US Bridges

Pa Cnty RD 6NX over Rattlesnake Creek

FairPosted for load

Park County, Wyoming · 10 MI W of Cody · Structure no. MND

Built
1930
95 years old
Condition
Fair
inspected February 2025
Type
Tee Beam
Concrete
Length
34 ft
1 main span
Daily traffic
65
2024 count
Owner
County
County Highway Agency

About this bridge

Pa Cnty RD 6NX over Rattlesnake Creek is a concrete tee beam carrying Pa Cnty RD 6NX over Rattlesnake Creek in Park County, Wyoming. It was built in 1930, so it is 95 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 65 vehicles a day, roughly 8% of them trucks, projected to reach 91 by 2043. The structure is 34 ft (10.4 m) long and 20 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesPa Cnty RD 6NX
CrossesRattlesnake Creek
Location10 MI W of Cody
RouteCounty Highway 6NX
StateWyoming
Coordinates44.50693, -109.2678
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating27.4 US tons
Inventory rating16.4 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2024)
Projected traffic91 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$315,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa Cnty RD 6NX over Rattlesnake Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Pa Cnty RD 6NX over Rattlesnake 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 Pa Cnty RD 6NX over Rattlesnake Creek carry?

About 65 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Pa Cnty RD 6NX over Rattlesnake Creek?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m) and a deck 20 ft wide.

Who owns Pa Cnty RD 6NX over Rattlesnake Creek?

It is owned by the County Highway Agency.