US Bridges

Rs 1078 23.6-A.0 over Cottonwood River

FairPosted for load

Lyon County, Kansas · 1.0S 1.5W of Plymouth · Structure no. 000000000560420

Built
1961
64 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
364 ft
4 main spans
Daily traffic
110
2007 count
Owner
County
County Highway Agency

About this bridge

Rs 1078 23.6-A.0 over Cottonwood River is a steel continuous stringer/multi-beam or girder carrying Rs 1078 23.6-A.0 over Cottonwood River in Lyon County, Kansas. It was built in 1961, so it is 64 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 6 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 110 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2043. The structure is 364 ft (110.8 m) long and 26 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesRs 1078 23.6-A.0
CrossesCottonwood River
Location1.0S 1.5W of Plymouth
RouteCounty Highway 1078
CountyLyon County
StateKansas
Coordinates38.39778, -96.35667
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 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 alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 15
Structure length364 ft (110.8 m)
Longest span100 ft (30.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic110 (2007)
Projected traffic120 by 2043
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 1078 23.6-A.0 over Cottonwood River built?

It was built in 1961, making it 64 years old in 2025.

What condition is Rs 1078 23.6-A.0 over Cottonwood 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 February 2023.

How much traffic does Rs 1078 23.6-A.0 over Cottonwood River carry?

About 110 vehicles per day (2007 count), of which roughly 10% are trucks.

How long is Rs 1078 23.6-A.0 over Cottonwood River?

The structure is 364 ft (110.8 m) long with a longest span of 100 ft (30.4 m) and a deck 26 ft wide.

Who owns Rs 1078 23.6-A.0 over Cottonwood River?

It is owned by the County Highway Agency.