US Bridges

SB Cnty RD 123 over New Fork River

Poor

Sublette County, Wyoming · 2 Iles South of Pinedale · Structure no. KIK

Built
1995
30 years old
Condition
Poor
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
61 ft
1 main span
Daily traffic
869
2024 count
Owner
County
County Highway Agency

About this bridge

SB Cnty RD 123 over New Fork River is a steel stringer/multi-beam or girder carrying SB Cnty RD 123 over New Fork River in Sublette County, Wyoming. It was built in 1995, so it is 30 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 869 vehicles a day, roughly 8% of them trucks, projected to reach 1,217 by 2043. The structure is 61 ft (18.6 m) long and 24 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesSB Cnty RD 123
CrossesNew Fork River
Location2 Iles South of Pinedale
RouteCounty Highway 123
StateWyoming
Coordinates42.83755, -109.86374
Functional classRural Minor Collector

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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating77.4 US tons
Inventory rating46.6 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length61 ft (18.6 m)
Longest span61 ft (18.6 m)
Deck width24 ft (7.4 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic869 (2024)
Projected traffic1,217 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$14,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SB Cnty RD 123 over New Fork River built?

It was built in 1995, making it 30 years old in 2025.

What condition is SB Cnty RD 123 over New Fork 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 July 2023.

How much traffic does SB Cnty RD 123 over New Fork River carry?

About 869 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is SB Cnty RD 123 over New Fork River?

The structure is 61 ft (18.6 m) long with a longest span of 61 ft (18.6 m) and a deck 24 ft wide.

Who owns SB Cnty RD 123 over New Fork River?

It is owned by the County Highway Agency.