US Bridges

Camas Road over Mcdonald Creek

Fair

Flathead County, Montana · 2 Miles North of U.S. Rou · Structure no. 1430005P0000000

Built
1962
63 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete Continuous
Length
160 ft
3 main spans
Daily traffic
560
2022 count
Owner
Federal
National Park Service

About this bridge

Camas Road over Mcdonald Creek is a concrete continuous tee beam carrying Camas Road over Mcdonald Creek in Flathead County, Montana. It was built in 1962, so it is 63 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 560 vehicles a day, roughly 3% of them trucks, projected to reach 672 by 2042. The structure is 160 ft (48.8 m) long and 42 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

Open in Google Maps
CarriesCamas Road
CrossesMcdonald Creek
Location2 Miles North of U.S. Rou
RouteFederal Lands Road 15401
CountyFlathead County
StateMontana
Coordinates48.52586, -113.99644
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation7: Better than present minimum 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 alignment8: Equal to present desirable criteria
Operating rating56 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length160 ft (48.8 m)
Longest span64 ft (19.5 m)
Deck width42 ft (12.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic560 (2022)
Projected traffic672 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed21.7 mi (35 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$60,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Camas Road over Mcdonald Creek built?

It was built in 1962, making it 63 years old in 2025.

What condition is Camas Road over Mcdonald 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 Camas Road over Mcdonald Creek carry?

About 560 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Camas Road over Mcdonald Creek?

The structure is 160 ft (48.8 m) long with a longest span of 64 ft (19.5 m) and a deck 42 ft wide.

Who owns Camas Road over Mcdonald Creek?

It is owned by the National Park Service.