US Bridges

T-7.4 324 over Trib. Mill Creek

Good

Washington County, Kansas · 1.0N 7.0W of Hanover · Structure no. 001010855003124

Built
1980
45 years old
Condition
Good
inspected March 2023
Type
Culvert
Concrete
Length
25 ft
1 main span
Daily traffic
30
2014 count
Owner
County
County Highway Agency

About this bridge

T-7.4 324 over Trib. Mill Creek is a concrete culvert carrying T-7.4 324 over Trib. Mill Creek in Washington County, Kansas. It was built in 1980, so it is 45 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 7 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 36 by 2043. The structure is 25 ft (7.6 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesT-7.4 324
CrossesTrib. Mill Creek
Location1.0N 7.0W of Hanover
RouteCounty Highway 10123
CountyWashington County
StateKansas
Coordinates39.90881, -97.01231
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating107 US tons
Inventory rating64.3 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length25 ft (7.6 m)
Longest span24 ft (7.3 m)
Deck width30 ft (9.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2014)
Projected traffic36 by 2043
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 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 T-7.4 324 over Trib. Mill Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is T-7.4 324 over Trib. Mill 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 March 2023.

How much traffic does T-7.4 324 over Trib. Mill Creek carry?

About 30 vehicles per day (2014 count).

How long is T-7.4 324 over Trib. Mill Creek?

The structure is 25 ft (7.6 m) long with a longest span of 24 ft (7.3 m) and a deck 30 ft wide.

Who owns T-7.4 324 over Trib. Mill Creek?

It is owned by the County Highway Agency.