US Bridges

Forest Road over Hall Creek

Good

Flathead County, Montana · Swan Lake Campground · Structure no. 011001000001254

Built
1997
28 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
28 ft
1 main span
Daily traffic
50
1997 count
Owner
Federal
U.S. Forest Service

About this bridge

Forest Road over Hall Creek is a prestressed concrete stringer/multi-beam or girder carrying Forest Road over Hall Creek in Flathead County, Montana. It was built in 1997, so it is 28 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 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 50 vehicles a day, projected to reach 75 by 2045. The structure is 28 ft (8.5 m) long and 20 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesForest Road
CrossesHall Creek
LocationSwan Lake Campground
RouteFederal Lands Road 1073
StateMontana
Coordinates47.93598, -113.84424
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.5 US tons
Inventory rating22.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span26 ft (8 m)
Deck width20 ft (6.1 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (1997)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Forest Road over Hall Creek built?

It was built in 1997, making it 28 years old in 2025.

What condition is Forest Road over Hall 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 July 2024.

How much traffic does Forest Road over Hall Creek carry?

About 50 vehicles per day (1997 count).

How long is Forest Road over Hall Creek?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (8 m) and a deck 20 ft wide.

Who owns Forest Road over Hall Creek?

It is owned by the U.S. Forest Service.