US Bridges

SW 90 St. H.8-16.0 over Allen Creek

PoorPosted for load

Kingman County, Kansas · 1.0W of Willowdale · Structure no. 000480711806420

Built
1945
80 years old
Condition
Poor
inspected January 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
78 ft
4 main spans
Daily traffic
30
2021 count
Owner
County
County Highway Agency

About this bridge

SW 90 St. H.8-16.0 over Allen Creek is a wood or timber stringer/multi-beam or girder carrying SW 90 St. H.8-16.0 over Allen Creek in Kingman County, Kansas. It was built in 1945, so it is 80 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 30 vehicles a day, roughly 3% of them trucks, projected to reach 35 by 2043. The structure is 78 ft (23.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSW 90 St. H.8-16.0
CrossesAllen Creek
Location1.0W of Willowdale
RouteCounty Highway 0
StateKansas
Coordinates37.51508, -98.32122
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating8.6 US tons
Inventory rating5.2 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length78 ft (23.8 m)
Longest span19 ft (5.7 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2021)
Projected traffic35 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$330,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SW 90 St. H.8-16.0 over Allen Creek built?

It was built in 1945, making it 80 years old in 2025.

What condition is SW 90 St. H.8-16.0 over Allen Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in January 2023.

How much traffic does SW 90 St. H.8-16.0 over Allen Creek carry?

About 30 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is SW 90 St. H.8-16.0 over Allen Creek?

The structure is 78 ft (23.8 m) long with a longest span of 19 ft (5.7 m) and a deck 24 ft wide.

Who owns SW 90 St. H.8-16.0 over Allen Creek?

It is owned by the County Highway Agency.