US Bridges

R-21 234th Street over Nine Mile Creek

Good

Leavenworth County, Kansas · 4.5S 2.0W of Tonganoxie · Structure no. 000521057504320

Built
1993
32 years old
Condition
Good
inspected August 2024
Type
Slab
Concrete Continuous
Length
133 ft
3 main spans
Daily traffic
40
2024 count
Owner
County
County Highway Agency

About this bridge

R-21 234th Street over Nine Mile Creek is a concrete continuous slab carrying R-21 234th Street over Nine Mile Creek in Leavenworth County, Kansas. It was built in 1993, so it is 32 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 16% of them trucks, projected to reach 121 by 2042. The structure is 133 ft (40.5 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesR-21 234th Street
CrossesNine Mile Creek
Location4.5S 2.0W of Tonganoxie
RouteCounty Highway 0
StateKansas
Coordinates39.0441, -95.12139
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 alignment8: Equal to present desirable criteria
Operating rating82.9 US tons
Inventory rating49.6 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length133 ft (40.5 m)
Longest span51 ft (15.6 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic40 (2024)
Projected traffic121 by 2042
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 R-21 234th Street over Nine Mile Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is R-21 234th Street over Nine Mile Creek 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 2024.

How much traffic does R-21 234th Street over Nine Mile Creek carry?

About 40 vehicles per day (2024 count), of which roughly 16% are trucks.

How long is R-21 234th Street over Nine Mile Creek?

The structure is 133 ft (40.5 m) long with a longest span of 51 ft (15.6 m) and a deck 26 ft wide.

Who owns R-21 234th Street over Nine Mile Creek?

It is owned by the County Highway Agency.