US Bridges

Robson Road over Darnells Creek

FairPosted for load

Pottawatomie County, Kansas · 1.5N 1.0E of Westmoreland · Structure no. 000750921003807

Built
1930
95 years old
Condition
Fair
inspected August 2023
Type
Girder and Floorbeam System
Steel
Length
52 ft
1 main span
Daily traffic
10
2013 count
Owner
County
County Highway Agency

About this bridge

Robson Road over Darnells Creek is a steel girder and floorbeam system carrying Robson Road over Darnells Creek in Pottawatomie County, Kansas. It was built in 1930, so it is 95 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 6 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 10 vehicles a day, projected to reach 15 by 2043. The structure is 52 ft (15.8 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesRobson Road
CrossesDarnells Creek
Location1.5N 1.0E of Westmoreland
RouteCounty Highway 0
CountyPottawatomie County
StateKansas
Coordinates39.40973, -96.38894
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
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 geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating20.9 US tons
Inventory rating12.5 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span47 ft (14.2 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2013)
Projected traffic15 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$340,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Robson Road over Darnells Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Robson Road over Darnells 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 August 2023.

How much traffic does Robson Road over Darnells Creek carry?

About 10 vehicles per day (2013 count).

How long is Robson Road over Darnells Creek?

The structure is 52 ft (15.8 m) long with a longest span of 47 ft (14.2 m) and a deck 16 ft wide.

Who owns Robson Road over Darnells Creek?

It is owned by the County Highway Agency.