridges

311th Local Rd. over Big Slough

Good

Sedgwick County, Kansas · 311THW 0.1 N of 85THN · Structure no. 000870781005981

Built
1989
36 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
53 ft
5 main spans
Daily traffic
35
2022 count
Owner
County
County Highway Agency

About this bridge

311th Local Rd. over Big Slough is a concrete culvert carrying 311th Local Rd. over Big Slough in Sedgwick County, Kansas. It was built in 1989, so it is 36 years old, younger than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 35 vehicles a day, projected to reach 60 by 2044. The structure is 53 ft (16.2 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries311th Local Rd.
CrossesBig Slough
Location311THW 0.1 N of 85THN
RouteCounty Highway 0
CountySedgwick County
StateKansas
Coordinates37.84201, -97.70208
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans5
Design loadH 20
Structure length53 ft (16.2 m)
Longest span10 ft (3 m)
Deck width30 ft (9 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic35 (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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 311th Local Rd. over Big Slough built?

It was built in 1989, making it 36 years old in 2025.

What condition is 311th Local Rd. over Big Slough in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in April 2023.

How much traffic does 311th Local Rd. over Big Slough carry?

About 35 vehicles per day (2022 count).

How long is 311th Local Rd. over Big Slough?

The structure is 53 ft (16.2 m) long with a longest span of 10 ft (3 m) and a deck 30 ft wide.

Who owns 311th Local Rd. over Big Slough?

It is owned by the County Highway Agency.