US Bridges

Carlson RDP.4-3.1C over Swede Creek

FairPosted for load

Riley County, Kansas · 4.9E 6.4N of Randolph · Structure no. 000810891403661

Built
1940
85 years old
Condition
Fair
inspected June 2024
Type
Truss - Thru
Steel
Length
63 ft
1 main span
Daily traffic
30
2004 count
Owner
County
County Highway Agency

About this bridge

Carlson RDP.4-3.1C over Swede Creek is a steel truss - thru carrying Carlson RDP.4-3.1C over Swede Creek in Riley County, Kansas. It was built in 1940, so it is 85 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 30 vehicles a day, projected to reach 30 by 2042. The structure is 63 ft (19.2 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCarlson RDP.4-3.1C
CrossesSwede Creek
Location4.9E 6.4N of Randolph
RouteCounty Highway 0
CountyRiley County
StateKansas
Coordinates39.52083, -96.67284
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2024
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 adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating20.8 US tons
Inventory rating12.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length63 ft (19.2 m)
Longest span58 ft (17.6 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2004)
Projected traffic30 by 2042
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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Carlson RDP.4-3.1C over Swede Creek built?

It was built in 1940, making it 85 years old in 2025.

What condition is Carlson RDP.4-3.1C over Swede Creek 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 June 2024.

How much traffic does Carlson RDP.4-3.1C over Swede Creek carry?

About 30 vehicles per day (2004 count).

How long is Carlson RDP.4-3.1C over Swede Creek?

The structure is 63 ft (19.2 m) long with a longest span of 58 ft (17.6 m) and a deck 20 ft wide.

Who owns Carlson RDP.4-3.1C over Swede Creek?

It is owned by the County Highway Agency.