US Bridges

RD Dd over Big Timber Creek

PoorPosted for load

Ness County, Kansas · 0.2N K-4 6.0W Co. Line · Structure no. 000680565004868

Built
1940
85 years old
Condition
Poor
inspected November 2023
Type
Slab
Concrete Continuous
Length
45 ft
4 main spans
Daily traffic
30
2018 count
Owner
County
County Highway Agency

About this bridge

RD Dd over Big Timber Creek is a concrete continuous slab carrying RD Dd over Big Timber Creek in Ness 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 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 30 vehicles a day, roughly 5% of them trucks, projected to reach 40 by 2041. The structure is 45 ft (13.7 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRD Dd
CrossesBig Timber Creek
Location0.2N K-4 6.0W Co. Line
RouteCounty Highway 6815
StateKansas
Coordinates38.64306, -99.69742
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25 US tons
Inventory rating25 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span10 ft (3 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic30 (2018)
Projected traffic40 by 2041
Trucks5%
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$490,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was RD Dd over Big Timber Creek built?

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

What condition is RD Dd over Big Timber 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 November 2023.

How much traffic does RD Dd over Big Timber Creek carry?

About 30 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is RD Dd over Big Timber Creek?

The structure is 45 ft (13.7 m) long with a longest span of 10 ft (3 m) and a deck 24 ft wide.

Who owns RD Dd over Big Timber Creek?

It is owned by the County Highway Agency.