US Bridges

Ruby River DR over Ruby River 024

Good

Madison County, Montana · Laurin · Structure no. 000000000003606

Built
2017
8 years old
Condition
Good
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
73 ft
1 main span
Daily traffic
81
2023 count
Owner
County
County Highway Agency

About this bridge

Ruby River DR over Ruby River 024 is a prestressed concrete tee beam carrying Ruby River DR over Ruby River 024 in Madison County, Montana. It was built in 2017, so it is 8 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.

It carries about 81 vehicles a day, roughly 3% of them trucks, projected to reach 87 by 2043. The structure is 73 ft (22.2 m) long and 26 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

CarriesRuby River DR
CrossesRuby River 024
LocationLaurin
RouteCounty Highway 29103
StateMontana
Coordinates45.35283, -112.12195
Functional classRural Minor Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating51.8 US tons
Inventory rating40 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length73 ft (22.2 m)
Longest span70 ft (21.3 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic81 (2023)
Projected traffic87 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$105,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Ruby River DR over Ruby River 024 built?

It was built in 2017, making it 8 years old in 2025.

What condition is Ruby River DR over Ruby River 024 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 January 2024.

How much traffic does Ruby River DR over Ruby River 024 carry?

About 81 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Ruby River DR over Ruby River 024?

The structure is 73 ft (22.2 m) long with a longest span of 70 ft (21.3 m) and a deck 26 ft wide.

Who owns Ruby River DR over Ruby River 024?

It is owned by the County Highway Agency.