US Bridges

Wyo 59 over North Platte River

Good

Converse County, Wyoming · Douglas Bypass · Structure no. FDB

Built
1988
37 years old
Condition
Good
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
480 ft
5 main spans
Daily traffic
6,320
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 59 over North Platte River is a steel continuous stringer/multi-beam or girder carrying Wyo 59 over North Platte River in Converse County, Wyoming. It was built in 1988, so it is 37 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,320 vehicles a day, roughly 32% of them trucks, projected to reach 8,848 by 2043. The structure is 480 ft (146.3 m) long and 47 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesWyo 59
CrossesNorth Platte River
LocationDouglas Bypass
RouteState Highway 59
StateWyoming
Coordinates42.77156, -105.40636
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.1 US tons
Inventory rating46 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 25 or greater
Structure length480 ft (146.3 m)
Longest span102 ft (31.1 m)
Deck width47 ft (14.3 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,320 (2024)
Projected traffic8,848 by 2043
Trucks32%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 59 over North Platte River built?

It was built in 1988, making it 37 years old in 2025.

What condition is Wyo 59 over North Platte River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Wyo 59 over North Platte River carry?

About 6,320 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is Wyo 59 over North Platte River?

The structure is 480 ft (146.3 m) long with a longest span of 102 ft (31.1 m) and a deck 47 ft wide.

Who owns Wyo 59 over North Platte River?

It is owned by the State Highway Agency.