US Bridges

Wyo 30 over Mckenney Creek

FairPosted for load

Big Horn County, Wyoming · Basin - JCT US 14/16/20 · Structure no. CJD

Built
1960
65 years old
Condition
Fair
inspected February 2025
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
945
2024 count
Owner
State
State Highway Agency

About this bridge

Wyo 30 over Mckenney Creek is a concrete culvert carrying Wyo 30 over Mckenney Creek in Big Horn County, Wyoming. It was built in 1960, so it is 65 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 5 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 945 vehicles a day, roughly 9% of them trucks, projected to reach 1,323 by 2043. The structure is 20 ft (6.1 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesWyo 30
CrossesMckenney Creek
LocationBasin - JCT US 14/16/20
RouteState Highway 30
CountyBig Horn County
StateWyoming
Coordinates44.40391, -108.2175
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.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2025
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.2 US tons
Inventory rating20.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic945 (2024)
Projected traffic1,323 by 2043
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 30 over Mckenney Creek built?

It was built in 1960, making it 65 years old in 2025.

What condition is Wyo 30 over Mckenney 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 February 2025.

How much traffic does Wyo 30 over Mckenney Creek carry?

About 945 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is Wyo 30 over Mckenney Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 33 ft wide.

Who owns Wyo 30 over Mckenney Creek?

It is owned by the State Highway Agency.