US Bridges

Gravel Road over Dam Spillway

Good

Sweetwater County, Wyoming · Big Sandy Dam N of Farson · Structure no. 0402-1

Built
1952
73 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
20
2005 count
Owner
Federal
Bureau of Reclamation

About this bridge

Gravel Road over Dam Spillway is a steel stringer/multi-beam or girder carrying Gravel Road over Dam Spillway in Sweetwater County, Wyoming. It was built in 1952, so it is 73 years old, older than the Wyoming average of 48.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 20 vehicles a day, projected to reach 20 by 2035. The structure is 53 ft (16.3 m) long and 14 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesGravel Road
CrossesDam Spillway
LocationBig Sandy Dam N of Farson
RouteFederal Lands Road 0
CountySweetwater County
StateWyoming
Coordinates42.24654, -109.42899
Functional classRural Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating81 US tons
Inventory rating62.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length53 ft (16.3 m)
Longest span52 ft (15.8 m)
Deck width14 ft (4.3 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (2005)
Projected traffic20 by 2035
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Reclamation
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Gravel Road over Dam Spillway built?

It was built in 1952, making it 73 years old in 2025.

What condition is Gravel Road over Dam Spillway in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Gravel Road over Dam Spillway carry?

About 20 vehicles per day (2005 count).

How long is Gravel Road over Dam Spillway?

The structure is 53 ft (16.3 m) long with a longest span of 52 ft (15.8 m) and a deck 14 ft wide.

Who owns Gravel Road over Dam Spillway?

It is owned by the Bureau of Reclamation and maintained by the Other Local Agency.