US Bridges

NW 120 RD over Bluff Creek

Good

Harper County, Kansas · 1.2W 6.0N of Attica · Structure no. 000390719906680

Built
2006
19 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
71 ft
3 main spans
Daily traffic
10
2021 count
Owner
County
County Highway Agency

About this bridge

NW 120 RD over Bluff Creek is a steel continuous stringer/multi-beam or girder carrying NW 120 RD over Bluff Creek in Harper County, Kansas. It was built in 2006, so it is 19 years old, younger 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 10 vehicles a day, roughly 10% of them trucks, projected to reach 10 by 2043. The structure is 71 ft (21.5 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 120 RD
CrossesBluff Creek
Location1.2W 6.0N of Attica
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.32631, -98.24222
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.4 US tons
Inventory rating32 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans3
Design loadUnknown
Structure length71 ft (21.5 m)
Longest span27 ft (8.1 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 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$590,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 120 RD over Bluff Creek built?

It was built in 2006, making it 19 years old in 2025.

What condition is NW 120 RD over Bluff Creek 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 February 2023.

How much traffic does NW 120 RD over Bluff Creek carry?

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

How long is NW 120 RD over Bluff Creek?

The structure is 71 ft (21.5 m) long with a longest span of 27 ft (8.1 m) and a deck 24 ft wide.

Who owns NW 120 RD over Bluff Creek?

It is owned by the County Highway Agency.