US Bridges

Red Rock over N. Fork Ninnescah River

FairPosted for load

Reno County, Kansas · 0.6E 1.1S of Sylvia · Structure no. 000780705205840

Built
1978
47 years old, rebuilt 2021
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
46 ft
3 main spans
Daily traffic
10
2021 count
Owner
County
County Highway Agency

About this bridge

Red Rock over N. Fork Ninnescah River is a wood or timber stringer/multi-beam or girder carrying Red Rock over N. Fork Ninnescah River in Reno County, Kansas. It was built in 1978 and reconstructed in 2021, so it is 47 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 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 10 vehicles a day, roughly 5% of them trucks, projected to reach 10 by 2046. The structure is 46 ft (14.1 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesRed Rock
CrossesN. Fork Ninnescah River
Location0.6E 1.1S of Sylvia
RouteCounty Highway 0
CountyReno County
StateKansas
Coordinates37.94107, -98.39624
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 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 adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.8 US tons
Inventory rating25.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length46 ft (14.1 m)
Longest span15 ft (4.6 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2021)
Projected traffic10 by 2046
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 proposedNone recorded
Estimated improvement cost$390,000 (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Red Rock over N. Fork Ninnescah River built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2021.

What condition is Red Rock over N. Fork Ninnescah River 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 July 2024.

How much traffic does Red Rock over N. Fork Ninnescah River carry?

About 10 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Red Rock over N. Fork Ninnescah River?

The structure is 46 ft (14.1 m) long with a longest span of 15 ft (4.6 m) and a deck 24 ft wide.

Who owns Red Rock over N. Fork Ninnescah River?

It is owned by the County Highway Agency.