US Bridges

Onaga Road North over French Creek

FairPosted for load

Pottawatomie County, Kansas · 1.6N of Onaga · Structure no. 000000000750070

Built
1975
50 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
164 ft
3 main spans
Daily traffic
512
2013 count
Owner
County
County Highway Agency

About this bridge

Onaga Road North over French Creek is a prestressed concrete continuous tee beam carrying Onaga Road North over French Creek in Pottawatomie County, Kansas. It was built in 1975, so it is 50 years old, younger 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 512 vehicles a day, projected to reach 614 by 2043. The structure is 164 ft (50 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOnaga Road North
CrossesFrench Creek
Location1.6N of Onaga
RouteCounty Highway 483
CountyPottawatomie County
StateKansas
Coordinates39.5202, -96.16521
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating21.3 US tons
Inventory rating12.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length164 ft (50 m)
Longest span54 ft (16.4 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic512 (2013)
Projected traffic614 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Onaga Road North over French Creek built?

It was built in 1975, making it 50 years old in 2025.

What condition is Onaga Road North over French 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 September 2023.

How much traffic does Onaga Road North over French Creek carry?

About 512 vehicles per day (2013 count).

How long is Onaga Road North over French Creek?

The structure is 164 ft (50 m) long with a longest span of 54 ft (16.4 m) and a deck 30 ft wide.

Who owns Onaga Road North over French Creek?

It is owned by the County Highway Agency.