US Bridges

Local Rd. F-21 over S. Fork Big Nemaha Riv.

Fair

Nemaha County, Kansas · 2.5N 5.5W of Oneida · Structure no. 000660957503140

Built
2005
20 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
168 ft
3 main spans
Daily traffic
10
2008 count
Owner
County
County Highway Agency

About this bridge

Local Rd. F-21 over S. Fork Big Nemaha Riv. is a steel stringer/multi-beam or girder carrying Local Rd. F-21 over S. Fork Big Nemaha Riv. in Nemaha County, Kansas. It was built in 2005, so it is 20 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.

It carries about 10 vehicles a day, projected to reach 15 by 2044. The structure is 168 ft (51.2 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesLocal Rd. F-21
CrossesS. Fork Big Nemaha Riv.
Location2.5N 5.5W of Oneida
RouteCounty Highway 0
CountyNemaha County
StateKansas
Coordinates39.89957, -96.0421
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.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.6 US tons
Inventory rating39.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length168 ft (51.2 m)
Longest span87 ft (26.5 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2008)
Projected traffic15 by 2044
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$201,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Local Rd. F-21 over S. Fork Big Nemaha Riv. built?

It was built in 2005, making it 20 years old in 2025.

What condition is Local Rd. F-21 over S. Fork Big Nemaha Riv. 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 March 2024.

How much traffic does Local Rd. F-21 over S. Fork Big Nemaha Riv. carry?

About 10 vehicles per day (2008 count).

How long is Local Rd. F-21 over S. Fork Big Nemaha Riv.?

The structure is 168 ft (51.2 m) long with a longest span of 87 ft (26.5 m) and a deck 20 ft wide.

Who owns Local Rd. F-21 over S. Fork Big Nemaha Riv.?

It is owned by the County Highway Agency.