US Bridges

Local T-731-1 over Mosquito Creek

PoorPosted for load

Doniphan County, Kansas · W. End of Troy · Structure no. 000221057803284

Built
1920
105 years old
Condition
Poor
inspected March 2024
Type
Tee Beam
Concrete
Length
66 ft
3 main spans
Daily traffic
5
2005 count
Owner
County
County Highway Agency

About this bridge

Local T-731-1 over Mosquito Creek is a concrete tee beam carrying Local T-731-1 over Mosquito Creek in Doniphan County, Kansas. It was built in 1920, so it is 105 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 5 vehicles a day, projected to reach 5 by 2043. The structure is 66 ft (20.1 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLocal T-731-1
CrossesMosquito Creek
LocationW. End of Troy
RouteCounty Highway 0
CountyDoniphan County
StateKansas
Coordinates39.79194, -95.1025
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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 protection4 PoorAdvanced section loss, deterioration, 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating22 US tons
Inventory rating16 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadUnknown
Structure length66 ft (20.1 m)
Longest span28 ft (8.5 m)
Deck width23 ft (6.9 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic5 (2005)
Projected traffic5 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$195,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Local T-731-1 over Mosquito Creek built?

It was built in 1920, making it 105 years old in 2025.

What condition is Local T-731-1 over Mosquito 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-731-1 over Mosquito Creek carry?

About 5 vehicles per day (2005 count).

How long is Local T-731-1 over Mosquito Creek?

The structure is 66 ft (20.1 m) long with a longest span of 28 ft (8.5 m) and a deck 23 ft wide.

Who owns Local T-731-1 over Mosquito Creek?

It is owned by the County Highway Agency.