US Bridges

7-L.8 31 over Riddle Creek

FairPosted for load

Washington County, Kansas · 1.3E 4.8N of Morrowville · Structure no. 001010839803120

Built
1930
95 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
22 ft
1 main span
Daily traffic
40
2014 count
Owner
County
County Highway Agency

About this bridge

7-L.8 31 over Riddle Creek is a concrete slab carrying 7-L.8 31 over Riddle Creek in Washington County, Kansas. It was built in 1930, so it is 95 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 6 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 40 vehicles a day, projected to reach 48 by 2043. The structure is 22 ft (6.7 m) long and 22 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
Carries7-L.8 31
CrossesRiddle Creek
Location1.3E 4.8N of Morrowville
RouteCounty Highway 0
CountyWashington County
StateKansas
Coordinates39.9155, -97.14717
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating27 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span21 ft (6.4 m)
Deck width22 ft (6.7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic40 (2014)
Projected traffic48 by 2043
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 7-L.8 31 over Riddle Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is 7-L.8 31 over Riddle 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 April 2023.

How much traffic does 7-L.8 31 over Riddle Creek carry?

About 40 vehicles per day (2014 count).

How long is 7-L.8 31 over Riddle Creek?

The structure is 22 ft (6.7 m) long with a longest span of 21 ft (6.4 m) and a deck 22 ft wide.

Who owns 7-L.8 31 over Riddle Creek?

It is owned by the County Highway Agency.