US Bridges

1420 RD Mile 21 over Verdigris River

Good

Montgomery County, Kansas · 2.1S of Coffeyville · Structure no. 000631009407121

Built
1988
37 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
316 ft
3 main spans
Daily traffic
40
2010 count
Owner
County
County Highway Agency

About this bridge

1420 RD Mile 21 over Verdigris River is a steel continuous stringer/multi-beam or girder carrying 1420 RD Mile 21 over Verdigris River in Montgomery County, Kansas. It was built in 1988, so it is 37 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 40 vehicles a day, roughly 2% of them trucks, projected to reach 48 by 2039. The structure is 316 ft (96.2 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries1420 RD Mile 21
CrossesVerdigris River
Location2.1S of Coffeyville
RouteCounty Highway 6302
StateKansas
Coordinates37.00554, -95.59228
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 inspectionMarch 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 geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length316 ft (96.2 m)
Longest span120 ft (36.5 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic40 (2010)
Projected traffic48 by 2039
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 1420 RD Mile 21 over Verdigris River built?

It was built in 1988, making it 37 years old in 2025.

What condition is 1420 RD Mile 21 over Verdigris 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 March 2023.

How much traffic does 1420 RD Mile 21 over Verdigris River carry?

About 40 vehicles per day (2010 count), of which roughly 2% are trucks.

How long is 1420 RD Mile 21 over Verdigris River?

The structure is 316 ft (96.2 m) long with a longest span of 120 ft (36.5 m) and a deck 28 ft wide.

Who owns 1420 RD Mile 21 over Verdigris River?

It is owned by the County Highway Agency.