US Bridges

Al Cnty RD 51 over Laramie River

Fair

Albany County, Wyoming · 7 Miles N. of Laramie · Structure no. IXN

Built
1992
33 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
125 ft
3 main spans
Daily traffic
156
2024 count
Owner
County
County Highway Agency

About this bridge

Al Cnty RD 51 over Laramie River is a steel continuous stringer/multi-beam or girder carrying Al Cnty RD 51 over Laramie River in Albany County, Wyoming. It was built in 1992, so it is 33 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 156 vehicles a day, roughly 12% of them trucks, projected to reach 218 by 2043. The structure is 125 ft (38.1 m) long and 29 ft wide.

Location

Open in Google Maps
CarriesAl Cnty RD 51
CrossesLaramie River
Location7 Miles N. of Laramie
RouteCounty Highway 51
CountyAlbany County
StateWyoming
Coordinates41.41263, -105.61887
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length125 ft (38.1 m)
Longest span48 ft (14.6 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic156 (2024)
Projected traffic218 by 2043
Trucks12%
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$7,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Al Cnty RD 51 over Laramie River built?

It was built in 1992, making it 33 years old in 2025.

What condition is Al Cnty RD 51 over Laramie River 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 November 2023.

How much traffic does Al Cnty RD 51 over Laramie River carry?

About 156 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Al Cnty RD 51 over Laramie River?

The structure is 125 ft (38.1 m) long with a longest span of 48 ft (14.6 m) and a deck 29 ft wide.

Who owns Al Cnty RD 51 over Laramie River?

It is owned by the County Highway Agency.