US Bridges

LN Cnty RD 318 over Green River

Fair

Lincoln County, Wyoming · 6 MI South of Labarge · Structure no. ETC

Built
1978
47 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
242 ft
2 main spans
Daily traffic
28
2024 count
Owner
County
County Highway Agency

About this bridge

LN Cnty RD 318 over Green River is a steel stringer/multi-beam or girder carrying LN Cnty RD 318 over Green River in Lincoln County, Wyoming. It was built in 1978, so it is 47 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 28 vehicles a day, roughly 18% of them trucks, projected to reach 39 by 2043. The structure is 242 ft (73.8 m) long and 14 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesLN Cnty RD 318
CrossesGreen River
Location6 MI South of Labarge
RouteCounty Highway 318
CountyLincoln County
StateWyoming
Coordinates42.19294, -110.16257
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating57.5 US tons
Inventory rating33.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans2
Design loadHS 20
Structure length242 ft (73.8 m)
Longest span119 ft (36.3 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28 (2024)
Projected traffic39 by 2043
Trucks18%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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$12,000
NavigationNo navigation control on waterway

Frequently asked questions

When was LN Cnty RD 318 over Green River built?

It was built in 1978, making it 47 years old in 2025.

What condition is LN Cnty RD 318 over Green 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 July 2024.

How much traffic does LN Cnty RD 318 over Green River carry?

About 28 vehicles per day (2024 count), of which roughly 18% are trucks.

How long is LN Cnty RD 318 over Green River?

The structure is 242 ft (73.8 m) long with a longest span of 119 ft (36.3 m) and a deck 14 ft wide.

Who owns LN Cnty RD 318 over Green River?

It is owned by the County Highway Agency.