US Bridges

A-21.4 Rs 307 over Unnamed

GoodPosted for load

Harvey County, Kansas · 4.4E Sedgwick · Structure no. 000000000400700

Built
1965
60 years old
Condition
Good
inspected April 2024
Type
Slab
Concrete Continuous
Length
123 ft
3 main spans
Daily traffic
650
2006 count
Owner
County
County Highway Agency

About this bridge

A-21.4 Rs 307 over Unnamed is a concrete continuous slab carrying A-21.4 Rs 307 over Unnamed in Harvey County, Kansas. It was built in 1965, so it is 60 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 650 vehicles a day, projected to reach 2,400 by 2042. The structure is 123 ft (37.5 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesA-21.4 Rs 307
CrossesUnnamed
Location4.4E Sedgwick
RouteCounty Highway 307
StateKansas
Coordinates37.91222, -97.32833
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.8 US tons
Inventory rating18.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length123 ft (37.5 m)
Longest span48 ft (14.5 m)
Deck width36 ft (11 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic650 (2006)
Projected traffic2,400 by 2042
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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was A-21.4 Rs 307 over Unnamed built?

It was built in 1965, making it 60 years old in 2025.

What condition is A-21.4 Rs 307 over Unnamed 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 April 2024.

How much traffic does A-21.4 Rs 307 over Unnamed carry?

About 650 vehicles per day (2006 count).

How long is A-21.4 Rs 307 over Unnamed?

The structure is 123 ft (37.5 m) long with a longest span of 48 ft (14.5 m) and a deck 36 ft wide.

Who owns A-21.4 Rs 307 over Unnamed?

It is owned by the County Highway Agency.