US Bridges

Wyo 59 over Olmstead Draw

FairPosted for load

Campbell County, Wyoming · Gillette - Mont Line · Structure no. CHL

Built
1954
71 years old
Condition
Fair
inspected July 2024
Type
Slab
Concrete Continuous
Length
158 ft
6 main spans
Daily traffic
544
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 59 over Olmstead Draw is a concrete continuous slab carrying Wyo 59 over Olmstead Draw in Campbell County, Wyoming. It was built in 1954, so it is 71 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 6 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 544 vehicles a day, roughly 34% of them trucks, projected to reach 762 by 2043. The structure is 158 ft (48.3 m) long and 31 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWyo 59
CrossesOlmstead Draw
LocationGillette - Mont Line
RouteState Highway 59
StateWyoming
Coordinates44.91903, -105.37005
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.2 US tons
Inventory rating28.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20 + Mod
Structure length158 ft (48.3 m)
Longest span28 ft (8.4 m)
Deck width31 ft (9.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic544 (2024)
Projected traffic762 by 2043
Trucks34%
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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$110,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Wyo 59 over Olmstead Draw built?

It was built in 1954, making it 71 years old in 2025.

What condition is Wyo 59 over Olmstead Draw 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 July 2024.

How much traffic does Wyo 59 over Olmstead Draw carry?

About 544 vehicles per day (2024 count), of which roughly 34% are trucks.

How long is Wyo 59 over Olmstead Draw?

The structure is 158 ft (48.3 m) long with a longest span of 28 ft (8.4 m) and a deck 31 ft wide.

Who owns Wyo 59 over Olmstead Draw?

It is owned by the State Highway Agency.