US Bridges

NW 90 RD 8.0-O.8 over Stream

Good

Harper County, Kansas · 3.0W of Harper · Structure no. 000390737806740

Built
1970
55 years old
Condition
Good
inspected April 2023
Type
Culvert
Concrete
Length
29 ft
3 main spans
Daily traffic
30
2021 count
Owner
County
County Highway Agency

About this bridge

NW 90 RD 8.0-O.8 over Stream is a concrete culvert carrying NW 90 RD 8.0-O.8 over Stream in Harper County, Kansas. It was built in 1970, so it is 55 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 30 vehicles a day, projected to reach 30 by 2043. The structure is 29 ft (8.8 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 90 RD 8.0-O.8
CrossesStream
Location3.0W of Harper
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.2824, -98.07992
Functional classRural Local

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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span8 ft (2.4 m)
Deck width24 ft (7.3 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2021)
Projected traffic30 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 90 RD 8.0-O.8 over Stream built?

It was built in 1970, making it 55 years old in 2025.

What condition is NW 90 RD 8.0-O.8 over Stream 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 April 2023.

How much traffic does NW 90 RD 8.0-O.8 over Stream carry?

About 30 vehicles per day (2021 count).

How long is NW 90 RD 8.0-O.8 over Stream?

The structure is 29 ft (8.8 m) long with a longest span of 8 ft (2.4 m) and a deck 24 ft wide.

Who owns NW 90 RD 8.0-O.8 over Stream?

It is owned by the County Highway Agency.