US Bridges

3900 RD Mile 5 over Onion Creek

Fair

Montgomery County, Kansas · 0.2S of Dearing · Structure no. 000000000630320

Built
1953
72 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
219 ft
4 main spans
Daily traffic
2,848
2010 count
Owner
County
County Highway Agency

About this bridge

3900 RD Mile 5 over Onion Creek is a steel continuous stringer/multi-beam or girder carrying 3900 RD Mile 5 over Onion Creek in Montgomery County, Kansas. It was built in 1953, so it is 72 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.

It carries about 2,848 vehicles a day, roughly 7% of them trucks, projected to reach 3,418 by 2039. The structure is 219 ft (66.7 m) long and 28 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries3900 RD Mile 5
CrossesOnion Creek
Location0.2S of Dearing
RouteCounty Highway 475
CountyMontgomery County
StateKansas
Coordinates37.05181, -95.71052
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37 US tons
Inventory rating21.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length219 ft (66.7 m)
Longest span60 ft (18.2 m)
Deck width28 ft (8.6 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic2,848 (2010)
Projected traffic3,418 by 2039
Trucks7%
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$600,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 3900 RD Mile 5 over Onion Creek built?

It was built in 1953, making it 72 years old in 2025.

What condition is 3900 RD Mile 5 over Onion 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 March 2023.

How much traffic does 3900 RD Mile 5 over Onion Creek carry?

About 2,848 vehicles per day (2010 count), of which roughly 7% are trucks.

How long is 3900 RD Mile 5 over Onion Creek?

The structure is 219 ft (66.7 m) long with a longest span of 60 ft (18.2 m) and a deck 28 ft wide.

Who owns 3900 RD Mile 5 over Onion Creek?

It is owned by the County Highway Agency.