US Bridges

3800 RD Mile 7 over Onion Creek Trib.

Fair

Montgomery County, Kansas · 1.7N 2.0W of Bolton · Structure no. 000630981906880

Built
1991
34 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
28 ft
1 main span
Daily traffic
50
2010 count
Owner
County
County Highway Agency

About this bridge

3800 RD Mile 7 over Onion Creek Trib. is a steel stringer/multi-beam or girder carrying 3800 RD Mile 7 over Onion Creek Trib. in Montgomery County, Kansas. It was built in 1991, so it is 34 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 72 by 2039. The structure is 28 ft (8.5 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries3800 RD Mile 7
CrossesOnion Creek Trib.
Location1.7N 2.0W of Bolton
RouteCounty Highway 0
CountyMontgomery County
StateKansas
Coordinates37.18261, -95.83934
Functional classRural Local

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; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating53.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length28 ft (8.5 m)
Longest span27 ft (8.1 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic50 (2010)
Projected traffic72 by 2039
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 3800 RD Mile 7 over Onion Creek Trib. built?

It was built in 1991, making it 34 years old in 2025.

What condition is 3800 RD Mile 7 over Onion Creek Trib. 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 3800 RD Mile 7 over Onion Creek Trib. carry?

About 50 vehicles per day (2010 count).

How long is 3800 RD Mile 7 over Onion Creek Trib.?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.1 m) and a deck 24 ft wide.

Who owns 3800 RD Mile 7 over Onion Creek Trib.?

It is owned by the County Highway Agency.