US Bridges

IRR - US 2 over Devil Creek

Fair

Flathead County, Montana · 6M SW Summit · Structure no. P00001189+08181

Built
1963
62 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
2,025
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - US 2 over Devil Creek is a concrete slab carrying IRR - US 2 over Devil Creek in Flathead County, Montana. It was built in 1963, so it is 62 years old, older 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 6 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 2,025 vehicles a day, roughly 5% of them trucks, projected to reach 2,126 by 2043. The structure is 28 ft (8.5 m) long and 38 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIRR - US 2
CrossesDevil Creek
Location6M SW Summit
RouteU.S. Route 2
CountyFlathead County
StateMontana
Coordinates48.2501, -113.46811
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating51 US tons
Inventory rating31 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width38 ft (11.6 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,025 (2023)
Projected traffic2,126 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
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 - US 2 over Devil Creek built?

It was built in 1963, making it 62 years old in 2025.

What condition is IRR - US 2 over Devil 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 July 2023.

How much traffic does IRR - US 2 over Devil Creek carry?

About 2,025 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is IRR - US 2 over Devil Creek?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 38 ft wide.

Who owns IRR - US 2 over Devil Creek?

It is owned by the State Highway Agency.