US Bridges

Na Cnty RD 402 over Corral Creek

FairPosted for load

Natrona County, Wyoming · 16 Miles S. of Casper · Structure no. DUH

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
24
2024 count
Owner
County
County Highway Agency

About this bridge

Na Cnty RD 402 over Corral Creek is a steel stringer/multi-beam or girder carrying Na Cnty RD 402 over Corral Creek in Natrona County, Wyoming. It was built in 1970, so it is 55 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 24 vehicles a day, roughly 8% of them trucks, projected to reach 34 by 2043. The structure is 36 ft (11 m) long and 16 ft wide. If it were closed, the detour would be 34.8 mi (56 km).

Location

Open in Google Maps
CarriesNa Cnty RD 402
CrossesCorral Creek
Location16 Miles S. of Casper
RouteCounty Highway 402
CountyNatrona County
StateWyoming
Coordinates42.61252, -106.35548
Functional classRural Local

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.2 US tons
Inventory rating33.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width16 ft (4.9 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24 (2024)
Projected traffic34 by 2043
Trucks8%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed34.8 mi (56 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$40,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Na Cnty RD 402 over Corral Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is Na Cnty RD 402 over Corral 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 August 2023.

How much traffic does Na Cnty RD 402 over Corral Creek carry?

About 24 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Na Cnty RD 402 over Corral Creek?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 16 ft wide.

Who owns Na Cnty RD 402 over Corral Creek?

It is owned by the County Highway Agency.