US Bridges

Going-To-The-Sun R over Logan Creek

Fair

Flathead County, Montana · 21.5 Miles Northeast of U · Structure no. 1430026P0000000

Built
1925
100 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete Continuous
Length
44 ft
2 main spans
Daily traffic
1,230
2017 count
Owner
Federal
National Park Service

About this bridge

Going-To-The-Sun R over Logan Creek is a concrete continuous slab carrying Going-To-The-Sun R over Logan Creek in Flathead County, Montana. It was built in 1925, so it is 100 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,230 vehicles a day, roughly 15% of them trucks, projected to reach 1,476 by 2037. The structure is 44 ft (13.3 m) long and 25 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesGoing-To-The-Sun R
CrossesLogan Creek
Location21.5 Miles Northeast of U
RouteFederal Lands Road 15400
CountyFlathead County
StateMontana
Coordinates48.72464, -113.76517
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating45.1 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length44 ft (13.3 m)
Longest span22 ft (6.6 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,230 (2017)
Projected traffic1,476 by 2037
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$83,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Going-To-The-Sun R over Logan Creek built?

It was built in 1925, making it 100 years old in 2025.

What condition is Going-To-The-Sun R over Logan Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does Going-To-The-Sun R over Logan Creek carry?

About 1,230 vehicles per day (2017 count), of which roughly 15% are trucks.

How long is Going-To-The-Sun R over Logan Creek?

The structure is 44 ft (13.3 m) long with a longest span of 22 ft (6.6 m) and a deck 25 ft wide.

Who owns Going-To-The-Sun R over Logan Creek?

It is owned by the National Park Service.