US Bridges

Onaga Road over Jim Creek

Fair

Pottawatomie County, Kansas · 6.0S 1.0W of Onaga · Structure no. 000000000750040

Built
1987
38 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
155
2010 count
Owner
County
County Highway Agency

About this bridge

Onaga Road over Jim Creek is a concrete continuous slab carrying Onaga Road over Jim Creek in Pottawatomie County, Kansas. It was built in 1987, so it is 38 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.

It carries about 155 vehicles a day, projected to reach 186 by 2043. The structure is 113 ft (34.4 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesOnaga Road
CrossesJim Creek
Location6.0S 1.0W of Onaga
RouteCounty Highway 483
CountyPottawatomie County
StateKansas
Coordinates39.39773, -96.1856
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating80.8 US tons
Inventory rating48.4 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span44 ft (13.4 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic155 (2010)
Projected traffic186 by 2043
Trucks0%
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 Onaga Road over Jim Creek built?

It was built in 1987, making it 38 years old in 2025.

What condition is Onaga Road over Jim 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 Onaga Road over Jim Creek carry?

About 155 vehicles per day (2010 count).

How long is Onaga Road over Jim Creek?

The structure is 113 ft (34.4 m) long with a longest span of 44 ft (13.4 m) and a deck 28 ft wide.

Who owns Onaga Road over Jim Creek?

It is owned by the County Highway Agency.