US Bridges

320th St. over Unnamed Stream

Good

Brown County, Kansas · 0.3S 4.8W of Reserve · Structure no. 000070999203040

Built
1995
30 years old
Condition
Good
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
31 ft
1 main span
Daily traffic
40
2016 count
Owner
County
County Highway Agency

About this bridge

320th St. over Unnamed Stream is a steel stringer/multi-beam or girder carrying 320th St. over Unnamed Stream in Brown County, Kansas. It was built in 1995, so it is 30 years old, younger than the Kansas average of 52.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 40 vehicles a day, projected to reach 44 by 2044. The structure is 31 ft (9.3 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
Carries320th St.
CrossesUnnamed Stream
Location0.3S 4.8W of Reserve
RouteCounty Highway 0
CountyBrown County
StateKansas
Coordinates39.97184, -95.65709
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.3 m)
Longest span28 ft (8.6 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic40 (2016)
Projected traffic44 by 2044
Trucks0%
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 320th St. over Unnamed Stream built?

It was built in 1995, making it 30 years old in 2025.

What condition is 320th St. over Unnamed Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2024.

How much traffic does 320th St. over Unnamed Stream carry?

About 40 vehicles per day (2016 count).

How long is 320th St. over Unnamed Stream?

The structure is 31 ft (9.3 m) long with a longest span of 28 ft (8.6 m) and a deck 25 ft wide.

Who owns 320th St. over Unnamed Stream?

It is owned by the County Highway Agency.