US Bridges

CR 320 over Trib. to Dry Walnut Ck.

PoorPosted for load

Rush County, Kansas · 7.8S of Timken · Structure no. 000000000830270

Built
1939
86 years old
Condition
Poor
inspected December 2023
Type
Culvert
Masonry
Length
21 ft
1 main span
Daily traffic
110
2008 count
Owner
County
County Highway Agency

About this bridge

CR 320 over Trib. to Dry Walnut Ck. is a masonry culvert carrying CR 320 over Trib. to Dry Walnut Ck. in Rush County, Kansas. It was built in 1939, so it is 86 years old, older than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 110 vehicles a day, roughly 10% of them trucks, projected to reach 140 by 2044. The structure is 21 ft (6.4 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCR 320
CrossesTrib. to Dry Walnut Ck.
Location7.8S of Timken
RouteCounty Highway 584
CountyRush County
StateKansas
Coordinates38.35833, -99.17917
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating19.6 US tons
Inventory rating19.6 US tons

Structure

Structure typeCulvert
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic110 (2008)
Projected traffic140 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$45,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 320 over Trib. to Dry Walnut Ck. built?

It was built in 1939, making it 86 years old in 2025.

What condition is CR 320 over Trib. to Dry Walnut Ck. in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does CR 320 over Trib. to Dry Walnut Ck. carry?

About 110 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is CR 320 over Trib. to Dry Walnut Ck.?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns CR 320 over Trib. to Dry Walnut Ck.?

It is owned by the County Highway Agency.