US Bridges

Antelope Rd. over Unnamed Stream

PoorPosted for load

Brown County, Kansas · 0.8E 3.7N of Sabetha · Structure no. 000070987103049

Built
1918
107 years old
Condition
Poor
inspected January 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
36 ft
1 main span
Daily traffic
45
2014 count
Owner
County
County Highway Agency

About this bridge

Antelope Rd. over Unnamed Stream is a concrete stringer/multi-beam or girder carrying Antelope Rd. over Unnamed Stream in Brown County, Kansas. It was built in 1918, so it is 107 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 45 vehicles a day, projected to reach 50 by 2044. The structure is 36 ft (11 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesAntelope Rd.
CrossesUnnamed Stream
Location0.8E 3.7N of Sabetha
RouteCounty Highway 0
CountyBrown County
StateKansas
Coordinates39.959, -95.76855
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
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 inspectionJanuary 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
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating18 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length36 ft (11 m)
Longest span34 ft (10.4 m)
Deck width20 ft (6.2 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic45 (2014)
Projected traffic50 by 2044
Trucks0%
Lanes on structure2
Traffic directionOne-lane bridge for two-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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$67,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Antelope Rd. over Unnamed Stream built?

It was built in 1918, making it 107 years old in 2025.

What condition is Antelope Rd. over Unnamed Stream 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 January 2024.

How much traffic does Antelope Rd. over Unnamed Stream carry?

About 45 vehicles per day (2014 count).

How long is Antelope Rd. over Unnamed Stream?

The structure is 36 ft (11 m) long with a longest span of 34 ft (10.4 m) and a deck 20 ft wide.

Who owns Antelope Rd. over Unnamed Stream?

It is owned by the County Highway Agency.