US Bridges

SW 20 Ave over Copper Creek

PoorPosted for load

Harper County, Kansas · 4.0S 2.0W of Spring · Structure no. 000390739007128

Built
1960
65 years old
Condition
Poor
inspected February 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
40 ft
2 main spans
Daily traffic
10
2021 count
Owner
County
County Highway Agency

About this bridge

SW 20 Ave over Copper Creek is a wood or timber stringer/multi-beam or girder carrying SW 20 Ave over Copper Creek in Harper County, Kansas. It was built in 1960, so it is 65 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 10 vehicles a day, roughly 10% of them trucks, projected to reach 10 by 2043. The structure is 40 ft (12.1 m) long and 20 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesSW 20 Ave
CrossesCopper Creek
Location4.0S 2.0W of Spring
RouteCounty Highway 0
StateKansas
Coordinates36.9999, -98.07356
Functional classRural Local

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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.2 US tons
Inventory rating13.6 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length40 ft (12.1 m)
Longest span19 ft (5.7 m)
Deck width20 ft (6.1 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic10 (2021)
Projected traffic10 by 2043
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$390,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SW 20 Ave over Copper Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is SW 20 Ave over Copper Creek 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 February 2023.

How much traffic does SW 20 Ave over Copper Creek carry?

About 10 vehicles per day (2021 count), of which roughly 10% are trucks.

How long is SW 20 Ave over Copper Creek?

The structure is 40 ft (12.1 m) long with a longest span of 19 ft (5.7 m) and a deck 20 ft wide.

Who owns SW 20 Ave over Copper Creek?

It is owned by the County Highway Agency.