US Bridges

NFSR 6438 over Spring Creek

Good

Meagher County, Montana · N 3.9 Mi. Jct. US12& 6438 · Structure no. 011506000013176

Built
2010
15 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
41 ft
1 main span
Daily traffic
40
Owner
Federal
U.S. Forest Service

About this bridge

NFSR 6438 over Spring Creek is a wood or timber stringer/multi-beam or girder carrying NFSR 6438 over Spring Creek in Meagher County, Montana. It was built in 2010, so it is 15 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 8 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 41 ft (12.5 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesNFSR 6438
CrossesSpring Creek
LocationN 3.9 Mi. Jct. US12& 6438
RouteFederal Lands Road 6438
StateMontana
Coordinates46.58648, -110.46824
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.2 US tons
Inventory rating33.2 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span38 ft (11.6 m)
Deck width16 ft (4.8 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
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 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 NFSR 6438 over Spring Creek built?

It was built in 2010, making it 15 years old in 2025.

What condition is NFSR 6438 over Spring Creek 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 NFSR 6438 over Spring Creek carry?

About 40 vehicles per day (latest count).

How long is NFSR 6438 over Spring Creek?

The structure is 41 ft (12.5 m) long with a longest span of 38 ft (11.6 m) and a deck 16 ft wide.

Who owns NFSR 6438 over Spring Creek?

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