US Bridges

Sunflower Rd. over Cottonwood River

Good

Marion County, Kansas · S. Edge of Marion · Structure no. 000000000570320

Built
1983
42 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
258 ft
3 main spans
Daily traffic
775
2020 count
Owner
County
County Highway Agency

About this bridge

Sunflower Rd. over Cottonwood River is a prestressed concrete continuous stringer/multi-beam or girder carrying Sunflower Rd. over Cottonwood River in Marion County, Kansas. It was built in 1983, so it is 42 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 775 vehicles a day, projected to reach 906 by 2045. The structure is 258 ft (78.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSunflower Rd.
CrossesCottonwood River
LocationS. Edge of Marion
RouteCounty Highway 425
CountyMarion County
StateKansas
Coordinates38.33853, -97.02147
Functional classRural Major 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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating69.4 US tons
Inventory rating32.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length258 ft (78.6 m)
Longest span85 ft (25.9 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic775 (2020)
Projected traffic906 by 2045
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Sunflower Rd. over Cottonwood River built?

It was built in 1983, making it 42 years old in 2025.

What condition is Sunflower Rd. over Cottonwood River 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 February 2025.

How much traffic does Sunflower Rd. over Cottonwood River carry?

About 775 vehicles per day (2020 count).

How long is Sunflower Rd. over Cottonwood River?

The structure is 258 ft (78.6 m) long with a longest span of 85 ft (25.9 m) and a deck 30 ft wide.

Who owns Sunflower Rd. over Cottonwood River?

It is owned by the County Highway Agency.