US Bridges

Kopp RD over Little Bitterroot Rv 062

FairPosted for load

Lake County, Montana · 8M NE Hot Springs · Structure no. L24132000+09001

Built
1955
70 years old, rebuilt 2004
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
35 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Kopp RD over Little Bitterroot Rv 062 is a wood or timber stringer/multi-beam or girder carrying Kopp RD over Little Bitterroot Rv 062 in Lake County, Montana. It was built in 1955 and reconstructed in 2004, so it is 70 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 35 ft (10.6 m) long and 20 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesKopp RD
CrossesLittle Bitterroot Rv 062
Location8M NE Hot Springs
RouteCounty Highway 24107
CountyLake County
StateMontana
Coordinates47.63063, -114.5643
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating30 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length35 ft (10.6 m)
Longest span35 ft (10.6 m)
Deck width20 ft (6.2 m)
Roadway width19 ft (5.7 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 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 Kopp RD over Little Bitterroot Rv 062 built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 2004.

What condition is Kopp RD over Little Bitterroot Rv 062 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 February 2025.

How much traffic does Kopp RD over Little Bitterroot Rv 062 carry?

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

How long is Kopp RD over Little Bitterroot Rv 062?

The structure is 35 ft (10.6 m) long with a longest span of 35 ft (10.6 m) and a deck 20 ft wide.

Who owns Kopp RD over Little Bitterroot Rv 062?

It is owned by the County Highway Agency.