US Bridges

Rs 70 Prairie Rd. over Unnamed Stream

Fair

Brown County, Kansas · 0.3N 1.0W of Robinson · Structure no. 000000000070035

Built
1989
36 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
59 ft
2 main spans
Daily traffic
398
2016 count
Owner
County
County Highway Agency

About this bridge

Rs 70 Prairie Rd. over Unnamed Stream is a steel continuous stringer/multi-beam or girder carrying Rs 70 Prairie Rd. over Unnamed Stream in Brown County, Kansas. It was built in 1989, so it is 36 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 398 vehicles a day, roughly 10% of them trucks, projected to reach 437 by 2044. The structure is 59 ft (18.1 m) long and 28 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesRs 70 Prairie Rd.
CrossesUnnamed Stream
Location0.3N 1.0W of Robinson
RouteCounty Highway 70
CountyBrown County
StateKansas
Coordinates39.89822, -95.43407
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to 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 rating83.3 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckCorrugated steel
Main spans2
Design loadH 20
Structure length59 ft (18.1 m)
Longest span39 ft (11.8 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic398 (2016)
Projected traffic437 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Rs 70 Prairie Rd. over Unnamed Stream built?

It was built in 1989, making it 36 years old in 2025.

What condition is Rs 70 Prairie Rd. over Unnamed 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 January 2024.

How much traffic does Rs 70 Prairie Rd. over Unnamed Stream carry?

About 398 vehicles per day (2016 count), of which roughly 10% are trucks.

How long is Rs 70 Prairie Rd. over Unnamed Stream?

The structure is 59 ft (18.1 m) long with a longest span of 39 ft (11.8 m) and a deck 28 ft wide.

Who owns Rs 70 Prairie Rd. over Unnamed Stream?

It is owned by the County Highway Agency.