US Bridges

NW 70 RD G.7-10.0 over West Branch Bluff Creek

FairPosted for load

Harper County, Kansas · 1.0N of Attica · Structure no. 000390721706780

Built
1959
66 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
50 ft
3 main spans
Daily traffic
50
2021 count
Owner
County
County Highway Agency

About this bridge

NW 70 RD G.7-10.0 over West Branch Bluff Creek is a wood or timber stringer/multi-beam or girder carrying NW 70 RD G.7-10.0 over West Branch Bluff Creek in Harper County, Kansas. It was built in 1959, so it is 66 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 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 50 vehicles a day, roughly 5% of them trucks, projected to reach 50 by 2043. The structure is 50 ft (15.2 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNW 70 RD G.7-10.0
CrossesWest Branch Bluff Creek
Location1.0N of Attica
RouteCounty Highway 0
CountyHarper County
StateKansas
Coordinates37.25404, -98.22531
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15.3 US tons
Inventory rating10.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span16 ft (4.9 m)
Deck width19 ft (5.7 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2021)
Projected traffic50 by 2043
Trucks5%
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 statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$102,000
NavigationNo navigation control on waterway

Frequently asked questions

When was NW 70 RD G.7-10.0 over West Branch Bluff Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is NW 70 RD G.7-10.0 over West 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 70 RD G.7-10.0 over West Branch Bluff Creek carry?

About 50 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is NW 70 RD G.7-10.0 over West Branch Bluff Creek?

The structure is 50 ft (15.2 m) long with a longest span of 16 ft (4.9 m) and a deck 19 ft wide.

Who owns NW 70 RD G.7-10.0 over West Branch Bluff Creek?

It is owned by the County Highway Agency.