US Bridges

Wyo 34 over South Sybille Creek

Fair

Platte County, Wyoming · Bosler JCT - JCT I-25 · Structure no. DZQ

Built
1982
43 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
88 ft
3 main spans
Daily traffic
1,304
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 34 over South Sybille Creek is a steel continuous stringer/multi-beam or girder carrying Wyo 34 over South Sybille Creek in Platte County, Wyoming. It was built in 1982, so it is 43 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 1,304 vehicles a day, roughly 3% of them trucks, projected to reach 1,826 by 2043. The structure is 88 ft (26.8 m) long and 39 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWyo 34
CrossesSouth Sybille Creek
LocationBosler JCT - JCT I-25
RouteState Highway 34
StateWyoming
Coordinates41.82767, -105.2365
Functional classRural Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length88 ft (26.8 m)
Longest span34 ft (10.4 m)
Deck width39 ft (11.8 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,304 (2024)
Projected traffic1,826 by 2043
Trucks3%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 34 over South Sybille Creek built?

It was built in 1982, making it 43 years old in 2025.

What condition is Wyo 34 over South Sybille 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 April 2023.

How much traffic does Wyo 34 over South Sybille Creek carry?

About 1,304 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is Wyo 34 over South Sybille Creek?

The structure is 88 ft (26.8 m) long with a longest span of 34 ft (10.4 m) and a deck 39 ft wide.

Who owns Wyo 34 over South Sybille Creek?

It is owned by the State Highway Agency.