US Bridges

NW 70 RD over Stream

FairPosted for load

Harper County, Kansas · 1.0N 7.0E of Attica · Structure no. 000390735906780

Built
1980
45 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
101 ft
5 main spans
Daily traffic
20
2021 count
Owner
County
County Highway Agency

About this bridge

NW 70 RD over Stream is a steel continuous stringer/multi-beam or girder carrying NW 70 RD over Stream in Harper County, Kansas. It was built in 1980, so it is 45 years old, younger 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 20 vehicles a day, projected to reach 20 by 2043. The structure is 101 ft (30.8 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNW 70 RD
CrossesStream
Location1.0N 7.0E of Attica
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.25358, -98.09658
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating31.1 US tons
Inventory rating18.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans5
Design loadUnknown
Structure length101 ft (30.8 m)
Longest span20 ft (6 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic20 (2021)
Projected traffic20 by 2043
Trucks0%
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$331,000
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 70 RD over Stream built?

It was built in 1980, making it 45 years old in 2025.

What condition is NW 70 RD over Stream 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 70 RD over Stream carry?

About 20 vehicles per day (2021 count).

How long is NW 70 RD over Stream?

The structure is 101 ft (30.8 m) long with a longest span of 20 ft (6 m) and a deck 24 ft wide.

Who owns NW 70 RD over Stream?

It is owned by the County Highway Agency.