US Bridges

No Data Entered over Lake Fork Rock Creek

Fair

Carbon County, Montana · No Data Entered · Structure no. 010802000000206

Built
1952
73 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
29 ft
1 main span
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

No Data Entered over Lake Fork Rock Creek is a wood or timber stringer/multi-beam or girder carrying No Data Entered over Lake Fork Rock Creek in Carbon County, Montana. It was built in 1952, so it is 73 years old, older than the Montana average of 47 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 29 ft (8.8 m) long and 15 ft wide.

Location

Open in Google Maps
CarriesNo Data Entered
CrossesLake Fork Rock Creek
LocationNo Data Entered
RouteFederal Lands Road 23462
CountyCarbon County
StateMontana
Coordinates45.08097, -109.38497
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.2 US tons
Inventory rating25.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1 (+1 approach)
Design loadH 20
Structure length29 ft (8.8 m)
Longest span27 ft (8.3 m)
Deck width15 ft (4.7 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byPrivate (other than railroad)
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was No Data Entered over Lake Fork Rock Creek built?

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

What condition is No Data Entered over Lake Fork Rock Creek 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 August 2024.

How much traffic does No Data Entered over Lake Fork Rock Creek carry?

About 50 vehicles per day (latest count).

How long is No Data Entered over Lake Fork Rock Creek?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.3 m) and a deck 15 ft wide.

Who owns No Data Entered over Lake Fork Rock Creek?

It is owned by the U.S. Forest Service and maintained by the Private (other than railroad).