US Bridges

No Data Entered over Big Beaver

Good

Sanders County, Montana · No Data Entered · Structure no. 011407000000139

Built
1976
49 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Concrete
Length
76 ft
1 main span
Daily traffic
20
1993 count
Owner
Federal
U.S. Forest Service

About this bridge

No Data Entered over Big Beaver is a concrete stringer/multi-beam or girder carrying No Data Entered over Big Beaver in Sanders County, Montana. It was built in 1976, so it is 49 years old, older 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 20 vehicles a day, projected to reach 30 by 2045. The structure is 76 ft (23.3 m) long and 16 ft wide. If it were closed, the detour would be 33.6 mi (54 km).

Location

Open in Google Maps
CarriesNo Data Entered
CrossesBig Beaver
LocationNo Data Entered
RouteFederal Lands Road 301
CountySanders County
StateMontana
Coordinates47.69695, -115.55989
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating31.7 US tons
Inventory rating17.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckOther
Main spans1
Design loadHS 20
Structure length76 ft (23.3 m)
Longest span75 ft (22.9 m)
Deck width16 ft (5 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20 (1993)
Projected traffic30 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed33.6 mi (54 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$3,000
NavigationNo navigation control on waterway

Frequently asked questions

When was No Data Entered over Big Beaver built?

It was built in 1976, making it 49 years old in 2025.

What condition is No Data Entered over Big Beaver 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 No Data Entered over Big Beaver carry?

About 20 vehicles per day (1993 count).

How long is No Data Entered over Big Beaver?

The structure is 76 ft (23.3 m) long with a longest span of 75 ft (22.9 m) and a deck 16 ft wide.

Who owns No Data Entered over Big Beaver?

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