US Bridges

California Ave over RR

Good

Lincoln County, Montana · Libby-California Ave · Structure no. P00033000+05601

Built
1999
26 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
271 ft
3 main spans
Daily traffic
4,833
2023 count
Owner
State
State Highway Agency

About this bridge

California Ave over RR is a prestressed concrete stringer/multi-beam or girder carrying California Ave over RR in Lincoln County, Montana. It was built in 1999, so it is 26 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 4,833 vehicles a day, roughly 1% of them trucks, projected to reach 5,075 by 2043. The structure is 271 ft (82.6 m) long and 54 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCalifornia Ave
CrossesRR
LocationLibby-California Ave
RouteState Highway 37
CountyLincoln County
StateMontana
Coordinates48.39553, -115.55024
Functional classRural Minor Arterial

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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating41 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length271 ft (82.6 m)
Longest span120 ft (36.5 m)
Deck width54 ft (16.5 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,833 (2023)
Projected traffic5,075 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was California Ave over RR built?

It was built in 1999, making it 26 years old in 2025.

What condition is California Ave over RR 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 September 2024.

How much traffic does California Ave over RR carry?

About 4,833 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is California Ave over RR?

The structure is 271 ft (82.6 m) long with a longest span of 120 ft (36.5 m) and a deck 54 ft wide.

Who owns California Ave over RR?

It is owned by the State Highway Agency.