US Bridges

IRR BIA Route 166 over Revais Creek

Fair

Sanders County, Montana · 4.0K South of HWY 200 · Structure no. 00000000000P846

Built
2014
11 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
30
2023 count
Owner
Federal
Bureau of Indian Affairs

About this bridge

IRR BIA Route 166 over Revais Creek is a steel stringer/multi-beam or girder carrying IRR BIA Route 166 over Revais Creek in Sanders County, Montana. It was built in 2014, so it is 11 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 30 vehicles a day, roughly 10% of them trucks, projected to reach 30 by 2043. The structure is 67 ft (20.5 m) long and 25 ft wide. If it were closed, the detour would be 35.4 mi (57 km).

CarriesIRR BIA Route 166
CrossesRevais Creek
Location4.0K South of HWY 200
RouteFederal Lands Road 166
StateMontana
Coordinates47.28025, -114.40192
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.9 US tons
Inventory rating51 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length67 ft (20.5 m)
Longest span32 ft (9.7 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2023)
Projected traffic30 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed35.4 mi (57 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was IRR BIA Route 166 over Revais Creek built?

It was built in 2014, making it 11 years old in 2025.

What condition is IRR BIA Route 166 over Revais Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does IRR BIA Route 166 over Revais Creek carry?

About 30 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is IRR BIA Route 166 over Revais Creek?

The structure is 67 ft (20.5 m) long with a longest span of 32 ft (9.7 m) and a deck 25 ft wide.

Who owns IRR BIA Route 166 over Revais Creek?

It is owned by the Bureau of Indian Affairs.