US Bridges

IRR - US 2 over Drainage

Poor

Phillips County, Montana · 1M W Dodson · Structure no. P00001453+03801

Built
1973
52 years old, rebuilt 1998
Condition
Poor
inspected November 2024
Type
Culvert
Steel
Length
44 ft
3 main spans
Daily traffic
1,351
2023 count
Owner
State
State Highway Agency

About this bridge

IRR - US 2 over Drainage is a steel culvert carrying IRR - US 2 over Drainage in Phillips County, Montana. It was built in 1973 and reconstructed in 1998, so it is 52 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,351 vehicles a day, roughly 13% of them trucks, projected to reach 1,419 by 2043. The structure is 44 ft (13.5 m) long. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesIRR - US 2
CrossesDrainage
Location1M W Dodson
RouteU.S. Route 2
CountyPhillips County
StateMontana
Coordinates48.39781, -108.25936
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans3
Design loadHS 20
Structure length44 ft (13.5 m)
Longest span11 ft (3.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,351 (2023)
Projected traffic1,419 by 2043
Trucks13%
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 Drainage built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 1998.

What condition is IRR - US 2 over Drainage in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does IRR - US 2 over Drainage carry?

About 1,351 vehicles per day (2023 count), of which roughly 13% are trucks.

How long is IRR - US 2 over Drainage?

The structure is 44 ft (13.5 m) long with a longest span of 11 ft (3.4 m).

Who owns IRR - US 2 over Drainage?

It is owned by the State Highway Agency.