US Bridges

CO Cnty RD 30 over Laprele Creek

FairPosted for load

Converse County, Wyoming · 8 Miles NW of Douglas · Structure no. KIZ

Built
1997
28 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
35 ft
1 main span
Daily traffic
39
2024 count
Owner
County
County Highway Agency

About this bridge

CO Cnty RD 30 over Laprele Creek is a steel stringer/multi-beam or girder carrying CO Cnty RD 30 over Laprele Creek in Converse County, Wyoming. It was built in 1997, so it is 28 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 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 39 vehicles a day, roughly 18% of them trucks, projected to reach 55 by 2043. The structure is 35 ft (10.7 m) long and 22 ft wide.

Location

Open in Google Maps
CarriesCO Cnty RD 30
CrossesLaprele Creek
Location8 Miles NW of Douglas
RouteCounty Highway 30
CountyConverse County
StateWyoming
Coordinates42.79881, -105.52315
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating93 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length35 ft (10.7 m)
Longest span22 ft (6.7 m)
Deck width22 ft (6.6 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic39 (2024)
Projected traffic55 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$38,000
NavigationNo navigation control on waterway

Frequently asked questions

When was CO Cnty RD 30 over Laprele Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is CO Cnty RD 30 over Laprele 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 September 2023.

How much traffic does CO Cnty RD 30 over Laprele Creek carry?

About 39 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is CO Cnty RD 30 over Laprele Creek?

The structure is 35 ft (10.7 m) long with a longest span of 22 ft (6.7 m) and a deck 22 ft wide.

Who owns CO Cnty RD 30 over Laprele Creek?

It is owned by the County Highway Agency.