US Bridges

ST-51 206th Street over Unnamed Stream

Fair

Leavenworth County, Kansas · 0.7E 0.7S of Tonganoxie · Structure no. 000000000520440

Built
1962
63 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
690
2020 count
Owner
County
County Highway Agency

About this bridge

ST-51 206th Street over Unnamed Stream is a concrete culvert carrying ST-51 206th Street over Unnamed Stream in Leavenworth County, Kansas. It was built in 1962, so it is 63 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 5 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 690 vehicles a day, roughly 11% of them trucks, projected to reach 1,074 by 2042. The structure is 24 ft (7.3 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesST-51 206th Street
CrossesUnnamed Stream
Location0.7E 0.7S of Tonganoxie
RouteCounty Highway 1847
CountyLeavenworth County
StateKansas
Coordinates39.09228, -95.05632
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.1 US tons
Inventory rating39.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length24 ft (7.3 m)
Longest span24 ft (7.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic690 (2020)
Projected traffic1,074 by 2042
Trucks11%
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 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 ST-51 206th Street over Unnamed Stream built?

It was built in 1962, making it 63 years old in 2025.

What condition is ST-51 206th Street over Unnamed Stream 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 August 2024.

How much traffic does ST-51 206th Street over Unnamed Stream carry?

About 690 vehicles per day (2020 count), of which roughly 11% are trucks.

How long is ST-51 206th Street over Unnamed Stream?

The structure is 24 ft (7.3 m) long with a longest span of 24 ft (7.3 m).

Who owns ST-51 206th Street over Unnamed Stream?

It is owned by the County Highway Agency.