US Bridges

Conrad DR over Flathead River 013

Fair

Flathead County, Montana · Kalispell · Structure no. L15091000+05001

Built
2009
16 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
726 ft
4 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Conrad DR over Flathead River 013 is a steel continuous stringer/multi-beam or girder carrying Conrad DR over Flathead River 013 in Flathead County, Montana. It was built in 2009, so it is 16 years old, younger 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 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 726 ft (221.3 m) long and 40 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesConrad DR
CrossesFlathead River 013
LocationKalispell
RouteCounty Highway 15091
CountyFlathead County
StateMontana
Coordinates48.21038, -114.25781
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length726 ft (221.3 m)
Longest span197 ft (60 m)
Deck width40 ft (12.3 m)
Roadway width31 ft (9.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$974,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Conrad DR over Flathead River 013 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Conrad DR over Flathead River 013 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 2024.

How much traffic does Conrad DR over Flathead River 013 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is Conrad DR over Flathead River 013?

The structure is 726 ft (221.3 m) long with a longest span of 197 ft (60 m) and a deck 40 ft wide.

Who owns Conrad DR over Flathead River 013?

It is owned by the County Highway Agency.