US Bridges

Iris Rd. over North Big Creek

Good

Coffey County, Kansas · I.0-7.6 · Structure no. 000160985005563

Built
1981
44 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
71 ft
1 main span
Daily traffic
25
2013 count
Owner
County
County Highway Agency

About this bridge

Iris Rd. over North Big Creek is a steel stringer/multi-beam or girder carrying Iris Rd. over North Big Creek in Coffey County, Kansas. It was built in 1981, so it is 44 years old, younger 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.

It carries about 25 vehicles a day, roughly 5% of them trucks, projected to reach 30 by 2044. The structure is 71 ft (21.6 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesIris Rd.
CrossesNorth Big Creek
LocationI.0-7.6
RouteCounty Highway 0
CountyCoffey County
StateKansas
Coordinates38.13597, -95.81184
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating40.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length71 ft (21.6 m)
Longest span70 ft (21.3 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic25 (2013)
Projected traffic30 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Iris Rd. over North Big Creek built?

It was built in 1981, making it 44 years old in 2025.

What condition is Iris Rd. over North Big 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 April 2024.

How much traffic does Iris Rd. over North Big Creek carry?

About 25 vehicles per day (2013 count), of which roughly 5% are trucks.

How long is Iris Rd. over North Big Creek?

The structure is 71 ft (21.6 m) long with a longest span of 70 ft (21.3 m) and a deck 24 ft wide.

Who owns Iris Rd. over North Big Creek?

It is owned by the County Highway Agency.