US Bridges

Steel Bridge LN over Red Rock River 084

GoodPosted for load

Beaverhead County, Montana · 4M NW Lima · Structure no. 000000202402186

Built
2024
1 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
60 ft
1 main span
Daily traffic
75
2023 count
Owner
County
County Highway Agency

About this bridge

Steel Bridge LN over Red Rock River 084 is a wood or timber stringer/multi-beam or girder carrying Steel Bridge LN over Red Rock River 084 in Beaverhead County, Montana. It was built in 2024, so it is 1 years old, younger than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. Its operating status is: posted for load restriction.

It carries about 75 vehicles a day, roughly 3% of them trucks, projected to reach 80 by 2043. The structure is 60 ft (18.4 m) long and 10 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesSteel Bridge LN
CrossesRed Rock River 084
Location4M NW Lima
RouteCounty Highway 1266
StateMontana
Coordinates44.67538, -112.62378
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation*: *
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating—
Inventory rating—

Structure

MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length60 ft (18.4 m)
Longest span58 ft (17.7 m)
Deck width10 ft (3.1 m)
Roadway width10 ft (3.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2023)
Projected traffic80 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Steel Bridge LN over Red Rock River 084 built?

It was built in 2024, making it 1 years old in 2025.

What condition is Steel Bridge LN over Red Rock River 084 in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Steel Bridge LN over Red Rock River 084 carry?

About 75 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Steel Bridge LN over Red Rock River 084?

The structure is 60 ft (18.4 m) long with a longest span of 58 ft (17.7 m) and a deck 10 ft wide.

Who owns Steel Bridge LN over Red Rock River 084?

It is owned by the County Highway Agency.