US Bridges

Carnahan Road over Carnahan Creek

GoodPosted for load

Pottawatomie County, Kansas · 6.0S of Olsburg · Structure no. 000000000750360

Built
1966
59 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
211 ft
3 main spans
Daily traffic
310
2013 count
Owner
County
County Highway Agency

About this bridge

Carnahan Road over Carnahan Creek is a steel continuous stringer/multi-beam or girder carrying Carnahan Road over Carnahan Creek in Pottawatomie County, Kansas. It was built in 1966, so it is 59 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 310 vehicles a day, projected to reach 372 by 2043. The structure is 211 ft (64.3 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesCarnahan Road
CrossesCarnahan Creek
Location6.0S of Olsburg
RouteCounty Highway 1208
CountyPottawatomie County
StateKansas
Coordinates39.35002, -96.62267
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating34.6 US tons
Inventory rating20.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length211 ft (64.3 m)
Longest span80 ft (24.4 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic310 (2013)
Projected traffic372 by 2043
Trucks0%
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 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 Carnahan Road over Carnahan Creek built?

It was built in 1966, making it 59 years old in 2025.

What condition is Carnahan Road over Carnahan Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Carnahan Road over Carnahan Creek carry?

About 310 vehicles per day (2013 count).

How long is Carnahan Road over Carnahan Creek?

The structure is 211 ft (64.3 m) long with a longest span of 80 ft (24.4 m) and a deck 27 ft wide.

Who owns Carnahan Road over Carnahan Creek?

It is owned by the County Highway Agency.