US Bridges

Wyo 74 over North Platte River

Poor

Carbon County, Wyoming · Saratoga - East · Structure no. CMW

Built
1963
62 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
269 ft
5 main spans
Daily traffic
4,391
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 74 over North Platte River is a steel continuous stringer/multi-beam or girder carrying Wyo 74 over North Platte River in Carbon County, Wyoming. It was built in 1963, so it is 62 years old, older than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,391 vehicles a day, roughly 7% of them trucks, projected to reach 6,147 by 2043. The structure is 269 ft (82.1 m) long and 40 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWyo 74
CrossesNorth Platte River
LocationSaratoga - East
RouteState Highway 74
StateWyoming
Coordinates41.45488, -106.80539
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating69 US tons
Inventory rating41 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length269 ft (82.1 m)
Longest span57 ft (17.4 m)
Deck width40 ft (12.1 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,391 (2024)
Projected traffic6,147 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$21,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 74 over North Platte River built?

It was built in 1963, making it 62 years old in 2025.

What condition is Wyo 74 over North Platte River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in June 2024.

How much traffic does Wyo 74 over North Platte River carry?

About 4,391 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Wyo 74 over North Platte River?

The structure is 269 ft (82.1 m) long with a longest span of 57 ft (17.4 m) and a deck 40 ft wide.

Who owns Wyo 74 over North Platte River?

It is owned by the State Highway Agency.