US Bridges

Z.4-18 Minor over Coal Creek

Good

Ottawa County, Kansas · 6.0N of Niles · Structure no. 000720807404300

Built
1994
31 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
80 ft
3 main spans
Daily traffic
30
2001 count
Owner
County
County Highway Agency

About this bridge

Z.4-18 Minor over Coal Creek is a steel continuous stringer/multi-beam or girder carrying Z.4-18 Minor over Coal Creek in Ottawa County, Kansas. It was built in 1994, so it is 31 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 30 vehicles a day, projected to reach 30 by 2044. The structure is 80 ft (24.4 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesZ.4-18 Minor
CrossesCoal Creek
Location6.0N of Niles
RouteCounty Highway 7206
StateKansas
Coordinates39.05979, -97.45792
Functional classRural Minor 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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.3 US tons
Inventory rating34.3 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span32 ft (9.8 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2001)
Projected traffic30 by 2044
Trucks0%
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 Z.4-18 Minor over Coal Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is Z.4-18 Minor over Coal 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 March 2024.

How much traffic does Z.4-18 Minor over Coal Creek carry?

About 30 vehicles per day (2001 count).

How long is Z.4-18 Minor over Coal Creek?

The structure is 80 ft (24.4 m) long with a longest span of 32 ft (9.8 m) and a deck 26 ft wide.

Who owns Z.4-18 Minor over Coal Creek?

It is owned by the County Highway Agency.