US Bridges

4600 St. 23.0-B.4 over Middle Creek

Fair

Allen County, Kansas · 0.5S 3.0E of Mildred · Structure no. 000011061005724

Built
1959
66 years old
Condition
Fair
inspected February 2024
Type
Tee Beam
Concrete Continuous
Length
146 ft
3 main spans
Daily traffic
60
2006 count
Owner
County
County Highway Agency

About this bridge

4600 St. 23.0-B.4 over Middle Creek is a concrete continuous tee beam carrying 4600 St. 23.0-B.4 over Middle Creek in Allen County, Kansas. It was built in 1959, so it is 66 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 6 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 60 vehicles a day, projected to reach 60 by 2044. The structure is 146 ft (44.5 m) long and 27 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries4600 St. 23.0-B.4
CrossesMiddle Creek
Location0.5S 3.0E of Mildred
RouteCounty Highway 127
CountyAllen County
StateKansas
Coordinates38.01717, -95.115
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30.8 US tons
Inventory rating18.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length146 ft (44.5 m)
Longest span55 ft (16.7 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 traffic60 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$383,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 4600 St. 23.0-B.4 over Middle Creek built?

It was built in 1959, making it 66 years old in 2025.

What condition is 4600 St. 23.0-B.4 over Middle 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 February 2024.

How much traffic does 4600 St. 23.0-B.4 over Middle Creek carry?

About 60 vehicles per day (2006 count).

How long is 4600 St. 23.0-B.4 over Middle Creek?

The structure is 146 ft (44.5 m) long with a longest span of 55 ft (16.7 m) and a deck 27 ft wide.

Who owns 4600 St. 23.0-B.4 over Middle Creek?

It is owned by the County Highway Agency.