US Bridges

Rs 304 W 85st N over Big Ditch Floodway

Good

Sedgwick County, Kansas · 85THN 0.9 E of 71STW · Structure no. 000000000870710

Built
2001
24 years old
Condition
Good
inspected August 2023
Type
Slab
Prestressed Concrete Continuous
Length
561 ft
7 main spans
Daily traffic
1,788
2022 count
Owner
County
County Highway Agency

About this bridge

Rs 304 W 85st N over Big Ditch Floodway is a prestressed concrete continuous slab carrying Rs 304 W 85st N over Big Ditch Floodway in Sedgwick County, Kansas. It was built in 2001, so it is 24 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 1,788 vehicles a day, roughly 7% of them trucks, projected to reach 2,181 by 2044. The structure is 561 ft (170.9 m) long and 42 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesRs 304 W 85st N
CrossesBig Ditch Floodway
Location85THN 0.9 E of 71STW
RouteCounty Highway 304
CountySedgwick County
StateKansas
Coordinates37.83921, -97.40871
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadHS 20
Structure length561 ft (170.9 m)
Longest span85 ft (25.9 m)
Deck width42 ft (12.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,788 (2022)
Projected traffic2,181 by 2044
Trucks7%
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 statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$100,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rs 304 W 85st N over Big Ditch Floodway built?

It was built in 2001, making it 24 years old in 2025.

What condition is Rs 304 W 85st N over Big Ditch Floodway 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 August 2023.

How much traffic does Rs 304 W 85st N over Big Ditch Floodway carry?

About 1,788 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Rs 304 W 85st N over Big Ditch Floodway?

The structure is 561 ft (170.9 m) long with a longest span of 85 ft (25.9 m) and a deck 42 ft wide.

Who owns Rs 304 W 85st N over Big Ditch Floodway?

It is owned by the County Highway Agency.