US Bridges

Little Lake CR RD over Big Hole River 088

FairPosted for load

Beaverhead County, Montana · 3M NW Jackson · Structure no. L01086000+06001

Built
1974
51 years old, rebuilt 2010
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

Little Lake CR RD over Big Hole River 088 is a steel stringer/multi-beam or girder carrying Little Lake CR RD over Big Hole River 088 in Beaverhead County, Montana. It was built in 1974 and reconstructed in 2010, so it is 51 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 36 ft (11 m) long and 17 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesLittle Lake CR RD
CrossesBig Hole River 088
Location3M NW Jackson
RouteCounty Highway 1086
StateMontana
Coordinates45.40524, -113.44409
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating19 US tons
Inventory rating15 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadUnknown
Structure length36 ft (11 m)
Longest span35 ft (10.7 m)
Deck width17 ft (5.3 m)
Roadway width17 ft (5.3 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 closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$120,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Little Lake CR RD over Big Hole River 088 built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2010.

What condition is Little Lake CR RD over Big Hole River 088 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 Little Lake CR RD over Big Hole River 088 carry?

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

How long is Little Lake CR RD over Big Hole River 088?

The structure is 36 ft (11 m) long with a longest span of 35 ft (10.7 m) and a deck 17 ft wide.

Who owns Little Lake CR RD over Big Hole River 088?

It is owned by the County Highway Agency.