US Bridges

Hs Cnty RD 6 over Kirby Creek

Fair

Hot Springs County, Wyoming · 20 Mi. Ne. of Thermopolis · Structure no. BVQ

Built
1973
52 years old
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
105 ft
3 main spans
Daily traffic
57
2024 count
Owner
County
County Highway Agency

About this bridge

Hs Cnty RD 6 over Kirby Creek is a steel continuous stringer/multi-beam or girder carrying Hs Cnty RD 6 over Kirby Creek in Hot Springs County, Wyoming. It was built in 1973, so it is 52 years old, older than the Wyoming average of 48.4 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 57 vehicles a day, roughly 7% of them trucks, projected to reach 80 by 2043. The structure is 105 ft (32 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesHs Cnty RD 6
CrossesKirby Creek
Location20 Mi. Ne. of Thermopolis
RouteCounty Highway 6
StateWyoming
Coordinates43.70765, -107.90438
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating42 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length105 ft (32 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic57 (2024)
Projected traffic80 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$35,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Hs Cnty RD 6 over Kirby Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Hs Cnty RD 6 over Kirby Creek 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 February 2025.

How much traffic does Hs Cnty RD 6 over Kirby Creek carry?

About 57 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Hs Cnty RD 6 over Kirby Creek?

The structure is 105 ft (32 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns Hs Cnty RD 6 over Kirby Creek?

It is owned by the County Highway Agency.