US Bridges

NW 90 RD 8.0-K.1 over East Branch Bluff Creek

FairPosted for load

Harper County, Kansas · 7.0W of Harper · Structure no. 000390729106740

Built
1967
58 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
96 ft
5 main spans
Daily traffic
10
2021 count
Owner
County
County Highway Agency

About this bridge

NW 90 RD 8.0-K.1 over East Branch Bluff Creek is a wood or timber stringer/multi-beam or girder carrying NW 90 RD 8.0-K.1 over East Branch Bluff Creek in Harper County, Kansas. It was built in 1967, so it is 58 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 6 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 10 by 2043. The structure is 96 ft (29.3 m) long and 20 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNW 90 RD 8.0-K.1
CrossesEast Branch Bluff Creek
Location7.0W of Harper
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.28274, -98.16583
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
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 alignment8: Equal to present desirable criteria
Operating rating11.8 US tons
Inventory rating5.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckConcrete, cast-in-place
Main spans5
Design loadUnknown
Structure length96 ft (29.3 m)
Longest span19 ft (5.8 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2021)
Projected traffic10 by 2043
Trucks10%
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 statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$118,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 90 RD 8.0-K.1 over East Branch Bluff Creek built?

It was built in 1967, making it 58 years old in 2025.

What condition is NW 90 RD 8.0-K.1 over East Branch Bluff 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 90 RD 8.0-K.1 over East Branch Bluff Creek carry?

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

How long is NW 90 RD 8.0-K.1 over East Branch Bluff Creek?

The structure is 96 ft (29.3 m) long with a longest span of 19 ft (5.8 m) and a deck 20 ft wide.

Who owns NW 90 RD 8.0-K.1 over East Branch Bluff Creek?

It is owned by the County Highway Agency.