US Bridges

4600 St. 23.0-C.8 over Stream

Poor

Allen County, Kansas · 1.8S 3.0E of Mildred · Structure no. 000011061005748

Built
1930
95 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete
Length
24 ft
3 main spans
Daily traffic
60
2006 count
Owner
County
County Highway Agency

About this bridge

4600 St. 23.0-C.8 over Stream is a concrete slab carrying 4600 St. 23.0-C.8 over Stream in Allen 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 60 vehicles a day, projected to reach 65 by 2044. The structure is 24 ft (7.2 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries4600 St. 23.0-C.8
CrossesStream
Location1.8S 3.0E of Mildred
RouteCounty Highway 127
CountyAllen County
StateKansas
Coordinates37.99583, -95.11528
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

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.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating27 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length24 ft (7.2 m)
Longest span8 ft (2.4 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic60 (2006)
Projected traffic65 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$85,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 4600 St. 23.0-C.8 over Stream built?

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

What condition is 4600 St. 23.0-C.8 over Stream in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does 4600 St. 23.0-C.8 over Stream carry?

About 60 vehicles per day (2006 count).

How long is 4600 St. 23.0-C.8 over Stream?

The structure is 24 ft (7.2 m) long with a longest span of 8 ft (2.4 m) and a deck 27 ft wide.

Who owns 4600 St. 23.0-C.8 over Stream?

It is owned by the County Highway Agency.