US Bridges

Beaver Creek RD over Larb Creek 106

FairPosted for load

Valley County, Montana · 6M SE Saco · Structure no. L53505006+01001

Built
1987
38 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
1 main span
Daily traffic
19
2023 count
Owner
County
County Highway Agency

About this bridge

Beaver Creek RD over Larb Creek 106 is a steel stringer/multi-beam or girder carrying Beaver Creek RD over Larb Creek 106 in Valley County, Montana. It was built in 1987, so it is 38 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 6 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 19 vehicles a day, roughly 3% of them trucks, projected to reach 20 by 2043. The structure is 74 ft (22.6 m) long and 27 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesBeaver Creek RD
CrossesLarb Creek 106
Location6M SE Saco
RouteCounty Highway 53413
CountyValley County
StateMontana
Coordinates48.39403, -107.27236
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating34 US tons
Inventory rating20 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length74 ft (22.6 m)
Longest span72 ft (21.9 m)
Deck width27 ft (8.3 m)
Roadway width22 ft (6.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19 (2023)
Projected traffic20 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$116,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Beaver Creek RD over Larb Creek 106 built?

It was built in 1987, making it 38 years old in 2025.

What condition is Beaver Creek RD over Larb Creek 106 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 April 2024.

How much traffic does Beaver Creek RD over Larb Creek 106 carry?

About 19 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Beaver Creek RD over Larb Creek 106?

The structure is 74 ft (22.6 m) long with a longest span of 72 ft (21.9 m) and a deck 27 ft wide.

Who owns Beaver Creek RD over Larb Creek 106?

It is owned by the County Highway Agency.