US Bridges

320 Rd. over Trib. N. Cottonwood Riv.

FairPosted for load

Marion County, Kansas · 3.4N 0.6W of Durham · Structure no. 000570831005020

Built
1920
105 years old
Condition
Fair
inspected November 2024
Type
Culvert
Concrete
Length
27 ft
3 main spans
Daily traffic
35
2002 count
Owner
County
County Highway Agency

About this bridge

320 Rd. over Trib. N. Cottonwood Riv. is a concrete culvert carrying 320 Rd. over Trib. N. Cottonwood Riv. in Marion County, Kansas. It was built in 1920, so it is 105 years old, older 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 35 vehicles a day, projected to reach 42 by 2044. The structure is 27 ft (8.2 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries320 Rd.
CrossesTrib. N. Cottonwood Riv.
Location3.4N 0.6W of Durham
RouteCounty Highway 0
CountyMarion County
StateKansas
Coordinates38.53678, -97.24331
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadUnknown
Structure length27 ft (8.2 m)
Longest span8 ft (2.4 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic35 (2002)
Projected traffic42 by 2044
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 320 Rd. over Trib. N. Cottonwood Riv. built?

It was built in 1920, making it 105 years old in 2025.

What condition is 320 Rd. over Trib. N. Cottonwood Riv. 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 November 2024.

How much traffic does 320 Rd. over Trib. N. Cottonwood Riv. carry?

About 35 vehicles per day (2002 count).

How long is 320 Rd. over Trib. N. Cottonwood Riv.?

The structure is 27 ft (8.2 m) long with a longest span of 8 ft (2.4 m) and a deck 26 ft wide.

Who owns 320 Rd. over Trib. N. Cottonwood Riv.?

It is owned by the County Highway Agency.