US Bridges

IRR - US 2 over Milk River

Fair

Phillips County, Montana · 2M W Dodson · Structure no. P00001451+07601

Built
1972
53 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
256 ft
3 main spans
Daily traffic
1,253
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - US 2 over Milk River is a prestressed concrete stringer/multi-beam or girder carrying IRR - US 2 over Milk River in Phillips County, Montana. It was built in 1972, so it is 53 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 1,253 vehicles a day, roughly 14% of them trucks, projected to reach 1,316 by 2043. The structure is 256 ft (78 m) long and 46 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesIRR - US 2
CrossesMilk River
Location2M W Dodson
RouteU.S. Route 2
StateMontana
Coordinates48.40252, -108.2936
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.9 US tons
Inventory rating35.1 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length256 ft (78 m)
Longest span102 ft (31.1 m)
Deck width46 ft (14.1 m)
Roadway width44 ft (13.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,253 (2023)
Projected traffic1,316 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 Milk River built?

It was built in 1972, making it 53 years old in 2025.

What condition is IRR - US 2 over Milk 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 November 2024.

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

About 1,253 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is IRR - US 2 over Milk River?

The structure is 256 ft (78 m) long with a longest span of 102 ft (31.1 m) and a deck 46 ft wide.

Who owns IRR - US 2 over Milk River?

It is owned by the State Highway Agency.