US Bridges

Rs 597 over S. Fork Ninnescah River

PoorPosted for load

Sedgwick County, Kansas · 375THW 0.8 N of 55THS · Structure no. 000000000870070

Built
1955
70 years old, rebuilt 2007
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
583 ft
7 main spans
Daily traffic
618
2022 count
Owner
County
County Highway Agency

About this bridge

Rs 597 over S. Fork Ninnescah River is a steel continuous stringer/multi-beam or girder carrying Rs 597 over S. Fork Ninnescah River in Sedgwick County, Kansas. It was built in 1955 and reconstructed in 2007, so it is 70 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 618 vehicles a day, roughly 22% of them trucks, projected to reach 754 by 2044. The structure is 583 ft (177.7 m) long and 29 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesRs 597
CrossesS. Fork Ninnescah River
Location375THW 0.8 N of 55THS
RouteCounty Highway 597
StateKansas
Coordinates37.60086, -97.77262
Functional classRural Minor Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating42.7 US tons
Inventory rating25.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadH 20
Structure length583 ft (177.7 m)
Longest span88 ft (26.7 m)
Deck width29 ft (8.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic618 (2022)
Projected traffic754 by 2044
Trucks22%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1 million (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rs 597 over S. Fork Ninnescah River built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2007.

What condition is Rs 597 over S. Fork Ninnescah River 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 July 2024.

How much traffic does Rs 597 over S. Fork Ninnescah River carry?

About 618 vehicles per day (2022 count), of which roughly 22% are trucks.

How long is Rs 597 over S. Fork Ninnescah River?

The structure is 583 ft (177.7 m) long with a longest span of 88 ft (26.7 m) and a deck 29 ft wide.

Who owns Rs 597 over S. Fork Ninnescah River?

It is owned by the County Highway Agency.