US Bridges

311th Street over Trib. Marais Des Cygnes

FairPosted for load

Miami County, Kansas · 7.4W 0.6S of Paola · Structure no. 000611069604980

Built
1935
90 years old, rebuilt 1981
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
30 ft
2 main spans
Daily traffic
30
2011 count
Owner
County
County Highway Agency

About this bridge

311th Street over Trib. Marais Des Cygnes is a steel continuous stringer/multi-beam or girder carrying 311th Street over Trib. Marais Des Cygnes in Miami County, Kansas. It was built in 1935 and reconstructed in 1981, so it is 90 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 30 vehicles a day, projected to reach 51 by 2043. The structure is 30 ft (9.1 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries311th Street
CrossesTrib. Marais Des Cygnes
Location7.4W 0.6S of Paola
RouteCounty Highway 0
CountyMiami County
StateKansas
Coordinates38.56434, -95.01719
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating28 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span15 ft (4.6 m)
Deck width26 ft (7.9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2011)
Projected traffic51 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was 311th Street over Trib. Marais Des Cygnes built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1981.

What condition is 311th Street over Trib. Marais Des Cygnes 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 2023.

How much traffic does 311th Street over Trib. Marais Des Cygnes carry?

About 30 vehicles per day (2011 count).

How long is 311th Street over Trib. Marais Des Cygnes?

The structure is 30 ft (9.1 m) long with a longest span of 15 ft (4.6 m) and a deck 26 ft wide.

Who owns 311th Street over Trib. Marais Des Cygnes?

It is owned by the County Highway Agency.