US Bridges

IRR - US 2 over Poplar River

Fair

Roosevelt County, Montana · W Poplar · Structure no. P00001611+00791

Built
2000
25 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
394 ft
3 main spans
Daily traffic
2,296
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - US 2 over Poplar River is a prestressed concrete stringer/multi-beam or girder carrying IRR - US 2 over Poplar River in Roosevelt County, Montana. It was built in 2000, so it is 25 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 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 2,296 vehicles a day, roughly 3% of them trucks, projected to reach 2,411 by 2043. The structure is 394 ft (120.1 m) long and 42 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesIRR - US 2
CrossesPoplar River
LocationW Poplar
RouteU.S. Route 2
CountyRoosevelt County
StateMontana
Coordinates48.11306, -105.21481
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating55 US tons
Inventory rating33 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length394 ft (120.1 m)
Longest span130 ft (39.5 m)
Deck width42 ft (12.7 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,296 (2023)
Projected traffic2,411 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 Poplar River built?

It was built in 2000, making it 25 years old in 2025.

What condition is IRR - US 2 over Poplar River 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 December 2024.

How much traffic does IRR - US 2 over Poplar River carry?

About 2,296 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is IRR - US 2 over Poplar River?

The structure is 394 ft (120.1 m) long with a longest span of 130 ft (39.5 m) and a deck 42 ft wide.

Who owns IRR - US 2 over Poplar River?

It is owned by the State Highway Agency.