US Bridges

11-U.7 122 over Mill Creek

Fair

Washington County, Kansas · 2.5N 3.6E of Washington · Structure no. 001010857703200

Built
1985
40 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
185 ft
4 main spans
Daily traffic
50
2014 count
Owner
County
County Highway Agency

About this bridge

11-U.7 122 over Mill Creek is a concrete continuous slab carrying 11-U.7 122 over Mill Creek in Washington County, Kansas. It was built in 1985, so it is 40 years old, younger 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 50 vehicles a day, projected to reach 60 by 2043. The structure is 185 ft (56.4 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries11-U.7 122
CrossesMill Creek
Location2.5N 3.6E of Washington
RouteCounty Highway 10120
CountyWashington County
StateKansas
Coordinates39.85632, -96.98108
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length185 ft (56.4 m)
Longest span52 ft (15.7 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 traffic50 (2014)
Projected traffic60 by 2043
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 11-U.7 122 over Mill Creek built?

It was built in 1985, making it 40 years old in 2025.

What condition is 11-U.7 122 over Mill 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 March 2023.

How much traffic does 11-U.7 122 over Mill Creek carry?

About 50 vehicles per day (2014 count).

How long is 11-U.7 122 over Mill Creek?

The structure is 185 ft (56.4 m) long with a longest span of 52 ft (15.7 m) and a deck 28 ft wide.

Who owns 11-U.7 122 over Mill Creek?

It is owned by the County Highway Agency.