US Bridges

3875 RD Mile 12 over Rock Creek

Fair

Montgomery County, Kansas · 1.3S 2.4W Independence · Structure no. 000000000630440

Built
1994
31 years old
Condition
Fair
inspected March 2023
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
1,004
2010 count
Owner
County
County Highway Agency

About this bridge

3875 RD Mile 12 over Rock Creek is a concrete continuous slab carrying 3875 RD Mile 12 over Rock Creek in Montgomery County, Kansas. It was built in 1994, so it is 31 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 1,004 vehicles a day, roughly 4% of them trucks, projected to reach 1,205 by 2039. The structure is 113 ft (34.5 m) long and 32 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
Carries3875 RD Mile 12
CrossesRock Creek
Location1.3S 2.4W Independence
RouteCounty Highway 812
CountyMontgomery County
StateKansas
Coordinates37.19307, -95.75927
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; action required to protect exposed foundations
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.5 m)
Longest span44 ft (13.4 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic1,004 (2010)
Projected traffic1,205 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 3875 RD Mile 12 over Rock Creek built?

It was built in 1994, making it 31 years old in 2025.

What condition is 3875 RD Mile 12 over Rock 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 3875 RD Mile 12 over Rock Creek carry?

About 1,004 vehicles per day (2010 count), of which roughly 4% are trucks.

How long is 3875 RD Mile 12 over Rock Creek?

The structure is 113 ft (34.5 m) long with a longest span of 44 ft (13.4 m) and a deck 32 ft wide.

Who owns 3875 RD Mile 12 over Rock Creek?

It is owned by the County Highway Agency.