US Bridges

S. 120th Ave. over Coon Creek

FairPosted for load

Osborne County, Kansas · 18.0S 1.0W of Osborne · Structure no. 000710673004140

Built
1951
74 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
41 ft
2 main spans
Daily traffic
25
2020 count
Owner
County
County Highway Agency

About this bridge

S. 120th Ave. over Coon Creek is a wood or timber stringer/multi-beam or girder carrying S. 120th Ave. over Coon Creek in Osborne County, Kansas. It was built in 1951, so it is 74 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. Its operating status is: posted for load restriction.

It carries about 25 vehicles a day, projected to reach 25 by 2043. The structure is 41 ft (12.5 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesS. 120th Ave.
CrossesCoon Creek
Location18.0S 1.0W of Osborne
RouteCounty Highway 0
CountyOsborne County
StateKansas
Coordinates39.17693, -98.71333
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
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 geometry5: 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 rating28.7 US tons
Inventory rating21.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadH 15
Structure length41 ft (12.5 m)
Longest span19 ft (5.7 m)
Deck width23 ft (6.9 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic25 (2020)
Projected traffic25 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$180,000
NavigationNo navigation control on waterway

Frequently asked questions

When was S. 120th Ave. over Coon Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is S. 120th Ave. over Coon 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 August 2024.

How much traffic does S. 120th Ave. over Coon Creek carry?

About 25 vehicles per day (2020 count).

How long is S. 120th Ave. over Coon Creek?

The structure is 41 ft (12.5 m) long with a longest span of 19 ft (5.7 m) and a deck 23 ft wide.

Who owns S. 120th Ave. over Coon Creek?

It is owned by the County Highway Agency.