US Bridges

US 2 over Parmenter Creek

Good

Lincoln County, Montana · 1M NW Libby · Structure no. P00001031+01281

Built
1970
55 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
3,226
2023 count
Owner
State
State Highway Agency

About this bridge

US 2 over Parmenter Creek is a concrete slab carrying US 2 over Parmenter Creek in Lincoln County, Montana. It was built in 1970, so it is 55 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,226 vehicles a day, roughly 4% of them trucks, projected to reach 3,387 by 2043. The structure is 26 ft (7.9 m) long and 70 ft wide. If it were closed, the detour would be 65.2 mi (105 km).

CarriesUS 2
CrossesParmenter Creek
Location1M NW Libby
RouteU.S. Route 2
StateMontana
Coordinates48.39912, -115.57569
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span25 ft (7.6 m)
Deck width70 ft (21.2 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,226 (2023)
Projected traffic3,387 by 2043
Trucks4%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed65.2 mi (105 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 US 2 over Parmenter Creek built?

It was built in 1970, making it 55 years old in 2025.

What condition is US 2 over Parmenter Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2024.

How much traffic does US 2 over Parmenter Creek carry?

About 3,226 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US 2 over Parmenter Creek?

The structure is 26 ft (7.9 m) long with a longest span of 25 ft (7.6 m) and a deck 70 ft wide.

Who owns US 2 over Parmenter Creek?

It is owned by the State Highway Agency.