US Bridges

NW 90th Ave over Cottonwood Creek

FairPosted for load

Harper County, Kansas · 2.6W 1.0N of Attica · Structure no. 000390715906760

Built
1958
67 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
69 ft
4 main spans
Daily traffic
10
2021 count
Owner
County
County Highway Agency

About this bridge

NW 90th Ave over Cottonwood Creek is a wood or timber stringer/multi-beam or girder carrying NW 90th Ave over Cottonwood Creek in Harper County, Kansas. It was built in 1958, so it is 67 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 10 vehicles a day, roughly 10% of them trucks, projected to reach 12 by 2043. The structure is 69 ft (21 m) long and 18 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNW 90th Ave
CrossesCottonwood Creek
Location2.6W 1.0N of Attica
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.26805, -98.27789
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating4.6 US tons
Inventory rating3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans4
Design loadUnknown
Structure length69 ft (21 m)
Longest span17 ft (5.1 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2021)
Projected traffic12 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$710,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 90th Ave over Cottonwood Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is NW 90th Ave over Cottonwood Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2023.

How much traffic does NW 90th Ave over Cottonwood Creek carry?

About 10 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is NW 90th Ave over Cottonwood Creek?

The structure is 69 ft (21 m) long with a longest span of 17 ft (5.1 m) and a deck 18 ft wide.

Who owns NW 90th Ave over Cottonwood Creek?

It is owned by the County Highway Agency.