US Bridges

4150 RD Mile 12 over Coal Creek

Fair

Montgomery County, Kansas · 5.0W of Liberty · Structure no. 000630999506906

Built
1976
49 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
50
2010 count
Owner
County
County Highway Agency

About this bridge

4150 RD Mile 12 over Coal Creek is a prestressed concrete tee beam carrying 4150 RD Mile 12 over Coal Creek in Montgomery County, Kansas. It was built in 1976, so it is 49 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 2039. The structure is 70 ft (21.3 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
Carries4150 RD Mile 12
CrossesCoal Creek
Location5.0W of Liberty
RouteCounty Highway 6325
CountyMontgomery County
StateKansas
Coordinates37.15778, -95.68323
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
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 alignment8: Equal to present desirable criteria
Operating rating44.2 US tons
Inventory rating24.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length70 ft (21.3 m)
Longest span69 ft (21 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2010)
Projected traffic60 by 2039
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 4150 RD Mile 12 over Coal Creek built?

It was built in 1976, making it 49 years old in 2025.

What condition is 4150 RD Mile 12 over Coal 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 4150 RD Mile 12 over Coal Creek carry?

About 50 vehicles per day (2010 count).

How long is 4150 RD Mile 12 over Coal Creek?

The structure is 70 ft (21.3 m) long with a longest span of 69 ft (21 m) and a deck 25 ft wide.

Who owns 4150 RD Mile 12 over Coal Creek?

It is owned by the County Highway Agency.