US Bridges

US56 HWY over Allen Creek

Good

Lyon County, Kansas · 7.03 MI E Morris Coln · Structure no. 999905600560291

Built
1942
83 years old
Condition
Good
inspected May 2023
Type
Culvert
Concrete
Length
31 ft
2 main spans
Daily traffic
995
2023 count
Owner
State
State Highway Agency

About this bridge

US56 HWY over Allen Creek is a concrete culvert carrying US56 HWY over Allen Creek in Lyon County, Kansas. It was built in 1942, so it is 83 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.

It carries about 995 vehicles a day, roughly 29% of them trucks, projected to reach 1,099 by 2044. The structure is 31 ft (9.4 m) long and 34 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

Location

Open in Google Maps
CarriesUS56 HWY
CrossesAllen Creek
Location7.03 MI E Morris Coln
RouteU.S. Route 56
CountyLyon County
StateKansas
Coordinates38.65889, -96.225
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating43 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length31 ft (9.4 m)
Longest span14 ft (4.3 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic995 (2023)
Projected traffic1,099 by 2044
Trucks29%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US56 HWY over Allen Creek built?

It was built in 1942, making it 83 years old in 2025.

What condition is US56 HWY over Allen 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 May 2023.

How much traffic does US56 HWY over Allen Creek carry?

About 995 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is US56 HWY over Allen Creek?

The structure is 31 ft (9.4 m) long with a longest span of 14 ft (4.3 m) and a deck 34 ft wide.

Who owns US56 HWY over Allen Creek?

It is owned by the State Highway Agency.