US Bridges

Pl Cnty RD 47 over North Laramie River

Poor

Platte County, Wyoming · 5 Mi. N. of Wheatland · Structure no. FNW

Built
1990
35 years old
Condition
Poor
inspected November 2023
Type
Girder and Floorbeam System
Steel
Length
83 ft
1 main span
Daily traffic
10
2024 count
Owner
County
County Highway Agency

About this bridge

Pl Cnty RD 47 over North Laramie River is a steel girder and floorbeam system carrying Pl Cnty RD 47 over North Laramie River in Platte County, Wyoming. It was built in 1990, so it is 35 years old, younger than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 10 vehicles a day, roughly 10% of them trucks, projected to reach 14 by 2043. The structure is 83 ft (25.3 m) long and 21 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesPl Cnty RD 47
CrossesNorth Laramie River
Location5 Mi. N. of Wheatland
RouteCounty Highway 47
CountyPlatte County
StateWyoming
Coordinates42.12944, -104.92671
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.6 US tons
Inventory rating34.7 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length83 ft (25.3 m)
Longest span80 ft (24.4 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2024)
Projected traffic14 by 2043
Trucks10%
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

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$63,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pl Cnty RD 47 over North Laramie River built?

It was built in 1990, making it 35 years old in 2025.

What condition is Pl Cnty RD 47 over North Laramie River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2023.

How much traffic does Pl Cnty RD 47 over North Laramie River carry?

About 10 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Pl Cnty RD 47 over North Laramie River?

The structure is 83 ft (25.3 m) long with a longest span of 80 ft (24.4 m) and a deck 21 ft wide.

Who owns Pl Cnty RD 47 over North Laramie River?

It is owned by the County Highway Agency.