US Bridges

Service Road over Laramie River

Fair

Goshen County, Wyoming · 2.5 Miles West of Fort LA · Structure no. 1420001S0000000

Built
1969
56 years old
Condition
Fair
inspected October 2023
Type
Tee Beam
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
25
2010 count
Owner
Federal
National Park Service

About this bridge

Service Road over Laramie River is a concrete continuous tee beam carrying Service Road over Laramie River in Goshen County, Wyoming. It was built in 1969, so it is 56 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 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 25 vehicles a day, projected to reach 50 by 2030. The structure is 100 ft (30.5 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesService Road
CrossesLaramie River
Location2.5 Miles West of Fort LA
RouteFederal Lands Road 400
CountyGoshen County
StateWyoming
Coordinates42.20157, -104.56061
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span64 ft (19.5 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2010)
Projected traffic50 by 2030
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$26,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Service Road over Laramie River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Service Road 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 October 2023.

How much traffic does Service Road over Laramie River carry?

About 25 vehicles per day (2010 count).

How long is Service Road over Laramie River?

The structure is 100 ft (30.5 m) long with a longest span of 64 ft (19.5 m) and a deck 25 ft wide.

Who owns Service Road over Laramie River?

It is owned by the National Park Service.