US Bridges

Rs 1121 N.4-30.0 over Stream

GoodPosted for load

Lyon County, Kansas · 4.0S 1.9E of Olpe · Structure no. 000000000560515

Built
1930
95 years old
Condition
Good
inspected February 2023
Type
Culvert
Concrete
Length
25 ft
3 main spans
Daily traffic
64
2007 count
Owner
County
County Highway Agency

About this bridge

Rs 1121 N.4-30.0 over Stream is a concrete culvert carrying Rs 1121 N.4-30.0 over Stream in Lyon County, Kansas. It was built in 1930, so it is 95 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 64 vehicles a day, projected to reach 75 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRs 1121 N.4-30.0
CrossesStream
Location4.0S 1.9E of Olpe
RouteCounty Highway 1121
CountyLyon County
StateKansas
Coordinates38.201, -96.13464
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating25 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span8 ft (2.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic64 (2007)
Projected traffic75 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Rs 1121 N.4-30.0 over Stream built?

It was built in 1930, making it 95 years old in 2025.

What condition is Rs 1121 N.4-30.0 over Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2023.

How much traffic does Rs 1121 N.4-30.0 over Stream carry?

About 64 vehicles per day (2007 count).

How long is Rs 1121 N.4-30.0 over Stream?

The structure is 25 ft (7.6 m) long with a longest span of 8 ft (2.4 m).

Who owns Rs 1121 N.4-30.0 over Stream?

It is owned by the County Highway Agency.