US Bridges

Wyo 336 over Negro Draw

Fair

Sheridan County, Wyoming · Sheridan-Ulm · Structure no. ILJ

Built
1995
30 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
31 ft
2 main spans
Daily traffic
192
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 336 over Negro Draw is a steel culvert carrying Wyo 336 over Negro Draw in Sheridan County, Wyoming. It was built in 1995, so it is 30 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 192 vehicles a day, roughly 5% of them trucks, projected to reach 269 by 2043. The structure is 31 ft (9.4 m) long. If it were closed, the detour would be 98.8 mi (159 km).

CarriesWyo 336
CrossesNegro Draw
LocationSheridan-Ulm
RouteState Highway 336
StateWyoming
Coordinates44.82163, -106.78696
Functional classRural Major 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.9 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span13 ft (4.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic192 (2024)
Projected traffic269 by 2043
Trucks5%
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 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 336 over Negro Draw built?

It was built in 1995, making it 30 years old in 2025.

What condition is Wyo 336 over Negro 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 August 2023.

How much traffic does Wyo 336 over Negro Draw carry?

About 192 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Wyo 336 over Negro Draw?

The structure is 31 ft (9.4 m) long with a longest span of 13 ft (4.1 m).

Who owns Wyo 336 over Negro Draw?

It is owned by the State Highway Agency.