US Bridges

4300 St. 21.5-A.8 over Middle Creek

Good

Allen County, Kansas · 0.2N 1.5E of Mildred · Structure no. 000011057505708

Built
2004
21 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
101 ft
3 main spans
Daily traffic
30
2006 count
Owner
County
County Highway Agency

About this bridge

4300 St. 21.5-A.8 over Middle Creek is a concrete continuous slab carrying 4300 St. 21.5-A.8 over Middle Creek in Allen County, Kansas. It was built in 2004, so it is 21 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, projected to reach 35 by 2044. The structure is 101 ft (30.8 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Carries4300 St. 21.5-A.8
CrossesMiddle Creek
Location0.2N 1.5E of Mildred
RouteCounty Highway 0
StateKansas
Coordinates38.02742, -95.14207
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.9 US tons
Inventory rating40.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length101 ft (30.8 m)
Longest span39 ft (12 m)
Deck width28 ft (8.5 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2006)
Projected traffic35 by 2044
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 statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 4300 St. 21.5-A.8 over Middle Creek built?

It was built in 2004, making it 21 years old in 2025.

What condition is 4300 St. 21.5-A.8 over Middle Creek 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 June 2024.

How much traffic does 4300 St. 21.5-A.8 over Middle Creek carry?

About 30 vehicles per day (2006 count).

How long is 4300 St. 21.5-A.8 over Middle Creek?

The structure is 101 ft (30.8 m) long with a longest span of 39 ft (12 m) and a deck 28 ft wide.

Who owns 4300 St. 21.5-A.8 over Middle Creek?

It is owned by the County Highway Agency.