US Bridges

NW 170 Ave over Gene Creek

PoorPosted for load

Harper County, Kansas · 6.5W 1.0N of Attica · Structure no. 000390709006763

Built
1948
77 years old
Condition
Poor
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
35 ft
2 main spans
Daily traffic
20
2021 count
Owner
County
County Highway Agency

About this bridge

NW 170 Ave over Gene Creek is a wood or timber stringer/multi-beam or girder carrying NW 170 Ave over Gene Creek in Harper County, Kansas. It was built in 1948, so it is 77 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 20 vehicles a day, roughly 20% of them trucks, projected to reach 20 by 2043. The structure is 35 ft (10.7 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNW 170 Ave
CrossesGene Creek
Location6.5W 1.0N of Attica
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.26406, -98.34897
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, 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
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating28.2 US tons
Inventory rating20.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span16 ft (4.9 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic20 (2021)
Projected traffic20 by 2043
Trucks20%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 proposedNone recorded
Estimated improvement cost$260,000
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 170 Ave over Gene Creek built?

It was built in 1948, making it 77 years old in 2025.

What condition is NW 170 Ave over Gene Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2023.

How much traffic does NW 170 Ave over Gene Creek carry?

About 20 vehicles per day (2021 count), of which roughly 20% are trucks.

How long is NW 170 Ave over Gene Creek?

The structure is 35 ft (10.7 m) long with a longest span of 16 ft (4.9 m) and a deck 20 ft wide.

Who owns NW 170 Ave over Gene Creek?

It is owned by the County Highway Agency.