US Bridges

Whitefish Stage RD over Stillwater River

Fair

Flathead County, Montana · Kalispell · Structure no. U06728000+05501

Built
1975
50 years old
Condition
Fair
inspected October 2024
Type
Tee Beam
Prestressed Concrete
Length
153 ft
2 main spans
Daily traffic
7,156
2023 count
Owner
County
County Highway Agency

About this bridge

Whitefish Stage RD over Stillwater River is a prestressed concrete tee beam carrying Whitefish Stage RD over Stillwater River in Flathead County, Montana. It was built in 1975, so it is 50 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 5 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 7,156 vehicles a day, projected to reach 7,514 by 2043. The structure is 153 ft (46.6 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesWhitefish Stage RD
CrossesStillwater River
LocationKalispell
RouteCity Street 6728
CountyFlathead County
StateMontana
Coordinates48.21025, -114.30711
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadHS 20
Structure length153 ft (46.6 m)
Longest span75 ft (22.9 m)
Deck width32 ft (9.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,156 (2023)
Projected traffic7,514 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 Whitefish Stage RD over Stillwater River built?

It was built in 1975, making it 50 years old in 2025.

What condition is Whitefish Stage RD over Stillwater River 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 October 2024.

How much traffic does Whitefish Stage RD over Stillwater River carry?

About 7,156 vehicles per day (2023 count).

How long is Whitefish Stage RD over Stillwater River?

The structure is 153 ft (46.6 m) long with a longest span of 75 ft (22.9 m) and a deck 32 ft wide.

Who owns Whitefish Stage RD over Stillwater River?

It is owned by the County Highway Agency.