US Bridges

IRR BIA RTE 130 over West Magpie Creek

Good

Sanders County, Montana · 1.6KM N to US HWY 10 · Structure no. 00000000000P843

Built
2003
22 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
30
2021 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA RTE 130 over West Magpie Creek is a steel stringer/multi-beam or girder carrying IRR BIA RTE 130 over West Magpie Creek in Sanders County, Montana. It was built in 2003, so it is 22 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 30 vehicles a day, roughly 15% of them trucks, projected to reach 50 by 2041. The structure is 40 ft (12.3 m) long and 16 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesIRR BIA RTE 130
CrossesWest Magpie Creek
Location1.6KM N to US HWY 10
RouteFederal Lands Road 130
StateMontana
Coordinates47.30291, -114.48361
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99.1 US tons
Inventory rating90.3 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20 + Mod
Structure length40 ft (12.3 m)
Longest span39 ft (11.9 m)
Deck width16 ft (5 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2021)
Projected traffic50 by 2041
Trucks15%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerBureau of Indian Affairs
Maintained byBureau of Indian Affairs
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was IRR BIA RTE 130 over West Magpie Creek built?

It was built in 2003, making it 22 years old in 2025.

What condition is IRR BIA RTE 130 over West Magpie 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 June 2023.

How much traffic does IRR BIA RTE 130 over West Magpie Creek carry?

About 30 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is IRR BIA RTE 130 over West Magpie Creek?

The structure is 40 ft (12.3 m) long with a longest span of 39 ft (11.9 m) and a deck 16 ft wide.

Who owns IRR BIA RTE 130 over West Magpie Creek?

It is owned by the Bureau of Indian Affairs.