US Bridges

No Data Entered over N.F. Little Thompson

Good

Sanders County, Montana · No Data Entered · Structure no. 011605000013460

Built
2005
20 years old
Condition
Good
inspected September 2021
Type
Stringer/Multi-beam or Girder
Steel
Length
51 ft
1 main span
Daily traffic
40
Owner
Federal
U.S. Forest Service

About this bridge

No Data Entered over N.F. Little Thompson is a steel stringer/multi-beam or girder carrying No Data Entered over N.F. Little Thompson in Sanders County, Montana. It was built in 2005, so it is 20 years old, younger than the Montana average of 47 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 40 vehicles a day, projected to reach 60 by 2045. The structure is 51 ft (15.4 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesNo Data Entered
CrossesN.F. Little Thompson
LocationNo Data Entered
RouteFederal Lands Road 519
StateMontana
Coordinates47.68679, -114.94092
Functional classRural Local

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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 rating56.1 US tons
Inventory rating43.2 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length51 ft (15.4 m)
Longest span49 ft (14.8 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (—)
Projected traffic60 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesFourth level (interchange)
CrossesWaterway
Detour if closed620.7 mi (999 km)
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was No Data Entered over N.F. Little Thompson built?

It was built in 2005, making it 20 years old in 2025.

What condition is No Data Entered over N.F. Little Thompson 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 September 2021.

How much traffic does No Data Entered over N.F. Little Thompson carry?

About 40 vehicles per day (latest count).

How long is No Data Entered over N.F. Little Thompson?

The structure is 51 ft (15.4 m) long with a longest span of 49 ft (14.8 m) and a deck 16 ft wide.

Who owns No Data Entered over N.F. Little Thompson?

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