US Bridges

RD 320 947.6-490 over Duck Creek

Fair

Lyon County, Kansas · 2.0S 1.6E of Allen · Structure no. 000560947604900

Built
1994
31 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
24 ft
1 main span
Daily traffic
45
2007 count
Owner
County
County Highway Agency

About this bridge

RD 320 947.6-490 over Duck Creek is a steel stringer/multi-beam or girder carrying RD 320 947.6-490 over Duck Creek in Lyon County, Kansas. It was built in 1994, so it is 31 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 45 vehicles a day, projected to reach 50 by 2043. The structure is 24 ft (7.3 m) long and 24 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRD 320 947.6-490
CrossesDuck Creek
Location2.0S 1.6E of Allen
RouteCounty Highway 0
CountyLyon County
StateKansas
Coordinates38.62236, -96.141
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
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 rating64.2 US tons
Inventory rating38.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length24 ft (7.3 m)
Longest span23 ft (7 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic45 (2007)
Projected traffic50 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 RD 320 947.6-490 over Duck Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is RD 320 947.6-490 over Duck Creek 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 RD 320 947.6-490 over Duck Creek carry?

About 45 vehicles per day (2007 count).

How long is RD 320 947.6-490 over Duck Creek?

The structure is 24 ft (7.3 m) long with a longest span of 23 ft (7 m) and a deck 24 ft wide.

Who owns RD 320 947.6-490 over Duck Creek?

It is owned by the County Highway Agency.