US Bridges

N Lake Mcdonald Ro over Mcdonald Creek

Good

Flathead County, Montana · 11.3 Miles Northeast of U · Structure no. 1430055P0000000

Built
2024
1 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
220 ft
1 main span
Daily traffic
200
2017 count
Owner
Federal
National Park Service

About this bridge

N Lake Mcdonald Ro over Mcdonald Creek is a steel continuous stringer/multi-beam or girder carrying N Lake Mcdonald Ro over Mcdonald Creek in Flathead County, Montana. It was built in 2024, so it is 1 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, projected to reach 500 by 2037. The structure is 220 ft (67 m) long and 27 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesN Lake Mcdonald Ro
CrossesMcdonald Creek
Location11.3 Miles Northeast of U
RouteFederal Lands Road 15999
CountyFlathead County
StateMontana
Coordinates48.63528, -113.86667
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour evaluation has not been made
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length220 ft (67 m)
Longest span213 ft (65 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2017)
Projected traffic500 by 2037
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerNational Park Service
Maintained byNational Park Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$225,000
NavigationNo navigation control on waterway

Frequently asked questions

When was N Lake Mcdonald Ro over Mcdonald Creek built?

It was built in 2024, making it 1 years old in 2025.

What condition is N Lake Mcdonald Ro over Mcdonald 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 September 2024.

How much traffic does N Lake Mcdonald Ro over Mcdonald Creek carry?

About 200 vehicles per day (2017 count).

How long is N Lake Mcdonald Ro over Mcdonald Creek?

The structure is 220 ft (67 m) long with a longest span of 213 ft (65 m) and a deck 27 ft wide.

Who owns N Lake Mcdonald Ro over Mcdonald Creek?

It is owned by the National Park Service.