US Bridges

3900 RD Mile 12 over Coal Creek

Fair

Montgomery County, Kansas · 3.3S of Independence · Structure no. 000000000630350

Built
1980
45 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
93 ft
3 main spans
Daily traffic
4,135
2010 count
Owner
County
County Highway Agency

About this bridge

3900 RD Mile 12 over Coal Creek is a concrete continuous slab carrying 3900 RD Mile 12 over Coal Creek in Montgomery 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 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 4,135 vehicles a day, roughly 4% of them trucks, projected to reach 4,962 by 2039. The structure is 93 ft (28.3 m) long and 46 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries3900 RD Mile 12
CrossesCoal Creek
Location3.3S of Independence
RouteCounty Highway 475
CountyMontgomery County
StateKansas
Coordinates37.1621, -95.71119
Functional classRural Major 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating38.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span36 ft (11 m)
Deck width46 ft (14 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic4,135 (2010)
Projected traffic4,962 by 2039
Trucks4%
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 3900 RD Mile 12 over Coal Creek built?

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

What condition is 3900 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 3900 RD Mile 12 over Coal Creek carry?

About 4,135 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is 3900 RD Mile 12 over Coal Creek?

The structure is 93 ft (28.3 m) long with a longest span of 36 ft (11 m) and a deck 46 ft wide.

Who owns 3900 RD Mile 12 over Coal Creek?

It is owned by the County Highway Agency.