US Bridges

County RD 1100 over Unnamed Stream

Fair

Montgomery County, Kansas · Copan Reservoir & W. A. · Structure no. R5-COPR-01

Built
1945
80 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Concrete
Length
34 ft
1 main span
Daily traffic
5
2019 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

County RD 1100 over Unnamed Stream is a concrete stringer/multi-beam or girder carrying County RD 1100 over Unnamed Stream in Montgomery County, Kansas. It was built in 1945, so it is 80 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.

It carries about 5 vehicles a day, projected to reach 10 by 2045. The structure is 34 ft (10.4 m) long and 22 ft wide. If it were closed, the detour would be 198.8 mi (320 km).

Location

Open in Google Maps
CarriesCounty RD 1100
CrossesUnnamed Stream
LocationCopan Reservoir & W. A.
RouteState Lands Road 0
CountyMontgomery County
StateKansas
Coordinates37.01247, -95.96455
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width22 ft (6.6 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic5 (2019)
Projected traffic10 by 2045
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed198.8 mi (320 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$100,000
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 1100 over Unnamed Stream built?

It was built in 1945, making it 80 years old in 2025.

What condition is County RD 1100 over Unnamed Stream 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 January 2025.

How much traffic does County RD 1100 over Unnamed Stream carry?

About 5 vehicles per day (2019 count).

How long is County RD 1100 over Unnamed Stream?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 22 ft wide.

Who owns County RD 1100 over Unnamed Stream?

It is owned by the State Park, Forest, or Reservation Agency.