US Bridges

Bobtail Cutoff RD over Pipe Creek 027

Good

Lincoln County, Montana · 6M NW Libby · Structure no. L27148002+08001

Built
1950
75 years old, rebuilt 2012
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
190
2023 count
Owner
County
County Highway Agency

About this bridge

Bobtail Cutoff RD over Pipe Creek 027 is a steel stringer/multi-beam or girder carrying Bobtail Cutoff RD over Pipe Creek 027 in Lincoln County, Montana. It was built in 1950 and reconstructed in 2012, so it is 75 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 190 vehicles a day, roughly 3% of them trucks, projected to reach 203 by 2043. The structure is 40 ft (12.1 m) long and 26 ft wide. If it were closed, the detour would be 16.8 mi (27 km).

CarriesBobtail Cutoff RD
CrossesPipe Creek 027
Location6M NW Libby
RouteCounty Highway 27148
StateMontana
Coordinates48.47918, -115.52736
Functional classRural Minor Collector

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 within limits of footing or piles
Structural evaluation7: Better than 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 alignment6: Equal to present minimum criteria
Operating rating39.7 US tons
Inventory rating30.8 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length40 ft (12.1 m)
Longest span40 ft (12.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic190 (2023)
Projected traffic203 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.8 mi (27 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Bobtail Cutoff RD over Pipe Creek 027 built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2012.

What condition is Bobtail Cutoff RD over Pipe Creek 027 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 Bobtail Cutoff RD over Pipe Creek 027 carry?

About 190 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Bobtail Cutoff RD over Pipe Creek 027?

The structure is 40 ft (12.1 m) long with a longest span of 40 ft (12.1 m) and a deck 26 ft wide.

Who owns Bobtail Cutoff RD over Pipe Creek 027?

It is owned by the County Highway Agency.