US Bridges

Jo Cnty RD 51 over Murphy Creek

Fair

Johnson County, Wyoming · 13 Miles S. of Kaycee · Structure no. EUR

Built
1983
42 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
110 ft
3 main spans
Daily traffic
53
2024 count
Owner
County
County Highway Agency

About this bridge

Jo Cnty RD 51 over Murphy Creek is a steel continuous stringer/multi-beam or girder carrying Jo Cnty RD 51 over Murphy Creek in Johnson County, Wyoming. It was built in 1983, so it is 42 years old, younger 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 53 vehicles a day, roughly 11% of them trucks, projected to reach 74 by 2043. The structure is 110 ft (33.5 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesJo Cnty RD 51
CrossesMurphy Creek
Location13 Miles S. of Kaycee
RouteCounty Highway 51
StateWyoming
Coordinates43.58695, -106.68547
Functional classRural Minor 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.1 US tons
Inventory rating38 US tons

Structure

MaterialSteel Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length110 ft (33.5 m)
Longest span42 ft (12.8 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic53 (2024)
Projected traffic74 by 2043
Trucks11%
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 statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$7,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Jo Cnty RD 51 over Murphy Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Jo Cnty RD 51 over Murphy 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 March 2024.

How much traffic does Jo Cnty RD 51 over Murphy Creek carry?

About 53 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Jo Cnty RD 51 over Murphy Creek?

The structure is 110 ft (33.5 m) long with a longest span of 42 ft (12.8 m) and a deck 29 ft wide.

Who owns Jo Cnty RD 51 over Murphy Creek?

It is owned by the County Highway Agency.