US Bridges

Forest Road 30100 over North Fk. Spread Ck.

Fair

Teton County, Wyoming · 11 Mi. Se. of Moran Wy · Structure no. 040306000001055

Built
1968
57 years old
Condition
Fair
inspected October 2021
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
34 ft
1 main span
Daily traffic
55
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road 30100 over North Fk. Spread Ck. is a wood or timber stringer/multi-beam or girder carrying Forest Road 30100 over North Fk. Spread Ck. in Teton County, Wyoming. It was built in 1968, so it is 57 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 55 vehicles a day, projected to reach 82 by 2045. The structure is 34 ft (10.4 m) long and 27 ft wide.

Location

Open in Google Maps
CarriesForest Road 30100
CrossesNorth Fk. Spread Ck.
Location11 Mi. Se. of Moran Wy
RouteFederal Lands Road 30100
CountyTeton County
StateWyoming
Coordinates43.76775, -110.31575
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.5 US tons
Inventory rating28.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadH 15
Structure length34 ft (10.4 m)
Longest span32 ft (9.9 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (—)
Projected traffic82 by 2045
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$125,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest Road 30100 over North Fk. Spread Ck. built?

It was built in 1968, making it 57 years old in 2025.

What condition is Forest Road 30100 over North Fk. Spread Ck. 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 2021.

How much traffic does Forest Road 30100 over North Fk. Spread Ck. carry?

About 55 vehicles per day (latest count).

How long is Forest Road 30100 over North Fk. Spread Ck.?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.9 m) and a deck 27 ft wide.

Who owns Forest Road 30100 over North Fk. Spread Ck.?

It is owned by the U.S. Forest Service.