US Bridges

Fdr #1079 over Big Beaver Cr.

Good

Beaverhead County, Montana · No Data Entered · Structure no. 010201000003053

Built
2006
19 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
45 ft
1 main span
Daily traffic
12
Owner
Federal
U.S. Forest Service

About this bridge

Fdr #1079 over Big Beaver Cr. is a wood or timber stringer/multi-beam or girder carrying Fdr #1079 over Big Beaver Cr. in Beaverhead County, Montana. It was built in 2006, so it is 19 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 12 vehicles a day, projected to reach 18 by 2045. The structure is 45 ft (13.7 m) long and 16 ft wide. If it were closed, the detour would be 620.7 mi (999 km).

CarriesFdr #1079
CrossesBig Beaver Cr.
LocationNo Data Entered
RouteFederal Lands Road 1079
StateMontana
Coordinates44.55192, -112.42982
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 inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length45 ft (13.7 m)
Longest span42 ft (12.8 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic12 (—)
Projected traffic18 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
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 Fdr #1079 over Big Beaver Cr. built?

It was built in 2006, making it 19 years old in 2025.

What condition is Fdr #1079 over Big Beaver Cr. 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 August 2024.

How much traffic does Fdr #1079 over Big Beaver Cr. carry?

About 12 vehicles per day (latest count).

How long is Fdr #1079 over Big Beaver Cr.?

The structure is 45 ft (13.7 m) long with a longest span of 42 ft (12.8 m) and a deck 16 ft wide.

Who owns Fdr #1079 over Big Beaver Cr.?

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