US Bridges

North Fork RD over Moose Creek 038

Good

Flathead County, Montana · 7M NW Polebridge · Structure no. L15175020+00001

Built
1976
49 years old
Condition
Good
inspected August 2023
Type
Channel Beam
Prestressed Concrete
Length
58 ft
1 main span
Daily traffic
73
2023 count
Owner
County
County Highway Agency

About this bridge

North Fork RD over Moose Creek 038 is a prestressed concrete channel beam carrying North Fork RD over Moose Creek 038 in Flathead County, Montana. It was built in 1976, so it is 49 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 73 vehicles a day, roughly 3% of them trucks, projected to reach 78 by 2043. The structure is 58 ft (17.7 m) long and 31 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesNorth Fork RD
CrossesMoose Creek 038
Location7M NW Polebridge
RouteCounty Highway 15175
StateMontana
Coordinates48.84004, -114.35521
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating35.1 US tons

Structure

Structure typeChannel Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span57 ft (17.4 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic73 (2023)
Projected traffic78 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 North Fork RD over Moose Creek 038 built?

It was built in 1976, making it 49 years old in 2025.

What condition is North Fork RD over Moose Creek 038 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 August 2023.

How much traffic does North Fork RD over Moose Creek 038 carry?

About 73 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is North Fork RD over Moose Creek 038?

The structure is 58 ft (17.7 m) long with a longest span of 57 ft (17.4 m) and a deck 31 ft wide.

Who owns North Fork RD over Moose Creek 038?

It is owned by the County Highway Agency.