US Bridges

21st RD over Negro Creek

FairPosted for load

Cowley County, Kansas · 3.0W of Arkansas City · Structure no. 000180845007049

Built
1935
90 years old
Condition
Fair
inspected January 2024
Type
Slab
Concrete Continuous
Length
30 ft
2 main spans
Daily traffic
50
2018 count
Owner
County
County Highway Agency

About this bridge

21st RD over Negro Creek is a concrete continuous slab carrying 21st RD over Negro Creek in Cowley County, Kansas. It was built in 1935, so it is 90 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, roughly 5% of them trucks, projected to reach 60 by 2044. The structure is 30 ft (9.1 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries21st RD
CrossesNegro Creek
Location3.0W of Arkansas City
RouteCounty Highway 0
CountyCowley County
StateKansas
Coordinates37.05941, -97.11211
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15 US tons
Inventory rating15 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span14 ft (4.2 m)
Deck width19 ft (5.9 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2018)
Projected traffic60 by 2044
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 21st RD over Negro Creek built?

It was built in 1935, making it 90 years old in 2025.

What condition is 21st RD over Negro Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does 21st RD over Negro Creek carry?

About 50 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is 21st RD over Negro Creek?

The structure is 30 ft (9.1 m) long with a longest span of 14 ft (4.2 m) and a deck 19 ft wide.

Who owns 21st RD over Negro Creek?

It is owned by the County Highway Agency.