US Bridges

Local T-433-1 over Duncan Creek

PoorPosted for load

Doniphan County, Kansas · N. End of Blair · Structure no. 000221069103300

Built
1923
102 years old
Condition
Poor
inspected March 2024
Type
Tee Beam
Concrete
Length
33 ft
1 main span
Daily traffic
35
2005 count
Owner
County
County Highway Agency

About this bridge

Local T-433-1 over Duncan Creek is a concrete tee beam carrying Local T-433-1 over Duncan Creek in Doniphan County, Kansas. It was built in 1923, so it is 102 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 3 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 35 vehicles a day, projected to reach 40 by 2043. The structure is 33 ft (10.1 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesLocal T-433-1
CrossesDuncan Creek
LocationN. End of Blair
RouteCounty Highway 0
StateKansas
Coordinates39.78375, -95.00222
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionMarch 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
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 alignment6: Equal to present minimum criteria
Operating rating29.7 US tons
Inventory rating17.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length33 ft (10.1 m)
Longest span31 ft (9.6 m)
Deck width23 ft (6.9 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic35 (2005)
Projected traffic40 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$335,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Local T-433-1 over Duncan Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is Local T-433-1 over Duncan 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 March 2024.

How much traffic does Local T-433-1 over Duncan Creek carry?

About 35 vehicles per day (2005 count).

How long is Local T-433-1 over Duncan Creek?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.6 m) and a deck 23 ft wide.

Who owns Local T-433-1 over Duncan Creek?

It is owned by the County Highway Agency.